TB 9-6625-862-35
EQUIPMENT REQUIREMENTS
4. Equipment
Required. Table 2 identifies the
specific equipment to be
used in this
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
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 paragraph 4 above, and are not listed in this
Table 2. Minimum Specifications of
Equipment Required
Manufacturer and model
Common name
Minimum use specifications
(part number)
AUDIO ANALYZER
Range: 35 Hz to 20 kHz
Boonton, Model 1121 (1121)
Distortion: < 1%
General Radio, Type W10MT3AS3
Range: 105 to 125 V ac
(7910809), or Ridge, Model 9020A
Accuracy: 1%
(9020A), or Ridge, Model 9020F
(9020F)
Range: 20 Hz to 21 kHz
Fluke, Model PM6681/656
Accuracy: 0.5%
(PM6681/656)
Range: 0.46 mV to 79 V
Fluke, Model 8840A/AF-05/09
Accuracy: 0.29%
(AN/GSM-64D)
STEP ATTENUATOR
Range: 40 dB
Tech Laboratories, Model C-8756
Voltage: 50 V
(MIS-35949)
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
calibration.
b. Items of equipment used in this procedure are referenced within the text by common