SJ 20272-1993 HP346B solid noise source verification procedures SJ20272-1993 standard download decompression password: www.bzxz.net

Military Standard of the Electronic Industry of the People's Republic of China FL0150
SJ20272—93
HP346B Solid-State Noise Source
Verification Regulation of
model HP346B solid-state noise generators1993·-02—09Released
China Electronics Industry Corporation
1993—05---01Implemented
Military Standard of the Electronic Industry of the People's Republic of China HP346B Solid-State Noise Source
Verification Regulation of
nodel HP346B solid . - satate noise generators1 Scope
1.1 Subject Content
SJ24272—93
This verification procedure specifies the verification conditions, verification items, verification methods, verification result processing and verification period of HP346B solid noise generator. 1.2 Applicable Scope
This verification procedure is applicable to the verification of HP346B solid noise source. Other similar solid noise sources can also be verified by referring to this procedure. 2 Referenced Documents
Dead Articles of this Chapter.
3 Definitions
Dead Articles of this Chapter.
4 General requirements
4.1 Purpose and principle of the measured instrument
China Electric Industry Corporation
[393-02-09 Issued
1993-05-1 ImplementationbZxz.net
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When the HP346B solid noise source is biased, it will output white noise; when it is not biased, it will output residual media noise due to thermal agitation. These two different noise levels are used to measure the additional noise of the device under test, that is, the noise figure. The noise source is a necessary equipment for noise figure measurement.
4.2 Technical requirements
4.2.1 Frequency range
10MHz～18GHz.
4.2.2 Super-noise ratio
14～16dB,
4. 2. 3 Voltage standing wave ratio
10~30MHz:1. 30:
30~5000MHz:1.15:
5~18GHz:1. 25
4.2.4 Super-noise ratio accuracy
±0.3dB.
4.3 Verification conditions
4.3. Environmental conditions
. Ambient temperature: 17±5℃.
h. Relative humidity: 45%~75%.
c. Air base strength: 86106kPa.
d. Power supply: 220V=2%.50Hz=1%: e. Surrounding environment: no mechanical vibration and electromagnetic field interference that may affect normal operation. 4.3.2 Calibration equipment
The calibration equipment is shown in the following table.
Equipment Name
Hot and cold standard
Measurement receiver
Low-frequency preamplifier
DC regulated power supply
DC digital
Voltmeter
Transmission amplifier
Scalar network
Analyzer
Signal generator
Stationary correction
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Main technical indicators
Cold load: 77.3'K+1'K
Hot load: 373.2°K1K
Medium frequency: 30MHz
3B bandwidth: 1MHz
Noise figure 8.5
Full-scale sensitivity: -- 90dPr
Average noise figure: ≤2.5dB
Frequency range: 11MH-18GHz
Output voltage 10~28V
Measurement range: 7~28V
Accuracy: Excellent
Frequency range: 10MIEz--18GHz
VSWR: <1.2
Gain: >20d
Noise figure: ≤3d
Frequency range: 10MHz~1aGH
Vertical accuracy: ±0.5kB
Frequency range, 10MHz~18GH,
Output level: 0~ [dBm
Directivity 235dz
Accuracy+1,018=0,08p31)
Note: 1) p is the reflection coefficient of the noise source under test. 5 Detailed requirements
5.1 Verification items and methods
5.1.1 Appearance and working normality inspection
Test model
AL7009
AL1363
AIL13505
HT-1712G
Self-made or purchased
HP560A
WL6647
WIL560-97N-50
S.1.1.1 The inspected instrument should be accompanied by the product technical manual and necessary accessories. If it is not the first inspection, the previous inspection certificate should be attached.
5.1.1.2 The instrument under test should have no mechanical damage that affects its normal operation. All fasteners should be tightened well.
5.1.2 Verification of super noise ratio accuracy
5.1.2.1 Slowly pour liquid nitrogen into the Dewar bottle of the cold and hot standard noise source. Cover the lid. There should be a hissing sound of liquid nitrogen evaporating in the bottle. 5.1.2.2 Connect the instrument according to Figure 1. S, S, S, are all in the off state. Start the machine and preheat for 30 minutes.
Hot and cold standard noise
Digital ampere voltmeter
Amplifier
Generator
DC signal power supply
Front wall amplifier
Receiver
5.1.2.3 Use the hot and cold standard noise source and the manual Y coefficient method to calibrate and measure the noise coefficient of the transfer amplifier. To do this, close S and apply a bias voltage that meets its requirements to the transfer amplifier. The input end of the transfer amplifier is first connected to the cold load end of the hot and cold standard noise source, and the output frequency of the signal generator is adjusted to the detection frequency specified in Table A1 of Appendix A (Supplement). Then adjust the output level of the signal generator to make the mixing current about ImA.
5.1.2.4 Adjust the gain and attenuation of the receiver so that the meter of the receiver indicates an appropriate reading α and record the attenuator reading A1 at this time. 5.1.2.5 Transfer the input end of the transfer amplifier from the cold load end of the cold and hot standard noise source to the hot load end. Adjust the attenuation of the receiver so that the meter indication value returns to a14
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and record the attenuator reading A2 at this time. 5.1.2.6 Calculate △A, Y. and F. values ​​according to formulas (1), (2) and (3), and record the results in Table Al.
AA,=AA,
Y,-10%
Where: T. —290K
T.—cold load temperature. Without correction, T is taken as 77.3°K; TH——hot load temperature. Without correction, TH is taken as 373.2°K.
Note: 1) When the detection frequency is higher than 2GHz, due to the increase of RF loss, the values ​​of T and T need to be corrected. The corrected values ​​of T and T can be obtained by referring to the relevant correction lines in the 709 technical manual, and then the noise coefficient s of the transfer amplifier can be obtained according to formula (3).
5.1.2.7 Connect the input end of the transfer amplifier to the instrument under test, and correctly adjust the gain and attenuation of the receiver so that the receiver head indicates an appropriate reading of 42. At the same time, record the attenuator reading As at this time.
5.1.2.8 Close S, and apply a +28V excitation voltage to the instrument under test. Increase the attenuation of the receiver to make the receiver meter indication value return to α, and record the attenuator reading at this time. Al4
5.1.2.9 Calculate AA, Y. and ENR values ​​according to formula (4), (5) (6), and record the results in Table Al.
AA,=A,- A,
ENRF(Y,-1)
In the formula, Y.-—Y coefficient, dB;
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F—Noise coefficient, dB:
ENR——Excess noise ratio of the instrument under test.dB.
5.1.2.10 According to the provisions of Table A1, change the output frequency of the signal generator and repeat 5.1.2.3 to 5.1.2.9. Calculate the excess noise ratio and excess noise ratio error according to formula (7) and (8) respectively.
ENR-F,+10lg[10%-1]. (?)
4-ENR(nominal)-ENR(actual), (8) Record the result in Table A1.
5.1.3 Verification of voltage standing wave ratio
5.1.3.1 Connect the instrument according to Figure 2 and preheat for 30 minutes. Scalar network analyzer
Signal generator
Surge analyzer
Tested instrument
Regulated power supply
5.1.3.2 According to the method of measuring return loss with scalar network analyzer, measure the return loss LI, L, (αB) of S, when it is open and closed respectively, and record the results in Table A2. 5.1.3.3 According to formula (9), calculate the voltage standing wave ratio S1, S of the tested instrument in the two states of flameout and ignition, and record the results in Table A2. 1+10-yuan
S 1+10-
1--10-
5.2 Processing of verification results and verification cycle
5.2.1 A verification certificate shall be issued for solid noise sources that have passed the verification, and a verification result notice shall be issued for those that have failed the verification, and the unqualified items shall be indicated. 5.2.2 The verification cycle is - years, and the source may be sent for inspection at any time if necessary. 6
Testing information
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Appendix A
Verification record form
(Supplement)
Exceedance noise ratio verification
ENR difference 4
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Tide rate range
. -n, 3
, 03~5. h
Additional instructions:
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Voltage standing wave ratio verification
Minimum echo loss
Ignition state
Flame-out state
Voltage standing wave ratio
Ignition state
This standard is proposed by the Science and Technology Quality Bureau of China Electronics Industry Corporation. This standard is under the jurisdiction of China Electronics Technology Standardization Institute. This standard was drafted by the 13th Institute of the Ministry of Machinery and Electronics. The main drafters of this standard are Gao Jinliang and Zheng Yanqiu. Project code: 075--147.
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