TB 9-6625-2151-35
Table 2. Minimum Specifications of
Equipment Required
Minimum use
Manufacturer and model
Common name
specifications
(part number)
AUDIO ANALYZER
Boonton, Model 1121 (1121)
Accuracy: 0.001%
Capability to measure distortion ≤ -50 dB at 1004 Hz
CALIBRATOR
Dc voltage:
John Fluke, Model 5720A
Range: -6.9 to 50 V
(p/o MIS-35947)
Accuracy: 0.1%
Ac voltage:
Range: -40.05 to 11.95 dBm
Accuracy: 0.05 dB
Range: 6.9 mV to 2.748 V ac, 20 Hz to 85 kHz
Hewlett-Packard, Model
Accuracy: 0.57%
3458A (3458A)
Range: -0.3 to +0.3 V dc
Range: 23.5 to 26 mA dc
Accuracy: 0.52%
Range: 10 V p-p
Tektronix, Model
Accuracy: 3.0%
2465BOPT46 (2465BOPT46)
Range: 400Ω
Biddle-Gray, Model 71-631
STANDARD
(7910328)
Accuracy: 0.1%
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
b. Items of equipment used in this procedure are referenced within the text by common
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.