TB 9-6625-2338-24
EQUIPMENT REQUIREMENTS
calibration procedure. This equipment is issued with Secondary Transfer calibration
Standards Set AN/GSM-286, AN/GSM-287 and 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, 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
calibration procedure.
Table 2. Minimum Specifications of Equipment Required
Minimum use
Manufacturer and model
Common name
specifications
(part number)
FREQUENCY COUNTER
Range: 0 to 10 MHz
Fluke, Model PM6681/656
Accuracy: r 0.25 Hz
(PM6681/656)
Range: 0 to 10 s
Accuracy: 125 ps
Range: 0 to 300 MHz
Agilent, OS-303/G (OS-303/G)
Accuracy: .5 ns rise time
Range: -3 to +4 V dc
Accuracy: 12.5 mV + 0.75% of
pulse amplitude
CALIBRATION PROCESS
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
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 control and control settings refer to the TI.
