TB 9-4931-488-35
Table 2. Minimum Specifications of Equipment Required - Continued
Manufacturer and model
Common name
Minimum use specifications
(part number)
(AN/USM-677)
SPECTRUM ANALYZER
Range: 0.5 to 1024 MHz
Accuracy: +0.25 dB/dB but not
more than +1.5 dB over
70 dB range
TRUE RMS VOLTMETER
Range: 0 to 3.1 V ac
Fluke, Model 8922A/AA
Accuracy: 1% (20 to 50 Hz)
(8922A/AA)
.5% (50 Hz to 200 kHz)
.7% (200 to 600 kHz)
6. Preliminary Instructions
process. Personnel should become familiar with the entire procedure before beginning the
calibration.
b. Items of equipment used in this procedure are referenced within the text by common
name as listed in table 2.
c. Unless otherwise specified, verify the result of each test and, whenever the test
requirement is not met, take corrective action before continuing with the calibration.
Adjustments required to calibrate the TI are included in this procedure. Additional
maintenance information is contained in the manufacturers' manuals for this TI.
perform the power supply check prior to making adjustments. After adjustments are made,
repeat paragraphs 8 through 18. Do not perform power supply check if all other
parameters are within tolerance.
e. Unless otherwise specified, all controls and control settings refer to the TI.
7. Equipment Setup
HIGH VOLTAGE is used or exposed during the performance of
this calibration.
DEATH ON CONTACT may result if
personnel fail to observe safety precautions.
REDUCE
OUTPUT(S) to minimum after each step within the
performance check where applicable.
NOTE
Remove TI covers only as required to perform adjustments or
set internal switches.
CHANGE 2
