TB 9-6625-2296-24
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Page
Generator frequency modulation..........................
FM deviation meter (peak)....................................
Amplitude modulation meter................................
Frequency error meter and RF counter ...............
AF counter..............................................................
Power supply..........................................................
Final procedure ......................................................
IDENTIFICATION AND DESCRIPTION
1. Test Instrument Identification.
This bulletin provides instructions for the
calibration of Radio Test Set, AN/GRM-114B, AN/GRM-122 and TS-4317/GRM. The
manufacturers' manuals, TM 11-6625-3245-40, and TM 11-6625-3244-40 were used as the
prime data sources in compiling these instructions. The equipment being calibrated will be
referred to as the TI (test instrument) throughout this bulletin.
a. Model Variations. None.
b. Time and Technique. The time required for this calibration is approximately 16
hours, using the dc and low frequency and microwave technique.
2. Forms, Records, and Reports. Forms, records, and reports required for calibration
personnel at all levels are prescribed by TB 750-25.
3. Calibration Description. TI parameters and performance specifications which
pertain to this calibration are listed in table 1.
Table 1. Calibration Description.
Test instrument parameters
Performance specifications
RF SIGNAL GENERATOR
Frequency Range
500.0 kHz to 999.9999 MHz
Accuracy
0.5 PPM
Output Level Range
-122 to 0 dBm
2.0 dB @ 0 to ≤ -90 dBm1
Accuracy
2.5 dB @ -122 to -90 dBm
3.5 dB >400 MHz
Phase Noise
<-90 dBc/Hz at 20 kHz from output frequency >1 MHz to <930 MHz
<-85 dBc/Hz at 20 kHz from output frequency ≥930 MHz
<-80 dBc/Hz at 20 kHz from output frequency 500 kHz to ≤1 MHz
<-26 dBc
Non-Harmonics
<-50 dBc
Residual AM
(Post detection BW: 50 Hz to 15 kHz)
< 0.10% RMS from 1 to 999.9999 MHz
< 0.20% RMS ≤ 1 MHz
See footnotes at end of table.