JJG 1024-2007 Pulse Power Meter Verification Procedure JJG1024-2007 Standard download decompression password: www.bzxz.net
This procedure is applicable to the initial verification, subsequent verification and in-use inspection of various pulse power meters.

National Metrology Verification Regulation of the People's Republic of China JJG1024—2007
Pulse Power Meters
OMMEMKMP
Promulgated on 2007-02-28
Implementation on 2007-05-28
Promulgated by the General Administration of Quality Supervision, Inspection and Quarantine JJG1024—2007
Verification Regulation of
Pulse Power Meters
JJG1024—2007
This regulation was approved by the General Administration of Quality Supervision, Inspection and Quarantine on February 28, 2007, and came into effect on May 28, 2007.
Responsible unit: National Radio Metrology Technical Committee Drafting unit: 203 Institute of the Second Academy of China Aerospace Science and Industry Corporation This regulation entrusts the National Radio Metrology Technical Committee to be responsible for the interpretation of this regulation Drafting person:
JJG1024—2007
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Yang Xujun (Institute 203, Second Academy of China Aerospace Science and Industry Corporation) Xu Chuanzhong (Institute 203, Second Academy of China Aerospace Science and Industry Corporation) 9a69
Siyekou S Pingyuan General Creation of Austrian National Finance
All-China National Construction
Adjustment of the country's single grass
Special tool will be handed over to this branch of the most electrical and electronic heavenly country full service teaching scope
Overview
3 Metrological performance requirements
3.1 Frequency range
3.2 Power measurement range
3.3 Calibration factor of power sensor,
3.4 ​​Voltage standing wave ratio of power sensor
3.5 Pulse response.
3.6 Linearity of power sensor
3.7 Output power level of power meter calibration source 4 General technical requirements
4.1 Appearance mark
4.2 Other requirements
5 Control of measuring instruments
5.1 Verification conditions
5.2 Verification items and verification methods
Processing of verification results
5.4 Verification cycle
Appendix A Verification record format
JJG1024—2007
Appendix B Main items Daily measurement uncertainty assessment record
(1)
1 Scope
JJG1024—2007
Verification procedure for pulse power meters
This procedure applies to the initial verification, subsequent verification and in-use inspection of various pulse power meters. 2 Overview
Pulse power meter is a measuring instrument used to measure pulse power. The pulse power meter is composed of a pulse power sensor and a power indicator. Its working principle is to convert pulse power into DC (audio) power, which is indicated by the indicator. 3 Measurement performance requirements
3.1 Frequency range: 10MHz~18GHz
3.2 Power measurement range: -30dBm~+20dBm3.3 Calibration factor K of power sensor
3.4 ​​Voltage standing wave ratio S of power sensor: <1.893.5 Pulse response:
Rise time t.: <200ns;
Fall time t: <200ns.
3.6 Linearity L of power sensor: <10%3.7 Output power level of power meter calibration source Allowable error limit of power level: ±5%. 4 General technical requirements
4.1 Appearance mark
The pulse power meter should have the instrument name, instrument model, manufacturer, instrument factory serial number and power supply requirements. 4.2 Other requirements
4.2.1 The switches, knobs, buttons, input and output ports of the power meter should have clear identification marks. 4.2.2 The accessories of the instrument should be complete when it is sent for inspection, and the instrument manual should be available. The subsequent inspection also requires the inspection certificate of the previous inspection.
5 Control of measuring instruments
Control of measuring instruments includes initial inspection, subsequent inspection and inspection during use. 5.1 Inspection conditions
5.1.1 Equipment for inspection
The equipment used for inspection must be inspected and qualified by the metrology technical organization and within the validity period. 5.1.1.1 Signal generator
Frequency range: 10MHz~18GHz;
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Frequency stability: better than 1.5×10-4/10min; Amplitude stability: better than 0.5%/10min; Pulse modulation: external modulation;
Output power range: -70dBm～+20dBm. 5.1.1.2 Pulse generator
Frequency range: 100Hz5kHz or above;
Rise time (fall time): ≤2ns. 5.1.1.3 Isolator
Frequency range: 10MHz~18GHz;
Standing wave coefficient: ≤1.1 (10MHz～18GHz). 5.1.1.4 Vector network analyzer
Frequency range: 10MHz~18GHz;
Allowable error limit of voltage standing wave ratio measurement: 5%. 5.1.1.5 Standing wave test bridge
Frequency range: 10MHz~18GHz;
Voltage standing wave ratio: <1.06.
5.1.1.6 Power stand
Frequency range: 10MHz~18GHz;
Power range: 10gW~200mW;
Voltage standing wave ratio: <1.3;
Maximum allowable error: +2.1%.
5.1.1.7 Power stand
Note: Used for calibration of power reference level, commonly used thermistor stand. Frequency range: 10MHz～18GHz;
Power range: 10W~10mW;
VSWR: <1.3:
Maximum allowable error: ±1.1%.
5.1.1.8 Power indicator
Note: As a standard power indicator, HP432C or other indicators with similar functions are commonly used. Allowable error limit: ±0.5%.
5.1.1.9 Power divider
Frequency range: DC～18GHz;
Insertion loss: 8.5dB.
5.1.1.10 Digital voltmeter
Maximum effective digit: 6 and a half digits;
Allowable error limit: ±0.002% (DC voltage 10V range). 5.1.1.11 Step attenuator
Frequency range: DC~18CHz;
Attenuation accuracy: 0.2dB/10dB
5.1.2 Verification environment conditions
5.1.2.1 Temperature: (23±5)℃.
5.1.2.2 Relative humidity: ≤80%.
JJG1024—2007
5.1.2.3 Power supply: voltage (220±10)V, frequency (50±1)Hz5.1.2.4 Others: There is no mechanical vibration and electromagnetic interference in the surrounding area that may affect the normal operation of the verification system. 5.2 Verification items and verification methods
5.2.1 Verification items are shown in Table 1.
Table 1 List of calibration items
Item name
Appearance and normal working inspection
Voltage standing wave ratio of power sensor
Calibration factor of power sensor
Rise time and fall time of pulse response
Linearity of power sensor
Output power level of power meter calibration source
First calibration
Note: 1. "+" indicates the items to be inspected, "" indicates the items that may not be inspected; 2. The items to be inspected after repair are the same as those for the first inspection; 3. The technical requirements of the manual of the inspected power meter shall prevail during the inspection. Subsequent inspection
5.2.2 All inspection equipment shall be preheated according to the time specified in their respective technical manuals. 5.2.3 Appearance and normal operation inspection
5.2.3.1 Appearance and accessories
Inspection during use
Use visual method to inspect the appearance and accessories of the inspected pulse power meter, and the results shall comply with the provisions of Article 4. Note: The technical inspection pulse power meter described below includes the inspected power sensor and the inspected power indicator. 5.2.3.2 Normal operation inspection
Connect the inspected power sensor and the indicator used with it, and the indicator shall display normally after power on and preheating. If there is a self-inspection function, it shall be able to pass the self-inspection, and perform power calibration on the inspected power sensor with the internal power reference source according to the manual to check whether its status is normal. 5.2.4 Voltage standing wave ratio of power sensor S5.2.4.1 Connect the instrument as shown in Figure 1 and measure the reflection coefficient of the power sensor under test; Tested power indicator
Vector network analyzer
Tested power sensor
Figure 1 VSWR calibration block diagram
JJG1024—2007
5.2.4.2 Set the measurement frequency point of the vector network analyzer according to the working frequency range of the power sensor under test, and calibrate the vector network analyzer with standard parts (short-circuiter, open-circuit device, load): 5.2.4.3 Calculate the VSWR S of the power sensor under test according to formula (1): S
Where: S is the VSWR of the power sensor under test; I is the reflection coefficient T of the power sensor under test. Record the measurement results in Appendix A2.1.
5.2.5 Calibration factor K of power sensor
5.2.5.1 Transfer standard method
The transfer standard method is a device composed of a high-directivity single-directional coupler or power divider and a high-precision power meter, which forms a negative feedback amplitude stabilization system with a signal generator. The standard power seat in the standard device is obtained through the transfer of the standard value of the previous level, and the calibration coefficient K of the system is determined, which is then used to calibrate the power sensor under test.
Standard power indicator
Standard power stand
Signal generator
Power divider or
Directional coupler
Digital voltmeter
Tested power sensor
Figure 2 Calibration factor calibration block diagram of transfer standard method Tested power indicator
a. Connect the instrument according to Figure 2, and according to the instrument instructions, power on the required preheating instrument for heating: b. Set the output frequency of the signal generator to the required measurement frequency, and its output amplitude is set to the value that the tested power indicator can normally display; c. Read the indication Ph of the standard power indicator and the indication Pu of the tested power indicator on the main arm; d. Calculate the calibration factor K of the tested power sensor according to formula (2): K.-K.×P
P×[-2
Where:
K, is the calibration factor of the tested power sensor; K. ——Calibration factor of the standard power system; Pb——Power indication value of the standard power indicator, mW: Pbu——Power indication value of the power indicator under test, mW; 1-FeI, 2——Treat as mismatch term and be regarded as 1 in calculation. Record the calculation results in Appendix A2.1.
5.2.5.2 Alternating comparison method
JJG1024—2007
Alternating comparison method is to use a higher level standard power socket to calibrate the power sensor under test Standard power socket
Signal generator
Isolator
Power divider or
Directional combiner
Bokong power sensor
Relatively large calibration factor verification block diagram
a. Connect the instrument according to Figure 3,
and press the instrument to
b. Connect the standard power socket to the signal generator
Preheat:|| c. Connect the signal generator to the value that the power indicator to be tested can normally display. d. Add the output power of the standard power indicator and the power indicator value P to the power indicator to be tested. HOUSE
indicator indication value P
calculate the calibration factor f of the tested power sensor. According to the formula
Phs1-Fer
wherein:
calibration factor of the tested power sensor
standard power socket
calibration factor,
power indicator
standard power indicator The power indication value, mWPhs
US matching item
Record the calculation results in Appendix A
5.2.6 Rise time and fall time
Calculate as 1
METROL
5.2.6.1 Connect the instrument as shown in Figure 4, and power on the instrument to preheat the pulse generator
Signal generator
Tested power sensor
Figure 4 Rise time Verification block diagram of time and fall time Tested power indicator
JJG1024—2007
5.2.6.2 Set the frequency of the signal generator to the required measurement frequency and its output power level to the required measurement power level:
5.2.6.3 Set the repetition period of the pulse generator to 1ms, the rise time to be less than or equal to 2ns, the amplitude to 0.5V, and the duty cycle to 50%:
5.2.6.4 Set the frequency of the tested pulse power meter to be consistent with the frequency of the signal generator, change the speed of the tested power meter so that its waveform displays one cycle, and use the parameter measurement function of the tested power meter to read the rise time and fall time under different video bandwidths on the pulse power meter; 5.2.6.5 Select different measurement power levels and repeat the above steps to measure the rise time and fall time under different power levels.
Record the measurement results in Appendix A2.2
5.2.7 Linearity of power sensor L
Connect the instrument as shown in Figure 5 and preheat it according to the instrument requirements. Pulse generator
Signal generator
Standard step
Attenuator
Standard power socket
Drum test power sensor
Figure 5 Block diagram of linearity test of power sensor Standard power indicator
Tested power indicator
First, connect the standard step attenuator Set the subtraction value to 0dB. At this time, the readings of the standard power meter and the calibrated pulse power meter are recorded as P, and R, respectively. Then set the attenuation value of the standard step attenuator to another value (generally 10dB). At this time, the readings of the standard power meter and the calibrated pulse power meter are recorded as P, and R, respectively. The linearity L is expressed as [RR?
L=[P,/P2
1×100%
Where: R, R2——power indicator readings of the calibrated pulse power meter, mW; P, P2——power indicator readings of the standard power meter, mW. Measure the linearity of the power sensor under test in pulse and continuous wave modes respectively. 5.2.7.1 Pulse mode
day. Set the output frequency of the signal generator to the required measurement frequency, and its output level to the required measurement power level, and set the pulse modulation mode of the signal generator to external modulation: b. Set the output repetition frequency, pulse width and amplitude of the pulse generator to the required measurement state: c. Set the frequency of the standard power meter to be consistent with the frequency of the signal generator; d. Set the measurement mode of the power meter under test to pulse measurement mode, and its frequency is consistent with the frequency of the signal generator; e. Record the power indications of the standard power indicator and the power indicator under test respectively; f. Select different measurement power levels, repeat the above steps a~e, and calculate the linearity according to formula (4): g. Determine whether the measurement data meets the requirements according to the technical indicators in the manual. Record the measurement results in Appendix A2.3.
5.2.7.2 Continuous Wave Mode
JJG1024—2007
a. Set the output frequency of the signal generator to the required measurement frequency, and its output level to the required measurement power level, and turn off the pulse modulation mode of the signal generator: b. Set the output state of the pulse generator to "off"; c. Set the frequency of the standard power meter to be consistent with the frequency of the signal generator: d. Set the measurement mode of the power meter under test to continuous wave measurement mode, and its frequency is consistent with the frequency of the signal generator;
e. Record the power indications of the standard power indicator and the power indicator under test respectively; f. Select different measurement power levels, repeat steps a to e above, and calculate the linearity according to formula (4); g. Determine whether the measurement data meets the requirements based on the technical indicators in the manual. Record the measurement results in Appendix A2.3
5.2.8 Output of power meter calibration source
5.2.8.1 Connect the instrument as shown in Figure 6, and connect the V center terminal of the power indicator rear panel to the positive terminal of the digital voltmeter, and the V center terminal of the rear panel to the negative terminal of the digital voltmeter: Digital voltmeter
Tested pulse power meter (calibration source)
Power stand
Power indicator
Figure 6 Output power level verification block diagram of power meter calibration source5.2.8.2 Power on and preheat the instrument as required:5.2.8.3 Perform zero adjustment on the power indicator:5.2.8.4 Set the output power state of the pulse power meter calibration source to OFF, and record the digital voltmeter reading Vo at this time:
Set the output power state of the pulse power meter calibration source to ON, and record the digital voltmeter reading Vi at this time:
Disconnect the connection line of the power indicator V. connected to the negative terminal of the digital voltmeter, and directly connect the V on the rear panel of the power indicator to the voltage input terminal of the digital voltmeter, and record the digital voltmeter reading Vap at this time; 5.2.8.7 Calculate the output power P. of the pulse power meter calibration source to be tested according to formula (5): P = 2Vm(Vi- Vo)+ vi- v?
Where: P.
Output power of the calibration source of the pulse power meter under test; the value recorded in step f;
the value recorded in step e;
the value recorded in step d;
JJG1024—2007
the working resistance of the standard power meter is 2002;
the calibration factor of the standard power socket with the same output frequency as the calibration source of the power meter under test. 5.2.8.8 If the calibration source of the pulse power meter under test has different output levels, repeat the above steps. Record the calculation results in Appendix A2.4.
Processing of verification results
For pulse power meters that have passed the verification according to the requirements of this regulation, a verification certificate shall be issued; for those that have failed the verification, a verification result notice shall be issued, and the unqualified items shall be noted. The contents of the verification certificate and the verification result notice are the same as those in Appendix A. 5.4 Verification cycle
The verification cycle of pulse power meter is
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