TB 9-4931-491-35
6. Preliminary Instructions
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 TM 11-6625-2955-14&P for this TI.
perform the power supply checks (paragraphs 14 through 17) prior to making adjustments.
After adjustments are made, repeat paragraphs 8 through 13. Do not perform power
supply checks if all other parameters are within tolerance.
e. Unless otherwise specified, all controls and control settings refer to the TI.
7. Equipment Setup
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.
a. Remove top cover from TI as necessary for access to adjustments. Reinstall top
cover after completing check or adjustments.
b. Connect TI to a 115 V ac source.
c. Position controls as listed in (1) through (11) below:
(1) BAND switch to 1.
(2) SWEEP TIME SEC switch to LINE.
(3)
VAR/MANUAL control cw.
(4) OUTPUT switch to +10 dBm.
WIDTH
SIZE switch to WIDE.
(5) MARKERS
(6) MODE switch to ∆F.
(7) The four paddle switches to their extreme down position.
(8) MARKERS MHz 50 Har pushbutton pressed in (all other pushbuttons out).
(9) Set CENT FREQ to 250 MHz.
