TB 9-6625-2079-35
EQUIPMENT REQUIREMENTS
calibration procedure. This equipment is issued with Secondary Transfer Calibration
Standards Sets 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
minimum use specifications listed in table 2. The accuracies listed in table 2 provide a four-
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.
5. Accessories Required. The
accessories required for this
calibration are common
usage accessories, issued as indicated in 4 above, and are not listed in this calibration
procedure.
Table 2. Minimum Specifications of
Equipment Required
Minimum use
Manufacturer and model
Common name
specifications
(part number)
MEASURING
Range: 10 to 90% AM
Hewlett-Packard, Model 8902A w/sensor, Hewlett-
RECEIVER
10 to 270 kHz FM
Packard, Model 11722A (11722A)
Accuracy: .5% (1% 1 digit)
Range: 0 to 15 V dc
Hewlett-Packard, Model 3458A (3458A)
Accuracy: .025%
POWER SPLITTER
Range: 10 to 500 MHz
Weinschel, Model 1870A (7916839)
Accuracy: .15 dB
SYNTHESIZED
Range: 10 MHz to 1.2 GHz
Wiltron, Model 68369NV (68369NV)
SIGNAL
Output Level: +10 dBm
Accuracy: 1.5 dB
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
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. When indications specified in
paragraphs 8 through 12 are not within
tolerance,
perform the power supply check prior to making adjustments. After adjustments are made,