TB 9-6625-2088-35
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 the
calibration procedure. The following peculiar accessories are also required for this
calibration: Attenuator X10, Tektronix, Type 011-0059-02; and termination, 50 Ω
feedthrough, Hewlett-Packard, Model 11048C.
Common name
Minimum use
Manufacturer and model
specifications
(part number)
AUDIO ANALYZER
Range: 1 and 100 kHz
Boonton, Model 1121 (1121)
Distortion capability: < 0.5%
CALIBRATOR
Range: 0.1 to 5 V dc
Fluke, Model 5720A (5720A/EP)
Accuracy: 0.5%
FREQUENCY COUNTER
Range: 0.001 Hz to 21 MHz
Fluke, Model PM6681/656 (PM6681/656)
Accuracy: 0.05%
Range: 5 mV to 25 V dc
Fluke, Model 8840A/AF-05/09
Accuracy: 0.03%
(AN/GSM-64D)
Range: 0.l to 15 V p-p
Tektronix, Type 2465B-46 (2465B-46)
Risetime: < 5 ns
Accuracy: 3%
THERMAL CONVERTER
Range: 2 kHz to 1 MHz
Ballantine, Model 1395-3 (7913198-1)
Voltage range: 3 V ac input
Accuracy: 0.3% to 100 KHz
0.5% 100 kHz to 1 MHz
TRUE RMS VOLTMETER
Frequency: 2 kHz
Fluke, Model 8922A/AA (8922A/AA)
Range: 4.8 mV to 5.3 V ac
Accuracy: 0.9% ( l%)
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