TB 9-4931-443-50
Manufacturer and model
Common name
Minimum use specifications
(part number)
AUDIO ANALYZER
Range: 50 Hz
Boonton, Model 1121 (1121)
Capability: 0.05% distortion
AUTOTRANSFORMER
Range: 105 to 125 V ac
General Radio, Model W10MT3AS3
(7910809) or Ridge, Model 9020A
Accuracy: 1%
(9020A), or Ridge, Model 9020F
(9020F)
FREQUENCY COUNTER
Range: 50 Hz to 100 kHz
Fluke, Model PM6681/656
(PM6681/656)
Accuracy: 0.25%
Range: 100 V ac
Fluke, Model 8840A/AF05
Resolution: 20 ppm
(AN/GSM-64D)
6. Preliminary Instructions
process. Personnel should become familiar with the entire bulletin 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 manufacturer's manual for this TI.
d. 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.
a. Remove test instrument from protective cover as required for adjustments.
UNIT receptacle P201 located on rear panel.