TB 9-6625-2151-24
Table 2. Minimum Specifications of Equipment Required
Manufacturer and model
Common name
Minimum use specifications
(part number)
AUDIO ANALYZER
Frequency measurement: 85 kHz
Boonton, Model 1121 (1121)
Accuracy: 0.001%
Capability to measure distortion -50 dB at 1004 Hz
Fluke, Model 5720A (5720A)
CALIBRATOR
Dc voltage:
(p/o MIS-35947); w amplifier,
Range: -6.9 to 50 V
Fluke 5725A/AR (5725A/AR)
Accuracy: 0.1%
Ac voltage:
Range: -40.05 to 11.95 dBm
Frequency: 20 Hz to 85 kHz
Accuracy: 0.05 dB
Agilent, Model 3458A (3458A)
Range: 6.9 mV to 2.748 V ac, 20 Hz to 85 kHz
Accuracy: 0.57%
Range: -0.3 to +0.3 V dc
Range: 23.5 to 26 mA dc
Accuracy: 0.52%
Range: 10 V p-p
Agilent, OS-303/G (OS-303/G)
Accuracy: 3.0%
A
Biddle-Gray, Model 71-631
Range: 400
STANDARD
(7910328)
ccuracy: 0.1%
CALIBRATION PROCESS
6. Preliminary Instructions
a. The instructions outlined in paragraphs 6 and 7 are preparatory to the calibration
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 the procedure. Additional
maintenance information is contained in TM 11-6625-3186-24 and the manufacturer's
manual for this TI.
d. When indications specified in paragraphs 8 through 13 are not within tolerance,
perform power supply check prior to making adjustments. If adjustments are made, repeat
paragraphs 8 through 13. 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.