TM 11-5841-287-30
Section III. FUNCTION OF DATA TRANSMITTING SUBSYSTEM
2-17.
Uhf Receiver-Transmitter
2-18.
Uhf Radio Control
The uhf receiver-transmitter receives and transmits FM-
The uhf radio control provides uhf receiver-transmitter
FSK data on any one of 7, 000 channels in the 225 000
frequency/channel selection Two modes of frequency
to 399 975 MHz range Within the data transmitting set,
selection are provided manual and preset In the manual
the uhf receiver-transmitter primary function is to
mode, frequency selection is accomplished by
transmit serially encoded digital data to the ground
positioning individual digit selectors to the desired
station The receiver section is used only for monitoring
frequency In the preset mode, frequency selection is
the transmitted signal, of which a sample is supplied to
accomplished by a single channel selector switch Up to
the encoder for analysis Additional selfcheck circuitry is
20 channels may be selected in the preset mode
provided for determination of low rf power and
synchronization failure The transmitter section power
2-19. Uhf Radio Mount
output is 30-watts continuous A detail functional
The uhf radio mount receives 115 V ac, 400 Hz single
description of the uhf receiver-transmitter is provided in
phase and +28 V dc for application to the uhf receiver-
TM 11-5841-286-13.
transmitter The 115 V ac, 400 Hz is used only for
operation of a rear-mounted cooing fan
2-20
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