TM 11-6625-2632-14
indication on all tests, it is known to be operating
c. If meter indicated in the green area (GO) briefly
properly and receiving radio testing can proceed.
during whistle, voice power output is satisfactory.
b. Set the VOL control of the transmitting radio to
d. If meter indicated in the red area (NO-GO)
minimum and the function switch to the BCN 243.0
throughout the test, voice power output is not
(beacon) position.
satisfactory. Repeat the test carefully. If meter still does
not indicate in the green area, replace the AN/PRC-90.
c. Set the function switch of the receiving radio to
the VOICE/MCW 243.0 position and the VOL control to
MAX.
2-13. 243.0 MHz Receiver Check
a. For receiver tests, a Radio Set AN/PRC-90 with
d. A beacon signal should be heard from the
a transmitter known to be operating properly must be
speaker of the receiving radio.
connected to the transmitter cable of Radio Test Set
e. If no beacon signal can be heard from the
AN/PRM-32. If the transmitting radio under test in
speaker of the receiving radio, replace the receiving
AN/PRC-90.
Figure 2-3. Radio Set AN/PRC-90 controls and indicators.
2-4
