TB 9-4931-427-24
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)
Range: 9.999991 to 10.000000009 MHz
Agilent, Model 33250A
Amplitude: 1 V rms
(33250A)
Datum, Model ET6000-75
TIME/FREQUENCY
Range: 1 and 10 MHz
11
(13589305)
WORKSTATION
Accuracy: 1.25 parts in 10
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
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.
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.
a. If necessary, adjust mechanical zero adjustment screw on FREQUENCY
DIFFERENCE meter face for a 0 indication.
b. Connect TI to a 115 V ac source.
c. Connect time/frequency workstation 1 MHz output to TI REF (TEST) INPUT.
d. Set TEST/OPERATE switch to TEST.
e. Set POWER ON/OFF switch to ON.