TB 9-6625-2210-35
TRANSMISSION TEST SET AN/USM-608
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 TM 11-6625-3187-10 and TM 11-6625-3187-24.
d. Unless otherwise specified, all controls and control settings refer to the TI.
WARNING
HIGH VOLTAGE is used or exposed during the performance of
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 TI upper protective cover.
b. Connect TI to 115 V ac source and switch power on.
c. When main menu appears, select F2: TIMS/RL.
d. Select B: LEVEL/FREQ/ENV DELAY from TRANSMISSION MEASUREMENT
menu, and set parameters as listed in (1) through (7) below:
(1) 4 Wire/2 Wire to 4 Wire.
(2) RECEIVE IMPEDANCE to 600 OHMS.
(3) RECEIVE TERMINATED/BRIDGED to TERMINATED.
(4) RECEIVE TLP/ABS to ABSOLUTE.
(6) TRANSMIT TERMINATED/BRIDGED to TERMINATED.