TB 9-6625-086-24
calibration procedure. The following peculiar accessories are also required for this
calibration: dc power supply, Elgar, model DCS40-30EM1-2 (13589313), and decade
resistor, CMC, model 240C (7907234)
Table 2. Minimum Specifications of Equipment Required
Manufacturer and model
Minimum use specifications
Common name
(part number)
AUTOTRANSFORMER
Range: 105 to 125 V ac
Ridge, Model 9020A (9020A)
Range: 9.950 kHz to 10.275 kHz
Fluke, Model PM6681/656 (PM6681/656)
COUNTER
Accuracy: 0.025%
Range: 0 to 25 Vdc
Agilent, Model 3458A (3458A)
Accuracy: 0.05%
POWER METER
Range: 0.01 to 10 mw
Hewlett-Packard 8402B (7911026)
CALIBRATOR
Accuracy: 0.25%
1
RESISTANCE STANDARD
Range: 1 kohm
Biddle-Gray, Model 71-631 (7910328)
Accuracy: 0.05%
THERMISTOR
Range: 10 MHz to 12.4 GHz
Hewlett-Packard, Models
MOUNT
Accuracy: 5%
10 MHz to 10 GHz
478A (7910461)
X486A (7910460)
8.2 to 12.4 GHz
1Not
used if power meter calibrator is available.
PRELIMINARY OPERATIONS
6. Preliminary Instructions
a. The instructions outlined in this section 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 and item identification number 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 controls and control settings refer to the TI.
WARNING
HIGH VOLTAGE is used or exposed during the performance of
this calibration.
DEATH ON CONTACT may result if
personnel fail to observe safety precautions.
REDUCE
OUTPUT(S) to minimum after each step within the
performance check where applicable.
