TB 9-6625-2021-24
EQUIPMENT REQUIREMENTS
calibration procedure. This equipment is issued with Secondary Transfer Calibration
Standards Set AN/GSM-286; 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
provide a four-to-one ratio between the standard and TI. Where the four-to-one ration
cannot be met, the four-to-one 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 paragraph 4 above, and are not listed in this
calibration procedure.
Table 2. Minimum Specifications of Equipment Required
Manufacturer and model
Common Name
Minimum use specifications
(part number)
AUTOTRANSFORMER
Range: 105 to 125 V ac
General Radio W10MT3AS3(7910809)
or Ridge, Model 9020A (9020A), or
Ridge, Model 9020F (9020F)
FREQUENCY COUNTER
Range: 10 Mhz
Fluke, Model PM6681/656
(PM6681/656)
Accuracy: <2 parts in 108
Accuracy: < 1.25 parts in 1010
FREQUENCY
Tracor, Model 527E (527E)
DIFFERENCE METER
F
Agilent, Model 33250A (33250A)
FUNCTION
Function: Sinewave, 50
requency: 10 Hz to 10 MHz
Amplitude: 1 to 200 mVpp
Accuracy: 2%+2mVpp
Range: -14.95 to +15.05 V dc
Fluke, Model 8840A/AF05
Accuracy: 0.08%
(AN/GSM-64D)
SIGNAL GENERATOR
Frequency: 10 MHz to 18 GHz
Wiltron, Model 68347M
Amplitude: -50 to -13 dBm
Datum, Model ET6000-75
TIME/FREQUENCY
Frequency: 1 and 10 MHz
(13589305)
Accuracy: < 1.25 parts in 1011
WORKSTATION
