TB 9-6625-1978-24
CALIBRATION PROCESS FOR
MICROWAVE PULSE COUNTER, TD-1338
(EIP, MODEL 451)
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 results 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. When indications specified in paragraph 8 are not within tolerance, perform the
power supply check prior to making adjustments. After adjustments are made, repeat
paragraph 8. Do not perform the power supply check if all other parameters are within
tolerance.
e.
Unless otherwise specified, all controls and control settings refer to the TI.
7. Equipment Setup
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. Remove protective cover from TI only when necessary to make adjustments. Replace
cover after completing the adjustments.
b. Position controls as listed in (1) through (5) below:
(1) SAMPLE RATE control fully ccw.
(2) RESOLUTION switch to 1 ms GATE.
(3) BAND select switch to A 950 MHz.
(4) MANUAL SELECT/AUTO SWEEP switch to AUTO SWEEP.
(5) PRESET/START FREQUENCY thumb-wheel switch to 00.0 GHz.
c. Press POWER pushbutton to on and allow at least 1 hour for stabilization.
