Circular No. 29/2017/TT-BTTTT Issuing "National Technical Regulations on Mobile Ground Station Equipment Operating in the Ku Band"

 

CIRCULAR

ISSUING THE NATIONAL TECHNICAL REGULATION ON MOBILE SATELLITE EARTH STATION (MES) OPERATING IN THE KU BAND

      On the basis of Decree No.

||| Pursuant to the Law on Telecommunications dated November 23, 2009;

||| Pursuant to the Law on Radio Frequency dated November 23, 2009;

||| Pursuant to the Government Decree No. 127/2007/NĐ-CP dated August 1, 2007 detailing and guiding the implementation of certain provisions of the Law on Standards and Technical Regulations;

||| Pursuant to the Government Decree No. 17/2017/NĐ-CP dated February 17, 2017 stipulating the functions, tasks, powers, and organizational structure of the Ministry of Information and Communications;

||| At the proposal of the Director of the Science and Technology Department,

||| The Minister of Information and Communications hereby issues this Circular to provide regulations on the national technical standards for mobile satellite earth stations operating in the Ku band.in||| This Circular promulgates the National Technical Regulation on Mobile Satellite Earth Station (MES) Operating in the Ku Band (QCVN 116:2017/BTTTT).rime Minister c||| The Heads of the Office, Directors of the Science and Technology Departments, Heads of agencies and units under the Ministry of Information and Communications, Directors of Provincial and Municipal Departments of Information and Communications, and relevant organizations and individuals shall be responsible for implementing this Circular.ầ||| NATIONAL TECHNICAL REGULATION ON MOBILE SATELLITE EARTH STATION (MES) OPERATING IN THE KU BAND

Article 1. ||| National technical regulation on Mobile satellite Earth Station (MES) operating in the Ku band

Article 2. This Circular takes effect from July 1, 2018.

Article 3. 2. PROVISIONS

 

 

QCVN 116:2017/BTTTT

2.1. Environmental conditions

2.2. Technical requirements

TABLE OF CONTENTS

Chapter 1. GENERAL PROVISIONS

1.1. Scope of Application

1.2. Applicability

1.3. Referenced Documents

1.4. Terms and Definitions

1.5. Abbreviations

2.2.1. Out-of-band unwanted emissionsYards PROCEDURES

2.2.2. In-band unwanted emissions

2.2.3. Off-axis EIRP density within the designated bandwidth

2.2.4. Control and monitoring functions (CMF)

2.2.5. Off-axis antenna gain pattern

2.2.6. Blocking performance

2.2.7. Adjacent channel selectivity

3.1. Out-of-band unwanted emissions

3.1.1. General requirements

3.1.2. Measurement location

3. MEASUREMENT METHODS

3.1.3. Measurement method

3.1.4. Measurement procedure

3.2. In-band unwanted emissions

3.2.1. Measurement method

3.3. Off-axis EIRP density within the designated bandwidth

3.3.1. General requirements

3.3.2. Static directional antenna rms accuracy

3.3.3. Off-axis EIRP measurement without antenna

3.3.4. Off-axis EIRP measurement with antenna

3.4. Control and monitoring

3.4.1. Measurement diagram

3.4.2. Processor monitoring

3.4.3. Transmission subsystem monitoring

3.4.4. Power off

3.4.5. Control channel reception (CC)

3.4.6. Network control commands

3.4.7. Preamble transmission

3.5. Off-axis antenna gain pattern

3.5.1. Measurement location

3.5.2. Measurement method

3.6. Blocking performance

3.7. Adjacent channel selectivity

6. T

QCVN 116:2017/BTTTT is based on the European Telecommunications Standards Institute standard ETSI EN 301 427 V2.1.1 (2016-06).

QCVN 116:2017/BTTTT was drafted by the Post and Telecommunications Engineering Science Institute, reviewed by the Science and Technology Department, and issued by the Ministry of Information and Communications pursuant to Circular No. 29/2017/TT-BTTTT dated November 7, 2017.

4. REQUIREMENTSỀ MANAGEMENT

5. RESPONSIBILITIES OF ORGANIZATIONS AND INDIVIDUALS

TECHNICAL REGULATIONỔ IMPLEMENTATION

LIST OF REFERENCES

Foreword

N

K

 

NATIONAL TECHNICAL REGULATION ONMOBILE SATELLITE EARTH STATIONOPERATING IN THE KU BANDỀ National technical regulation on Mobile satellite Earth Station (MES) operating in the Ku bandẶThis regulation sets forth the requirements for radio frequency spectrum for mobile satellite earth stations (land mobile earth stations) (MES), excluding maritime mobile earth stations, operating in the Ku band.Ấ- This regulation applies to MES operating in the fixed-satellite service (FSS) frequency bands:The decision to switch the issuance of coats, overcoats, windbreakers, and down jackets to other uniforms for civil servants working at the National Market Management and Development Agency is decided by the Minister of Industry and Trade.

• 10.70 GHz to 11.70 GHz (downlink); Provincial People's Committees set specific prices• 12.50 GHz to 12.75 GHz (downlink);

Chapter 1. GENERAL PROVISIONS

1.1. Scope of Application

• 14.00 GHz to 14.25 GHz (uplink).

- MES may be:

+ Land mobile earth station (LMES), and/or

+ Maritime mobile earth station (MMES) not providing safety and rescue functions required by the International Maritime Organization (IMO).

- LMES may be mounted on vehicles or handheld devices.

- MMES is equipment installed on ships.

- MES may include several modules with user interfaces.

- MES uses linear polarization.

- MES operates through geostationary satellites separated by 3 degrees in the same band and areas.

- The antennas of MES may be omnidirectional or directional.

- MES operates as part of a satellite network used for information distribution and exchange between users.

- MES is controlled and monitored by the network control function (NCF).

This technical regulation applies to agencies, organizations, and individuals, both domestic and foreign, engaged in production, business, and exploitation of equipment within the scope of this regulation on the territory of Vietnam.

CISPR 16-1: "Specification for radio disturbance and immunity measuring apparatus and methods; Part 1: Radio disturbance and immunity measuring apparatus".

1.4.1. Carrier-off state

MES is in this state when MES is allowed to transmit by the NCF but does not transmit signals or is not allowed to transmit by the NCF.

1.2. Applicability

1.4.2. Carrier-on state

1.3. Referenced Documents

MES is in this state when MES is allowed to transmit and transmits a signal by the NCF.

1.4. Terms and Definitions

1.4.3. Control Channel (CC) One or more channels through which MES receives control signals from the NCF.

1.4.4. Externally Mounted Equipment (EME)

EME includes modules of installable equipment (IE) intended to be mounted externally on vehicles as published by the manufacturer. 1.4.5. Installable Equipment (IE)

Equipment used to equip vehicles.

NOTE: IE may include one or more interconnected modules. 1.4.6. Internally Mounted Equipment (IME)

Modules of IE not declared by the manufacturer as EME are defined as IME.

1.4.7. Mobile Earth station (MES) A terrestrial station belonging to the mobile-satellite service used while in motion or stopped at unspecified points.

1.4.8. Nominated bandwidth

(nominated bandwidth) (Installable Equipment (IE))

Equipment used to fit vehicles.

NOTE: IE may include one or more modules interconnected with each other.

1.4.6. Internally Mounted Equipment (IME) (IME)

Modules of IE not declared by the manufacturer as EME are defined as IME.

1.4.7. Mobile Earth Station (MES) (MES)

A terrestrial station for satellite mobile services used while in motion or stopped at unspecified points.

1.4.8. Nominated Bandwidth (nominated bandwidth)

The transmission bandwidth of the radio frequency MES is determined by the manufacturer. The nominal bandwidth must be large enough to contain all the components of the transmitted frequency spectrum with levels greater than the unwanted emission limits specified and taking into account the stability of the transmitted carrier frequency.

1.4.9. Portable Equipment (PE) (Portable Equipment (PE))

A complete device, either desk-top or portable. A PE generally consists of one or several blocks connected together.

1.4.10. Unwanted Emissions (Unwanted Emissions)

Emissions outside the nominal bandwidth.

1.4.11. E-plane (E-plane)

For a linearly polarized antenna, this is the plane containing the electric field vectors and the direction of maximum radiation. The electric field or E-plane defines the polarization or direction of the radio wave. For a vertically polarized antenna, the E-plane usually coincides with vertical planes. For a horizontally polarized antenna, the E-plane usually coincides with horizontal planes.

1.5. Abbreviations

Chapter 2. TECHNICAL PROVISIONS

2.2.2. In-band unwanted emissions

Technical requirements of this standard apply under the environmental operating conditions declared by the manufacturer for the equipment. The equipment must comply with all technical requirements of this standard when operating within the declared environmental operating conditions.

The environmental operating conditions of the equipment must include ranges of humidity, temperature, and power supply.

2.2.3. Off-axis EIRP density within the designated bandwidth

2.2.4. Control and monitoring functions (CMF)

2.2.1.1. Purpose

To protect terrestrial and satellite services from unwanted emissions from MES outside the band from 14,00 GHz to 14,25 GHz.

2.2.1.2. Requirements

Unwanted emissions measured in the measurement bandwidth and in all directions from MES outside the band from 14,00 GHz to 14,25 GHz must be below the following limit:

1. Unwanted emissions in the frequency range from 30 MHz to 1,000 MHz must not exceed the limits in Table 1a for LMES and Table 1b for MMES.

Table 1a - Limits on unwanted emissions for LMES at frequenciesNo. from 30 MHz to 1,000 MHz at a measurement distance of 10 m with a measurement bandwidth of 120 kHz

Table 1b - Limits on unwanted emissions for MMES at frequenciesNo. from 30 MHz to 1,000 MHz at a measurement distance of 10 m with a measurement bandwidth of 120 kHz

Transition frequencies are subject to lower limits.

2. The equivalent isotropically radiated power (EIRP) of unwanted emissions for frequencies above 1,000 MHz in the measurement bandwidth and in all directions must not exceed the limits specified in Table 2.

Table 2 - Limits on unwanted emissions at frequencies above 1 000 MHz and outside the bandầfrom 14,00 GHz to 14,25 GHz

Transition frequencies are subject to lower limits.

2.2.1.3. Measurement

As per Article 3.1.

2.2.5. Off-axis antenna gain pattern

2.2.2.1. Purpose

To protect primary services operating in the band from 14,00 GHz to 14,25 GHz.

2.2.2.2. Requirements

Requirement 1: Carrier present state

The EIRP spectral density of unwanted emissions will be less than or equal to 4 -10 log N dBW/100 kHz in the band from 14,00 GHz to 14,25 GHz and outside the nominal bandwidth.

Where N is the largest number of MES simultaneously transmitting on the same frequency. The simultaneous transmission time of MES does not exceed 0.01% of the time. The values of N and the operating conditions of the system are declared by the manufacturer.

Requirement 2: Carrier absent state

The EIRP spectral density of any emissions in the band from 14,00 GHz to 14,25 GHz is less than or equal to -21 dBW/100 kHz.

2.2.2.3. Measurement

As per Article 3.2.

2.2.6. Blocking performance

2.2.3.1. Purpose

To protect other satellite systems using similar bands.

2.2.3.2. Requirements

For directional antennas, the maximum EIRP in any 40 kHz interval from any MES polarized in the direction Ф degrees from the main lobe axis of the antenna shall not exceed the limits in the geostationary orbit separated by 3°:

Where Ф is the angle between the main lobe axis and the direction under consideration (in degrees). The value of δФ is:

a) The effective value of the antenna, or

b) Twice the effective value of the antenna, whichever is larger.

K is the power density ratio between the fully loaded system and the MES measured in a 40 kHz bandwidth.

The value of K for all technical characteristics and operating conditions declared by the manufacturer will be recorded in the test report results.

These limits apply over the latitude range and geostationary orbit that the manufacturer declares.

For non-directional antennas, the maximum EIRP over any 40 kHz interval in any direction shall not exceed:

-6 - 10 log (K) dBW/40 kHz;

Where K is defined as above.

2.2.3.3. Measurement

As per Article 3.3.

2.2.7. Adjacent channel selectivity

The following minimum control and monitoring functions must be used for MES to minimize the possibility of MES generating unwanted emissions and causing harmful interference to other systems.

MES is limited and must apply the no-carrier state when transmitting any error condition.

2.2.4.1. Processor Monitoring

1. Objective

To ensure that MES can prohibit transmission in the event of a processing subsystem failure.

2. Requirements

MES must combine the monitoring function of the processor with each of its processors related to traffic management and control functions.

The processor monitoring function must detect hardware and software errors of the processor.

Within one second after an error occurs, MES switches to a carrier-off state until the processor monitoring function determines that all errors have been resolved.

3. Measurement and Testing As per Article 3.4.

2.2.4.2. Monitoring the transmission subsystem

1. Objective

To ensure the accurate operation of the transmission frequency subsystem and limit transmission if the subsystem fails.

2. Requirements

MES will monitor the operation of its transmission frequency subsystems.

Not more than five seconds after an error occurs in the transmission frequency subsystem, MES switches to a carrier-off state until the transmission subsystem monitoring function determines that all errors have been resolved.

3. Measurement and Testing

As per Article 3.4.

2.2.4.3. Power Off

1. Objective

To ensure that MES achieves a controlled non-transmitting state after power off of the equipment, or when the operator performs a power off function if available.

2. Requirements

During the power off function, MES remains in a carrier-off state.

3. Measurement and Testing As per Article 3.4.

2.2.4.4. Reception of Control Channel (CC)

1. Objective

To ensure that MES cannot transmit unless it accurately receives the control channel notification from NCF.

2. Requirements

a) If there is no accurate reception of CC notifications from NCF, MES will remain in a carrier-off state.

b) MES must switch to a carrier-off state immediately after a period not exceeding thirty seconds without accurately receiving the CC notification from NCF.

3. Measurement and Testing

As per Article 3.4.

2.2.4.5. Network Control Commands

1. Objective

These requirements ensure that MES has the ability to:

a) Maintain a unique identification in the network and transmit it upon receipt of a suitable request;

b) Receive commands from NCF via CC and execute these commands.

2. Requirements

MES must store its unique network identification code.

MES must be capable of receiving through its CC purposeful notifications (sent to MES) from NCF and containing:

- Permission to transmit command;

- Prohibition to transmit command;

- Identification request.

Upon receiving the permission to transmit command, MES is allowed to transmit.

After power on, MES will remain in a carrier-off state until it receives the permission to transmit command. For systems without expected permission to transmit command, after power on MES may only transmit initialization bursts (see 22.5.6).

Upon receiving the prohibition to transmit command, within one second MES switches to a carrier-off state until the prohibition to transmit command is replaced by the next permission to transmit command.

MES must be able to transmit its unique identification code when receiving an identification request.

3. Measurement and Testing As per Article 3.4.

2.2.4.6. Transmission of Initialization Bursts

1. Objective

To limit interference to other services.

2. Requirements

For systems without expected permission to transmit command, after power off MES may transmit initialization bursts:

a) Transmission of initialization bursts shall not exceed 1% of time;

b) Each burst shall not last longer than one second.

3. Measurement and Testing As per Article 3.4.

2.2.5. Diagram of Antenna Side Lobe Gainamend2.2.5.1. Purpose

To protect desired signals from interference from terrestrial operations and from other satellite operations.

2.2.5.2. Requirements

The maximum antenna gain of each co-polar component at any polarization angle φ degrees from the main beam axis of the antenna shall not exceed the following limits:

G = 32-25 log φ dBi with (φmin ≤ φ < 48

G = -10 dBi with 48⁰

≤ φ ≤ 85 °⁰ G = 0 dBi with 85° ≤ φ ≤ 180°

φmin = 1° or 100 λ/D degrees, whichever is greater, with D / λ ≥ 50.

Where:

φmin = 2

or 114 (D / λ)⁰ degrees, whichever is greater, with D / A <50.^-1,09 D is the nominal diameter of the antenna.

The maximum antenna gain of each cross-polar component at any polarization angle φ degrees from the main beam axis of the antenna shall not exceed the following limits:

Gx (φ) = 23-20 log φ dBi with φr ≤ φ ≤ 7

φr = 1° or 100 λ/D, whichever is greater.⁰

Where:

2.2.5.3. Measurement and Testing

As per Article 3.5.

2.2.6.1. Purpose

3.1.1. General requirements

To prevent high-power signals outside the reception bands from interfering with signals received within the reception band.

2.2.6 2. Requirements

The receiver blocking described here is achieved through compression of the gain for signals within the reception band due to signals received outside the band at high power. Other signal levels are compared to the level of a signal within the reception band frequency that would cause similar gain compression.

Receiver blocking rejects a specific frequency determined as the second signal level at this frequency causing a certain amount of gain compression to the first signal in the reception band minus the second signal level at a frequency within the reception band during the gain compression process.

The first signal must be at the center frequency of the reception band and within the operating range. The second signal must compress the gain relative to the first signal by 1 dB.

The rejection is performed according to Table 3.

Table 3 - Receiver Blocking Rejection Minimum

Bn lBelow 9 GHzNo.20 dB

To allow reception of the desired signal when another signal is transmitted on adjacent frequencies from the target satellite orbit position with high EIRP density.

NOTE: The energy levels of signals transmitted from orbit positions are controlled by satellite operators. Signals transmitted from an adjacent orbit position that does not closely match the antenna side lobe gain diagram will be suppressed.

2.2.7.2. Requirements"b) In addition to the lists of public services issued according to the provisions of Clause 2, Article 4 of this Decree, specialized agencies under provincial People's Committees shall report to the provincial People's Committee for decision-making on amending, supplementing, or issuing the list of public services funded by the state budget within their jurisdiction and consistent with the local budget capacity within the approved budget by the Provincial People's Assembly, and send it to the Ministry of Finance and relevant ministries and sectors for supervision during implementation."Adjacent signal selection is a measure of the receiver's ability to receive a signal at the assigned channel frequency while the presence of an adjacent signal at a frequency offset from the center frequency of the assigned channel. The adjacent signals will occupy a bandwidth similar to the desired signal. The offset frequency and corresponding power level of the adjacent signal relative to the desired signal must take values provided in Table 4. BW is the occupied bandwidth of the desired signal.

Table 4 - Adjacent Signal Frequency and Power Level

Signal

Offset from the center frequency of the desired signal

Relative power level from the desired signal

Adjacent Carrier

Bn lBW

The reduction in the required signal-to-noise ratio due to adjacent signal must not exceed 0.5 dB.

2.2.7.3. Measurement Inspection

Pursuant to Article 3.7.

3. MEASUREMENT METHODS

The values of measurement uncertainty associated with each parameter of the measurement shall be applied to all cases of testing under this standard. The measurement uncertainty shall not exceed the values provided in Table 5.

Bn lTable 5 - Measurement Uncertaintyn lThe Minister of Science and Technology issues this Circular amending and supplementing some articles of Circular No. 09/2016/TT-BKHCN dated June 9, 2016, issued by the Minister of Science and Technology, on the procedures and formalities for issuing permits for transporting dangerous goods, which are oxidizing substances, organic peroxides (Class 5), and corrosive substances (Class 8) via road, rail, and inland waterway transport under the responsibility of the Ministry of Science and Technology.n l° đ°

To perform the measurements of operational parameters, specialized measuring equipment (STE) provided by the manufacturer must be used. Since these specialized measuring devices are specifically defined for each system, detailed measurement requirements cannot be provided in this standard. However, the following basic principles must be ensured:

- If the MES requires receiving a modulated carrier wave from a satellite for transmission, then a separate measurement setup must be arranged to simulate the satellite signal, allowing the MES to transmit for the measurement of transmission parameters.

- Any characteristic of the specialized measurement setup that may directly or indirectly affect the measured parameters must be clearly specified by the manufacturer.

All measurements involving carrier waves must be conducted when the transmitter has the maximum possible transmission power and cluster speed.

All technical characteristics and operating conditions declared by the manufacturer must be included in the test result report.

3.1.3. Measurement method

3.1.4. Measurement procedure

For testing purposes, the device under test (EUT) includes:

a) For IE:

- EME;

- IME;

- Connection cables between the IME and EME systems;

- Necessary power cables and other types of cables to ensure proper operation of the terminal equipment.

b) For PE:

- A PE module, which includes components to configure it for normal operation;

- Multiple PE modules, all modules with necessary connection cables provided by the manufacturer including components to ensure normal system operation.

For measurements up to 1,000 MHz, the distance between the EUT and the measurement antenna is 10 meters. For measurements above 1,000 MHz, the distance between the EUT or substitute antenna and the measurement antenna must be sufficient to prevent overlapping near-field radiation from each antenna. The larger near-field radiation of the EUT and substitute antenna is used to determine the minimum distance between the EUT and the measurement antenna in the first case.

3.1.2. Measurement Position

Measurements must be performed outdoors or in a semi-anechoic or anechoic chamber. Background noise levels must be at least 6 dB lower than the unwanted emission limits.

Outdoor measurement positions must be flat, free of hanging wires and nearby reflective structures, wide enough to place antennas at the specified measurement distances, and have adequate separation between the antennas, measuring equipment, and reflective structures.

A metal ground plane is placed on the ground. The ground plane must extend at least 1 meter beyond the perimeter of the EUT at one end and extend at least 1 meter beyond the measurement antenna at the other end.

3.2.1. Measurement method

For IE, the EUT must be positioned between IME and EME, spaced 0.5 meters apart, with connection cables plugged in according to the maximum length specified by the manufacturer. Cable height must be between 0.5 meters and 1 meter, held in position by non-metallic fixtures. In the nominal configuration, EME is placed on a non-metallic table at a height of 0.5 meters to 1 meter. IME is placed on a non-metallic table at a height of 0.8 meters for measurements up to 1,000 MHz and 0.5 meters to 1 meter for measurements above 1,000 MHz. Any accessories related to the equipment, such as laptops or data terminal devices, required for MES operation must be placed alongside and at the same height as IME.

For PE, the device must be configured for normal operation according to the manufacturer's recommendations and placed on a non-metallic table at a height of 0.5 meters to 1 meter.

The EUT must be connected to appropriate impedances at ground ports if suitable devices are not connected to those ports as required by the manufacturer in the user manual.

For frequencies up to 80 MHz, the measurement antenna must be a balanced dipole of resonant length at 80 MHz and must be adapted to the ground plane using an appropriate matching device. Broadband antenna measurements can be performed if the measurement position is standardized according to the requirements of CISPR 16-1.

For frequencies from 80 MHz to 1,000 MHz, the measurement antenna must be a balanced dipole of resonant length. Broadband antenna measurements can be performed if the measurement position is standardized according to the requirements of CISPR 16-1.

For frequencies higher than 1,000 MHz, the measurement antenna is a log-periodic antenna with known gain/frequency characteristics. When used for reception, the antenna and amplifier system must have an amplitude/frequency response within ±2 dB of the reference curves over the measurement frequency range for the antenna.

3.1.3.1. Receiving Test Equipment

1. Receiver for measurements up to 1,000 MHz

The receiver must have the following features:

- Response to a constant-amplitude sine wave signal must remain within ±1 dB across the entire measurement frequency band;

- Use of peak-detection separation within -6 dB with a bandwidth of 120 kHz;

- The receiver must operate below 1 dB compression point throughout the measurement process.

2. Spectrum analyzer for measurements above 1,000 MHz

The spectrum analyzer resolution bandwidth must be set equal to the measurement bandwidth. If the resolution bandwidth differs from the specified measurement bandwidth, broadband noise signal bandwidth must be calibrated. The measurement system must be capable of detecting signals at least 6 dB below the applicable unwanted emission limit.

3.3. Off-axis EIRP density within the designated bandwidth

3.1.4.1. Measurement Diagrams

Figure 1 - Measurement Diagram for Unwanted Emission, First Axis

Figure 2 - Measurement Diagram for Unwanted Emission, Second Axis

Figure 3 - Measurement Diagram for Unwanted Emission, Third Axis

3.1.4.2. Measurements up to 1,000 MHz

a) Measurement diagram as shown in Figure 1 with the receiving test equipment being the receiver. The EUT adjusts the antenna to align the antenna adjustment axis on the rotating plane. The antenna adjustment axis must coincide with the rotation plane of the EUT.

b) EUT must be placed in a state with carrier wave, with the carrier wave at the lowest possible central frequency.

c) EUT must be rotated 360°, unwanted emissions are measured by frequency and amplitude over the frequency range from 30 MHz to 1,000 MHz. Record the frequency and amplitude of each signal.

d) The measurements must be repeated with the measurement antenna in the opposite polarization, and the similar signal level is recorded.

e) The steps as in c) and d) above will be repeated when the EUT carrier wave is at the highest possible central frequency.

f) The steps as in c) and d) above will be repeated when there is no carrier wave.

g) The steps from b) to f) above will be repeated with EUT rotated so that the axis of rotation is orthogonal to the first case, as shown in Figure 2. The EUT antenna adjustment axis must be maintained within the plane of rotation.

h) The steps from b) to f) above will be repeated with EUT rotated so that the axis of rotation is orthogonal to the two previous cases, as shown in Figure 3. The EUT antenna adjustment axis must be perpendicular to the plane of rotation.

3.1.4.3. Measurements at frequencies above 1,000 MHz

For MES where measurements on the antenna flange cannot be performed or the manufacturer does not agree, EUT must be tested with antennas. The testing must be carried out in two stages:

- Procedure a: Determine the important frequencies of unwanted emission radiation.

- Procedure b: Measure the power levels of the unwanted emissions determined.

For MES where measurements can be performed on the antenna flange and the manufacturer agrees, EUT must be tested without antennas. The testing must be carried out in three stages:

- Procedure a): determine the important frequencies of unwanted emission radiation;

- Procedure b): measure the power levels of the unwanted emissions determined;

- Procedure c): measure unwanted conducted emissions.

1. Determining the important frequencies of unwanted emission radiation

a) Arrange the measurement setup as in Figure 1 with the receiving test equipment being a spectrum analyzer. Adjust the EUT antenna so that the antenna adjustment axis lies in the plane of rotation. The axis of the antenna to be measured must coincide with the plane of the EUT's adjustable antenna.

b) EUT must be placed in a state with carrier wave, with the carrier wave at the lowest possible central frequency.

c) EUT must be rotated 360°, unwanted emissions are measured by frequency and amplitude over the frequency range from 1,000 MHz to 40 GHz. Record the frequency and amplitude of each signal.

d) The measurements must be repeated with the measurement antenna in the opposite polarization, and the similar signal level is recorded.

e) The steps as in c) and d) above will be repeated when the EUT carrier wave is at the highest possible central frequency.

f) The steps as in c) and d) above will be repeated when there is no carrier wave.

g) The steps from b) to f) above will be repeated with EUT rotated so that the axis of rotation is orthogonal to the first case, as shown in Figure 2. The EUT antenna adjustment axis must be maintained within the plane of rotation.

h) The steps from b) to f) above will be repeated with EUT rotated so that the axis of rotation is orthogonal to the two previous cases, as shown in Figure 3. The EUT antenna adjustment axis must be perpendicular to the plane of rotation.

2. Measuring the power levels of the determined unwanted emissions

Figure 4 - Diagram for measuring unwanted emissions of EUT with antenna

a) Measurement diagram as in Figure 4 or Figure 5.

b) EUT must be in a state with carrier wave, with the carrier wave center frequency modulated appropriately for the previously determined unwanted emissions.

c) The measurement antenna must be adjusted in height and EUT rotated to obtain the maximum response on the spectrum analyzer at each identified unwanted emission, this response must be recorded.

d) The measurement diagram as in Figure 1 must be repeated with the measurement antenna oriented in the orthogonal polarization direction and the similar response recorded.

e) EUT is replaced with a substitute antenna, which is connected to the signal generator. The main boresight axes of the measurement antenna and the substitute antenna must be aligned.

f) The polarization of the measurement antenna and the substitute antenna must be aligned similarly to achieve the maximum response between EUT and the measurement antenna according to steps c) and d).

g) The output signal of the signal generator must be adjusted so that the received level equals the maximum unwanted emission level previously recorded.

h) Record the output level of the signal generator. The EIRP of the unwanted emission equals the sum of the signal generator output signal plus the maximum isotropic gain of the substitute antenna minus the cable loss, expressed in dB.

Figure 5 - Diagram for measuring unwanted emissions of EUT without antenna

3. Measuring unwanted conducted emissions at the antenna flange

Measurement procedure:

HìFigure 6 - Diagram for measuring unwanted conducted emissions

a) Measurement diagram as in Figure 6. A bandstop filter with a frequency set equal to the carrier wave frequency must be used to protect the spectrum analyzer while ensuring the accuracy of the measurement, especially near the carrier wave frequency.

b) The frequency range from 1,000 MHz to 40 GHz must be considered for checking unwanted emissions in the carrier wave state at the highest power level and standard modulation. The density of unwanted emission power must be measured.

c) To obtain the maximum EIRP, the maximum gain of the measurement antenna at the identified unwanted emission frequency must be added to the measured power density and correction factors applied to the result. If agreed by the manufacturer, it may be accepted with the maximum antenna gain measured according to 3.4.3.2 used instead of the maximum antenna gain at the identified unwanted emission frequency.

d) The measurements must be repeated in the state without carrier wave.

3.2. Unwanted emissions in table

3.3.2. Static directional antenna rms accuracy

For testing, EUT includes:

a) For IE:

- EME;

- IME;

- Connection cables between the IME and EME systems;

- Necessary power cables and other types of cables to ensure proper operation of the terminal equipment.

b) For PE:

- A PE module, this module includes auxiliary devices to allow normal operation configuration;

- Multiple PE modules, all modules with all necessary connecting cables provided by the manufacturer including auxiliary devices to allow normal system operation.

The distance between EUT or substitute antenna and measurement antenna must ensure that the near-field radiations of each antenna do not overlap. The larger near-field radiation of EUT and substitute antenna is used to determine the minimum distance between EUT and measurement antenna in the first case.

3.2.1.1. General requirements

For MES where testing can be performed on the antenna flange and agreed by the manufacturer, the measurements are performed on the antenna flange.

For MES where testing cannot be performed on the antenna flange or not agreed by the manufacturer, the measurements are performed with the measurement antenna.

3.2.1.2. Measurement method on the antenna flange

a) Measurement diagram as in Figure 7.

b) Test in the frequency range from 14.00 GHz to 14.25 GHz. For the carrier wave state, the measurement shall not be performed within the defined bandwidth. The measurement must be performed during the transmission of the modulated carrier wave at maximum power. The carrier wave frequency should be as close as possible to the lower limit of the EUT operating frequency range.

c) The resolution bandwidth of the spectrum analyzer must be set to the measurement bandwidth specified or as close as possible. If the resolution bandwidth differs from the specified measurement bandwidth, broadband noise signal calibration must be performed.

d) To obtain the unwanted emission power level on the axis transmitted, the gain of the isotropic antenna must be added to each measurement result, and correction factors must be included in the results.

Figure 7 - Diagram for measuring unwanted emissions on the axis at the antenna flange

e) The antenna gain is measured according to Article 3.4.3.2.

f) Steps b) through e) must be repeated in the absence of carrier waves.

g) Steps b) to f) must be repeated at a transmission frequency near the upper limit of the operating band of the EUT.

3.2.1.3. Antenna Measurement Method

a) Measurement setup as shown in Figure 8.

b) Test in the frequency range from 14.00 GHz to 14.25 GHz. For the carrier wave state, the measurement shall not be performed within the defined bandwidth. The measurement must be performed during the transmission of the modulated carrier wave at maximum power. The carrier wave frequency should be as close as possible to the lower limit of the EUT operating frequency range.

c) The resolution bandwidth of the spectrum analyzer must be set to the measurement bandwidth specified or as close as possible. If the resolution bandwidth differs from the specified measurement bandwidth, broadband noise signal calibration must be performed.

d) The EUT must be installed with other systems, which are placed in their normal operating positions. Non-metallic devices must hold the connecting cables at a height between 0.5 m and 1.0 m.

e) The measurement antenna height is adjusted and the EUT is rotated to achieve maximum response on the related spectrum analyzer for each identified unwanted emission, recording this response level.

f) The measurement antenna height and polarization are adjusted and the EUT is rotated to achieve maximum response on the related spectrum analyzer for each previously identified unwanted emission, recording this response level.

g) The EUT is replaced by a substitute antenna. This antenna is connected to the signal generator. The main boresight axes of the measurement antenna and the substitute antenna must be aligned.

h) The polarization of the measurement antenna and the substitute antenna must be aligned similarly to create the largest response between the EUT and the measurement antenna, in steps e) and f).

i) The output signal of the signal generator must be adjusted so that the received level equals the highest previously recorded noise level.

j) Record the output level of the signal generator. The EIRP of the off-axis noise emission is the sum of the signal generator output level and the isotropic antenna gain of the substitute antenna minus the cable loss, expressed in dB.

k) Steps d) to j) must be repeated in the absence of carrier waves.

Figure 8 - Diagram for measuring off-axis emissions using a measurement antenna đough diagram for measuring off-axis emissions using a measurement antenna

3.3.3. Off-axis EIRP measurement without antenna

3.3.4. Off-axis EIRP measurement with antenna

Compliance is determined from:

a) Measuring the static directional antenna accuracy rms;

b) Measuring off-axis EIRP.

Off-axis EIRP measurement can be conducted whether the EUT has or does not have an antenna:

- For MES when the measurement can be performed at the antenna flange and with the manufacturer's consent. The measurement must be carried out in three stages:

a) Measure the output power density of the transmitter (dBW/40 kHz);

b) Measure the antenna transmit gain (dBi);

c) Measure the transmit radiation pattern of the antenna (dBi).

- For MES when the measurement cannot be performed at the antenna flange or without the manufacturer's consent, the EUT is equipped with an antenna. The measurement must be carried out in three stages:

a) Measure the ratio of maximum EIRP over 40 kHz to EIRP (dBc/40 kHz);

b) Measure the maximum on-axis EIRP (dBW);

c) Measure the transmit radiation pattern of the antenna (dBi).

3.4. Control and monitoring

Measurement method

Figure 9 - Diagram for measuring static directional antenna accuracy rms

a) The equipment is arranged as shown in Figure 9, two antennas are located far apart from each other with the EUT rotated away from the STE. Close the STE circuit and open the EUT circuit.

b) The signal level emitted from the STE will be adjusted so that the EUT receives a power density corresponding to the signal-to-noise ratio published by the manufacturer. This power density is expected to be 95% of the MES in the system and usually exceeds 2 dB above the edge of the MES coverage area designed for operation.

c) Close the EUT circuit and allow for obtaining the static directional position.

d) Static directional accuracy is measured and recorded. The measurement methods used will be agreed upon between the manufacturer and the testing laboratory.

e) Static directional accuracy is monitored to determine if a change in direction occurs, measure the rms value of this directional angle if there is a change.

f) Static directional accuracy is measured five times.

g) Open the EUT circuit while rotating the EUT by at least 90° and for a minimum time of 1 second.

h) Repeat the measurement steps from c) to f).

i) The value of the static directional accuracy rms is the highest value among the 10 recorded measurement results.

3.4.1. Measurement diagram

3.3.3.1. Output Power Density

For testing, the EUT includes all devices mounted on the antenna flange:

a) For IE:

- EME;

- IME;

- Connection cables between the IME and EME systems;

- Necessary power cables and other types of cables to ensure proper operation of the terminal equipment.

b) For PE:

- A PE module, this module includes auxiliary devices to allow normal operation configuration;

- Multiple PE modules, all modules with all necessary connecting cables provided by the manufacturer including auxiliary devices to allow normal system operation.

In cases where the EUT is designed to connect directly to the antenna flange or to a point provided by the manufacturer as a substitute for the MES test device.

Measurement method:

Figure 10 - Diagram for measuring output power density

a) The EUT is connected to the test load as shown in Figure 10.

b) For carrier waves modulated by a pseudo-random bit sequence, the maximum power density provided to the antenna flange must be calculated in dBW/40 kHz. The measurement coupler's coupling factor at the measurement frequency and waveguide adapter loss must be considered. The resolution bandwidth of the spectrum analyzer should be set as close as possible to the specified measurement bandwidth. If the resolution bandwidth differs from the specified measurement bandwidth, bandwidth calibration must be performed.

3.3.3.2. Antenna Transmit Gain

1. General Requirements

In this standard, the antenna transmit gain is defined as the ratio in dB of the power supplied to a reference antenna, such as an isotropic radiator in free space, to the power supplied to the antenna under consideration, so that they produce the same field strength at the same distance in the same direction. Unless otherwise noted, the gain is considered for the direction of maximum radiation.

In this measurement, the EUT is considered part of the MES including the antenna and the antenna flange. The EUT consists of an electrical unit containing the antenna feed (see 3.4.3.1).

2. Measurement Position

The measurement is conducted at an outdoor far-field position or at a reduced near-field position. However, if near-field scanning technology converts near-field measurements into far-field results proven to be sufficiently accurate for both test positions, antenna measurements may be performed in the near-field.

3. Measurement Method

Figure 11 - Diagram for measuring antenna transmit gainamendng diagram for measuring antenna transmit gain

a) As shown in Figure 11, the EUT is connected to the measurement receiver. A signal proportional to the position of the rotational angle from the motion mechanism/servo must be fed into the X-axis, and the signal level from the measurement receiver must be fed into the Y-axis of the plotter.

b) The signal generator emits a measurement signal on the E plane of the first antenna through a horizontally polarized antenna. The main axis of the EUT antenna must be aligned with the main axis of the signal generator antenna. The EUT antenna or its polarizer must be rotated and adjusted so that the E plane coincides with the E plane of the signal generator antenna.

c) When there is a change in the E plane of the test signal, the EUT antenna must be rotated around its main axis so that its E plane aligns with the E plane of the signal generator.

d) The frequency of the measurement signal is set at 5 MHz within the lowest frequency band published by the manufacturer.

e) The EUT must be adjusted to obtain the maximum received signal strength, and the X-Y plotter must be adjusted to achieve the highest reading value on the graph.

f) The EUT must be moved azimuthally by an angle of 10°.

g) The diagram obtained when moving the EUT azimuthally in the opposite direction (from the initial point) by 10°, with the plotter recording the results.

h) The EUT is replaced with a substitute antenna having the highest received signal strength.

i) This received level is recorded on the X-Y plotter.

j) The substitute antenna must be rotated azimuthally as in steps f) and g).

k) The gain of the EUT is calculated as follows:

of_EUT = L₁ -₂ ĐMT

With G_EUT: Gain of the EUT (dBi);

L₁: Level obtained with the EUT (dB);

L₂: Level obtained with the substitute antenna (dB);

C: Standard gain of the substitute antenna at the measurement frequency (dBi).

l) Steps e) to k) are repeated with frequency changes between the lowest bands published by the manufacturer.

m) Steps e) to k) are repeated with frequency changes up to 5 MHz within the lowest band published by the manufacturer.

n) Steps d) to m) may be performed simultaneously.

o) Steps c) to n) must be repeated with the E plane vertical.

p) Steps c) to n) must be repeated with the E plane at +45° relative to the horizontal plane.

q) Steps c) to n) must be repeated with the E plane at -45° relative to the horizontal plane.

r) Steps b) to q) will be repeated for all frequency bands published by the manufacturer.

3.3.3.3. Radiation Pattern of the Antenna

1. General Requirements

In this standard, the radiation pattern of the antenna is a diagram showing the relationship between field intensity and angular orientation by the antenna at a constant distance from the antenna.

In this measurement, the EUT is considered part of the MES consisting of the antenna and flange. The antenna includes: reflector(s), feed, struts, and an electrical equipment compartment with the feed placed at the focal point of the antenna (see 3.4.3.1).

2. Measurement Position

The measurement is conducted at an outdoor far-field position or at a reduced near-field position. However, if near-field scanning technology converts near-field measurements into far-field results proven to be sufficiently accurate for both test positions, antenna measurements may be performed in the near-field.

3. Measurement Method

a) As shown in Figure 12, the EUT is connected to the measurement receiver. A signal proportional to the position of the rotational angle from the motion mechanism/servo must be fed into the X-axis, and the signal level from the measurement receiver must be fed into the Y-axis of the plotter.

Figure 12 - Measurement Diagram for the Antenna Radiation Patterno measurement instrumentn lfor antenna radiation emission

b) The signal generator emits a measurement signal on the E plane of the first horizontally polarized antenna. The main axis of the EUT antenna must be aligned with the main axis of the signal generator antenna. The EUT antenna or its polarizer must be rotated and adjusted so that the E plane coincides with the E plane of the signal generator antenna.

c) When there is a change in the E plane of the test signal, the EUT antenna must be rotated around its main axis so that its E plane aligns with the E plane of the signal generator.

d) The frequency of the measurement signal is set at 5 MHz within the lowest frequency band published by the manufacturer.

e) The EUT must be adjusted to obtain the maximum received signal strength, and the X-Y plotter must be adjusted to achieve the highest reading value on the graph.

f) The EUT must be moved azimuthally by 180°.

g) The emission pattern diagram is obtained when moving the EUT azimuthally by 360°, with the plotter recording the results.

h) Steps c) to g) are repeated with frequency changes between the lowest bands published by the manufacturer.

i) Steps c) to g) are repeated with frequency changes up to 5 MHz within the lowest band published by the manufacturer.

j) Steps c) to i) may be performed simultaneously.

k) Steps c) to j) must be repeated with the E plane vertical.

l) Steps c) to j) must be repeated with the E plane at +α° relative to the vertical plane. α° is defined as the worst-case angle between the horizontal plane and the geostationary orbit latitude as stated by the manufacturer.

m) Steps c) to j) must be repeated with the E plane at -α° relative to the horizontal plane, α° being defined in step I).

n) Steps c) to m) will be repeated for all frequency bands published by the manufacturer.

3.3.3.4. Calculation of Results

The results must be calculated by applying a "mask" with limits specified according to the reference level, which is the sum of the output power density and the antenna gain. This reference level must be set at the peak of the diagrams obtained from measuring the emission patterns, to ensure that the off-axis EIRP density falls within the mask, meeting technical requirements.

3.4.2. Processor monitoring

3.3.4.1. General Requirements

Apply the requirements from Article 3.2.1 to 3.2.3.1.2 for measurements above 1 GHz.

3.3.4.2. Maximum EIRP Density Over 40 kHz Relative to EIRP

For the measurement, the EUT must be a MES with an antenna.

Measurement method:

a) As shown in Figure 13, two antennas face each other.

b) The carrier wave is modulated by a random bit sequence. Transmission will be continuous where possible.

c) The resolution bandwidth of the spectrum analyzer must be set larger but as close as possible to the occupied bandwidth of the transmitted signal. The total power P1 received is measured in dBW.

d) The resolution bandwidth of the spectrum analyzer must be set equal to the specified measurement bandwidth of 40 kHz or as close as possible. If the resolution bandwidth differs from the specified measurement bandwidth, a bandwidth correction must be made. The maximum value P2 is the received power at 40 kHz within the occupied bandwidth, measured in dBW.

e) The maximum EIRP density over 40 kHz relative to EIRP (dBc/40 kHz) is (P1 - P2).

Figure 13 - Measurement Diagram for Radiated Power Density

3.3.4.3. Maximum EIRP on Axis

1. General Requirements

To perform the measurement, the EUT must be a MES with an antenna.

The distance between EUT or substitute antenna and measurement antenna must ensure that the near-field radiations of each antenna do not overlap. The larger near-field radiation of EUT and substitute antenna is used to determine the minimum distance between EUT and measurement antenna in the first case.

2. Measurement Position

The measurement is conducted at an outdoor far-field position or at a reduced near-field position. However, if near-field scanning technology converts near-field measurements into far-field results proven to be sufficiently accurate for both test positions, antenna measurements may be performed in the near-field.

3. Measurement Method

a) As shown in Figure 14, two antennas face each other. A signal proportional to the position of the rotational angle from the motion mechanism/servo must be fed into the X-axis, and the signal level from the measurement receiver proportional to the received power (dBW) must be fed into the Y-axis of the plotter.

b) EUT transmits carrier waves at maximum power and modulated by a pseudo-random bit sequence. Transmission is continuous when possible.

c) The bandwidth resolution of the spectrum analyzer is set larger but as close as possible to the bandwidth occupied by the transmitted signal.

d) The signal radiation is measured on the first E plane of EUT through its horizontal polarized antenna. The main axis of the receiving antenna's parabolic reflector must be aligned with the main axis of EUT's antenna parabolic reflector. The receiving antenna or its polarizer must be rotated and adjusted so that its E plane coincides with EUT's E plane.

Figure 14 - Diagram for measuring EIRP on the maximum axis

e) When changing the E plane of the test signal, the receiving antenna must be rotated around its main axis so that its E plane coincides with EUT's E plane.

f) The frequency of the measured signal is set to 5 MHz within the lowest frequency band published by the manufacturer.

g) EUT must be adjusted to achieve the largest received signal and the X-Y recorder must be adjusted to obtain the highest reading value on the graph.

h) EUT must be moved azimuthally by an angle of 10°.

i) The diagram measurement is obtained when EUT is moved in the opposite direction (from the initial point) by an azimuthal angle of 10°, the recorder records the results.

j) EUT must be replaced by a signal generator connected to a calibrated antenna (substitute antenna), transmitting carrier waves at the frequency band of EUT's carrier wave. The received signal level must be the largest.

k) This received level is recorded on the X-Y recorder.

l) The signal generator with the substitute antenna must be rotated in the azimuthal angle as in steps h) and i).

m) The EIRP of the signal radiated from EUT is calculated as follows:

EIRP_EUT = L1 - L2 + G + P

Where:

- EIRP_EUT is the EIRP of the signal radiated from EUT (dBW) in the considered direction;

- L1 is the received level with EUT (dBW) in the same considered direction;

- L2 is the received level with the signal generator's substitute antenna (dBW);

- G is the calibrated gain of the substitute antenna at the measurement frequency (dBi);

- P is the generated power by the signal generator at the antenna substitute flange (dBW).

n) Steps g) to m) are repeated with frequency changes between the lowest frequency bands published by the manufacturer.

o) Steps g) to m) are repeated with frequency changes up to 5 MHz within the lowest frequency band published by the manufacturer.

p) Steps g) to o) may be performed simultaneously.

q) Steps g) to p) must be repeated with the E plane vertical.

r) Steps g) to p) must be repeated with the E plane at +45° relative to the horizontal plane.

s) Steps g) to p) must be repeated with the E plane at -45° relative to the horizontal plane.

t) Steps g) to s) will be repeated for all frequency bands published by the manufacturer.

u) The EIRP on the maximum axis of the signal radiated by EUT is the maximum value calculated according to step m).

3.3.4.4. Radiation Pattern of the Antenna

1. General Requirements

In this standard, the radiation pattern of the antenna is a diagram showing the relationship between field strength and directional angle by the antenna at a fixed distance from the antenna.

For the measurement, the EUT must be a MES with an antenna.

The distance between EUT or substitute antenna and the measuring antenna must ensure that the near-field radiation of each antenna does not overlap. The larger near-field radiation of EUT and substitute antenna is used to determine the minimum distance between EUT and measuring antenna in the first case.

2. Measurement Position

Measurement is conducted at the far-field measurement location outdoors or at a reduced measurement distance. However, if near-field scanning technology converts near-field measurements into far-field results proven to be sufficiently accurate for both test positions, antenna measurement can be performed in the near-field.

3. Measurement Method

a) As shown in Figure 15, two antennas face each other. A signal proportional to the position of the rotation angle from the motion mechanism/servo must be fed into the X-axis, and the received signal level from the measuring receiver proportional to the received power (dBW) must be fed into the Y-axis of the recorder.

b) EUT transmits carrier waves modulated by a pseudo-random bit sequence. Transmission is continuous when possible.

c) The bandwidth resolution of the spectrum analyzer is set larger but as close as possible to the bandwidth occupied by the transmitted signal.

d) The signal radiation is measured on the first E plane of EUT through its horizontal polarized antenna. The main axis of EUT's antenna parabolic reflector must be aligned with the main axis of EUT's antenna parabolic reflector. The receiving antenna or its polarizer must be rotated and adjusted so that its E plane coincides with EUT's E plane.

Figure 15 - Diagram for measuringn lfor antenna radiation emission

e) When changing the E plane of the test signal, the EUT antenna must be rotated around its main axis so that its E plane coincides with the E plane of the measuring transmitter.

f) The frequency of the measured signal is set to 5 MHz within the lowest frequency band published by the manufacturer.

g) EUT must be adjusted to achieve the largest received signal and the X-Y recorder must be adjusted to obtain the highest reading value on the graph.

h) EUT must be moved azimuthally by an angle of 180°.

i) The diagram measurement is obtained when EUT is moved in the opposite direction (from the initial point) by an azimuthal angle of 360°, the recorder records the results.

j) Steps g) to i) are repeated with frequency changes between the lowest frequency bands published by the manufacturer.

k) Steps g) to i) are repeated with frequency changes up to 5 MHz within the lowest frequency band published by the manufacturer.

l) Steps g) to k) may be performed simultaneously.

m) Steps e) to I) must be repeated with the E plane vertical.

n) Steps e) to I) must be repeated with the E plane at +α° relative to the horizontal plane. α° is defined as the worst-case angle between the horizontal plane and the geostationary orbit latitude as declared by the manufacturer.

o) Steps e) to I) must be repeated with the E plane at -α° relative to the horizontal plane, α° is defined as in n).

p) Steps e) to o) will be repeated for all frequency bands published by the manufacturer.

3.3.4.5. Calculation of Results

The results must be calculated by applying a "mask" with limits specified by the reference level, which is the sum of the maximum EIRP of the machine, the ratio between EIRP/40 kHz density and EIRP, and twice the static directional accuracy rms. This reference level must be placed at the peak of the diagrams obtained from the radiation pattern measurement, to confirm that the off-axis EIRP density falls within the mask, meeting technical requirements.

3.4.3. Transmission subsystem monitoring

If the EUT is a MES that has been adjusted by the manufacturer to perform these measurements with full documentation proving accurate simulation of the required measurement conditions.

To perform these measurements, the EUT is a MES with or without antennas.

The EIRP power density measurement must be limited within the defined bandwidth range or 10 MHz bandwidth centered at the carrier frequency, whichever is larger.

3.4.4. Power off

Measurement setup as shown in Figure 16 or Figure 17. The EUT must be allowed to transmit and must be in the "transmit enabled" state when each measurement begins. Except for other states, the two-trace memory oscilloscope must monitor and measure the time difference between commands or failures and the occurrence of desired events (e.g., transmission cessation). The power meter and spectrum analyzer must display the output level of the EUT.

Figure 16 - General measurement setup for monitoring and control measurements for transmission measurements

Figure 17 - General measurement setup for monitoring and control measurements for radiation measurements

3.4.5. Control channel reception (CC)

Measurement method:

a) Each processor in the EUT is sequentially caused to fail.

b) Within one second from the failure, the EUT must stop transmitting (observed on the spectrum analyzer).

c) The power meter and spectrum analyzer must be observed to ensure that the transmission has ceased.

d) The failed processor must be restored to normal operating condition and the EUT must automatically return to normal operating condition before causing the next processor to fail.

3.4.6. Network control commands

Measurement method:

a) The frequencies of the subsystems must be caused to fail regarding:

1) Frequency stability;

2) Output.

b) Within six seconds of the failure, the EUT must stop transmitting (observed on the spectrum analyzer).

c) The power meter and spectrum analyzer must be observed to ensure that the transmission has ceased.

d) The failed components must be restored to normal operating condition and the EUT must return to normal operating condition before causing further failure.

3.4.7. Preamble transmission

Measurement method:

a) Turn off the EUT and STE does not transmit the control channel;

b) Turn on the EUT;

c) The EUT must not transmit during and after power-on and must switch to the no-carrier state.

Events from a) to c) must be displayed and confirmed by the oscilloscope and transmission signal measurement. If there is a manual power-off function, the following measurements must be performed:

d) Turn on the EUT and STE transmits the control channel;

e) A call will be initiated from the EUT and the EUT must switch to the carrier state;

f) Initiate the power-off function;

g) The EUT must switch to the no-carrier state.

Events from e) to g) must be displayed and confirmed by the oscilloscope and transmission signal measurement.

3.5. Off-axis antenna gain pattern

Measurement method:

The following measurements are performed:

- The EUT does not receive the control channel;

- The EUT loses the control channel during the call period;

- The EUT loses the control channel during the non-transmission period;

- The EUT loses the control channel and a call is initiated during the T1 waiting period.

The waiting period T1 used in these measurements is 30 seconds.

a) The EUT does not receive the control channel:

a1) Turn off the EUT and STE does not transmit the control channel;

a2) Turn on the EUT;

a3) Initiate a call from the EUT;

a4) The EUT must maintain the no-carrier state.

Events from a1) to a4) must be displayed and confirmed by the oscilloscope and transmission signal measurement.

b) The EUT loses the control channel during the call period:

b1) The EUT and STE must be turned on and STE must transmit the control channel;

b2) Initiate a call from the EUT;

b3) STE must stop transmitting the control channel;

b4) During the T1 waiting period from b3), the EUT must switch to the no-carrier state.

Events from b2) to b4) must be displayed and confirmed by the oscilloscope and transmission signal measurement.

c) The EUT loses the control channel during the non-transmission period:

c1) Turn on the EUT and STE transmits the control channel;

c2) STE stops transmitting the control channel;

c3) After the T1 period, initiate a call from the EUT;

c4) The EUT must maintain the no-carrier state.

Events from c2) to c4) must be displayed and confirmed by the oscilloscope and transmission signal measurement.

d) In the case where the control channel is lost by the EUT and a call is initiated during the T1 period:

d1) The EUT and STE must be turned on and STE must transmit the control channel;

d2) STE must stop transmitting the control channel;

d3) During the T1 period from step d2), the EUT initiates a transmission request;

d4) The EUT may transmit but during the T1 period, the EUT must switch to the no-carrier state.

Events from d2) to d4) must be displayed and confirmed by the oscilloscope and transmission signal measurement.

3.5.1. Measurement location

Measurement method:

The following measurements must be performed in sequence:

- Permission to transmit command;

- Prohibition to transmit command;

- Identification/request.

a) Permit-to-transmit command:

a1) The EUT and STE must be turned on and STE will transmit the control channel;

a2) The EUT must switch to the no-carrier state;

a3) The EUT initiates a call, the EUT must maintain the no-carrier state;

a4) STE must transmit a permit-to-transmit command to the EUT;

a5) The EUT initiates a call.

a6) The EUT must switch to the carrier state and must transmit.

Events from a2) to a6) must be displayed and confirmed by the oscilloscope and transmission signal measurement.

b) Prohibit-to-transmit command:

b1) Continue from step a6);

b2) STE must transmit a prohibit-to-transmit command to the EUT;

b3) The EUT must switch to the no-carrier state within one second;

b4) The EUT initiates a call;

b5) The EUT must maintain the no-carrier state;

b6) STE must transmit a permit-to-transmit command;

b7) The EUT initiates a call;

b8) The EUT must switch to the carrier state and must transmit;

b9) The EUT terminates the call.

Events from b2) to b9) must be displayed and confirmed by the oscilloscope and transmission signal measurement.

c) Identification request:

c1) Continue from step b9);

c2) STE will transmit an identification request;

c3) The EUT must switch to the carrier state and will transmit its identification code.

The EUT sends the identification code displayed on the STE.

3.5.2. Measurement method

Measurement method:

a) Turn off the EUT and STE transmits the control channel;

b) The EUT must be turned on;

c) The EUT must not transmit, except for the initial burst, if present;

d) Each initial burst must not exceed one second, and the initial burst transmission must not exceed one percent of the time.

Events from b) to d) must be displayed and confirmed by the oscilloscope and transmission signal measurement.

3.6. Blocking performance

3.7. Adjacent channel selectivity

The measurement is conducted at the far-field outdoor measurement location or at a reduced measurement distance. However, if near-field scanning technology converts near-field measurements into far-field results proven to be sufficiently accurate for both test positions, antenna measurements can be performed in the near-field. Fully automatic systems can be used for tests providing results that can be proven to be accurate, provided they are carried out according to the specified method.

6. T

Figure 18 - Diagram đo - the diagram measurement of the antenna reception pattern

a) The measurement setup as shown in Figure 18, the EUT is connected to the receiver.

b) A signal proportional to the position of the angle from the movement mechanism/servo must be fed into the X-axis and the signal level from the receiver must be fed into the Y-axis of the recorder.

c) The measurement frequency must be the center frequency of each band applied. Plane E must be placed vertically.

d) The EUT must be adjusted to have the maximum received signal level and the X-Y recorder must be adjusted to have the highest reading value on the chart.

e) The EUT must be moved through an azimuth angle of 180°.

f) The transmission pattern diagram is obtained when moving the EUT through an azimuth angle of 360°, the recorder records the results.

g) Steps from b) to e) must be repeated with the frequency changed down to the lower limit of the band applied as published by the manufacturer.

h) Steps from b) to e) must be repeated with the frequency changed up to the upper limit of the band applied as published by the manufacturer.

i) Steps from b) to h) must be repeated with the frequency changed according to other specifications in the device design but not necessarily performed simultaneously in all bands.

j) Steps from b) to h) must be repeated with the test signal transmitted in plane H instead of plane E.

k) Steps from b) to h) must be repeated with the test signal transmitted in a plane at 45° relative to plane H.

l) Steps from b) to h) must be repeated with the test signal transmitted in a plane at 90° relative to the plane in k).

m) Steps from b) to I) will be repeated between angles φr and 7° with the EUT rotated 90° or the measuring antenna or the auxiliary polarization systems of the EUT rotated 90° to provide cross-polarization measurements.

6.5.1.3 Calculation

The calculation of the results is carried out by creating a "mask" with limits defined according to the reference level calculated based on the antenna gain. This reference level must be set at the peak point of the diagrams obtained from the diagram measurements.

QCVN 116:2017/BTTTT is based on the European Telecommunications Standards Institute standard ETSI EN 301 427 V2.1.1 (2016-06).

Measurement method

a) The output signals of the two signal generators will be combined with equal weighting. The combined signals must be properly and appropriately combined with the LNB inputs.

b) A spectrum analysis must be connected to the LNB output to provide LNB power.

c) f_{specialized agency under the People's Committee of the province/city.} is the center frequency of the receiving band.

d) The first signal of the generator frequency will be set as f_{specialized agency under the People's Committee of the province/city.}.

e) The first signal level of the generator must be set to a level within the operational input range of the LNB.

f) The spectrum analyzer is set to measure the first converted signal level at the LNB output.

g) The second signal of the generator frequency must be set as f_{specialized agency under the People's Committee of the province/city.} - 20 MHz.

h) The second signal level of the generator must be adjusted so that the measured level is 1 dB lower than without the second signal.

i) The second signal level of the generator must be recorded as the reference level.

j) The second signal of the generator frequency must be set to the frequency of interest.

k) The second signal level of the generator must be adjusted so that the measured level is 1 dB lower than without the second signal.

l) The rejection of the frequency of interest is equal to the second signal level of the generator minus the reference level determined in step i).

m) Steps from j) to I) must be repeated with frequencies within the range of Table 3.

NOTE: The worst-case rejection in a specific frequency band can be determined after step i) by sweeping the second signal generator frequency across the band and observing the gain, then performing steps from j) to I) with the frequency having the highest gain.

QCVN 116:2017/BTTTT was drafted by the Post and Telecommunications Engineering Science Institute, reviewed by the Science and Technology Department, and issued by the Ministry of Information and Communications pursuant to Circular No. 29/2017/TT-BTTTT dated November 7, 2017.

Measurement method

a) Use two signal generators. Each signal generator must produce a modulated signal within the IME input frequency range and thermal noise.

b) The signal generators are connected to the IME input via a splitter (combiner).

c) The test signal generators must be set to the frequency and level according to Table 4.

d) The IME must be set to receive the signal of the first test signal generator.

e) The second test signal generator is set to the off signal.

f) The noise level (or signal-to-noise ratio) of the first test signal generator must be varied to determine the standard threshold sensitivity.

g) The second signal generator is set to the on signal.

h) The noise level (or signal-to-noise ratio) of the first test signal generator must be varied to determine the standard threshold sensitivity.

i) The reduction in noise level (or signal-to-noise ratio) determined in step h) minus the noise level (or signal-to-noise ratio) determined in step f).

j) The highest reduction is found.

5. RESPONSIBILITIES OF ORGANIZATIONS AND INDIVIDUALS

4.1. Mobile ground station equipment within the scope regulated by Article 1.1 must comply with the technical requirements specified in this standard.

4.2. Organizations and individuals are permitted to use the testing results of laboratories recognized according to ISO/IEC 17025 for the requirements of Article 2.2.3 to implement conformity certification and declaration. Testing for other technical requirements of the standard (except Article 2.2.3) to implement conformity certification and declaration must be conducted in accordance with current regulations.

5. RESPONSIBILITIES OF ORGANIZATIONS AND INDIVIDUALS

Relevant organizations and individuals are responsible for implementing regulations on conformity certification and declaration of mobile ground station equipment operating in the Ku band and subject to state management agency inspections according to current regulations.

6. IMPLEMENTATION ORGANIZATION

6.1. The Telecommunications Authority and Provincial Departments of Information and Communications are responsible for guiding and organizing the implementation of equipment management in compliance with this standard.

6.2. In cases where the provisions set forth in this Standard are changed, supplemented, or replaced, they shall be implemented according to the new document.

6.3. During the implementation of this standard, if there are issues or difficulties arising, relevant organizations and individuals should report them in writing to the Ministry of Information and Communications (Science and Technology Department) for guidance and resolution.

 

TABLE OF REFERENCES体制机制物质技术条件、人力资源报告（根据2016年7月1日第105/2016/NĐ-CP号政府决议附表02规定，该决议对计量器具和测量标准的检定、校准、检测活动条件进行了规定，并经2018年第154/2018/NĐ-CP号决议第二条第十二条修正）[1] EBU Tech 3205-E The EBU Standard peak-programme meter for the control of international transmissions.

[1] ETSI EN 301 427 V2.1.1 (2016-06): "Satellite Earth Stations and Systems (SES): Harmonized EN for Low data rate Mobile satellite Earth Stations (MES) except aeronautical mobile satellite earth stations, operating in the 11/12/14 GHz frequency bands covering essential requirements under article 3.2 of the R&TTE directive".