TB 9-6625-1959-35
EQUIPMENT REQUIREMENTS
calibration procedure. This equipment is issued with Secondary Transfer Calibration
Standards Set AN/GSM-287 or AN/GSM-705. Alternate items may be used by the
calibrating activity. The items selected must be verified to perform satisfactorily prior to
use and must bear evidence of current calibration. The equipment must meet or exceed the
to-one ratio between the standard and TI. Where the four to-one ratio cannot be met, the
actual accuracy of the equipment selected is shown in parenthesis.
usage accessories issued as indicated in paragraph 4 above and are not listed in this
calibration procedure. The following peculiar accessory is also required for this calibration:
Precision 36-inch, 50Ω BNC Cable, Tektronix, PN 0120482-00 supplied with TI.
Manufacturer and model
Common name
Minimum use specifications
(part number)
AUDIO ANALYZER
Range: .01679 to 1.82 V ac at 50 kHz
Boonton, Model 1121
Accuracy: 0.75% (1%)
(1121)
MEASURING RECEIVER
Range: 100 kHz to 250 MHz at 1 V ac
Consisting of: Measuring receiver
Flatness: .375% (.65%)
Hewlett-Packard, Model 8902A
(8902A) and sensor module Hewlett-
Packard, Model 11722A (11722A)
Range: 5.2 and -22 V dc
Hewlett-Packard, Model 3458A
Accuracy: .06%
(3458A)
SIGNAL GENERATOR
Range: 1 V at 100 kHz
(SG-1207/U)
SPECTRUM ANALYZER
Range: 50 kHz to 250 MHz
(AN/USM-677)
Capability: < -45 dBc
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
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.
CHANGE 1
