TM-9-2350-275-BD
M113 FAMILY CARRIER, PERSONNEL SELF-PROPELLED FULL-TRACKED
TECHNICAL MANUAL; OPERATORS, ORGANIZATIONAL, DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE; BATTLEFIELD DAMAGE ASSESSMENT AND REPAIR
TM-9-2350-275-BD - Page 143 of 223
TM 9-2350-275-BD
COMMUNICATIONS SYSTEM
Procedural Steps (Cont):
ac. To
operate in
the
CHANNEL/CONTINUOUS TUNE
labelled I and II.
“I” corresponds
frequencies.
continuous
tune
SELECTOR SWITCH
to Band I frequencies
mode,
turn
the PRESET
(18) to the lower positions,
and “II” corresponds to Band II
ad. the FREQUENCY TUNING KNOB (27) to the desired frequency.
ae. Load the antenna by accomplishing steps (w) thru (z).
CAUTION
Observe a 1:3 transmit to receive ratio i.g., 3 minutes
transmit to 9 minutes receive, to minimize the possibility of
overheating the power supply and power output tubes.
af. You are now ready to operate in the continuous tune mode. The tuning
controls are very sensitive; therefore, the continuous mode should not be selected if the
radio is to be moved or subjected to vibrations.
9.
Record the BDAR action taken.
When the mission is completed, as soon as
practicable, repair vehicle using standard maintenance procedures.
11-27. FOREIGN EQUIPMENT INTERCHANABILITY (ALLIED RADIOS)
General Information
This procedure contains general installation instructions for Allied radio equipment.
Limitations
●
Vary according to radio set but you can expect a decrease in operating range on some
sets.
●
You can expect not to be able to transmit and receive on all frequencies within the
U.S. AN/VRC-12 frequency range.
Personnel/Time Required
●
1 soldier
●
Approximately one hour for each type of installation
Other Options
●
Replace with the AN/VRC-12 series of radio components from foreign vehicles.
(Refer to para. 11-25.)
●
Replace with Soviet radio R-123M. (Refer to para. 11-26.)
Procedural Steps
1. Refer to table 11-1 for comparison purposes in determining limitations.
11-37
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