T-45C TS, ADV & IUT ENG-27/ENG-28
Engineering Review
(c) Frequency select switches: used to
manually select desired frequency
when frequency selector in MAN
position
(d) FREQ (CHAN) display window:
displays digital readout of selected
frequency or channel and BIT results
(e) UHF AM/FM mode switch
(i)
Selects either AM or FM mode
when RT is tuned to frequencies
in 225.0 to 399.975 MHz band
(ii) Mode selection automatic in all
other bands
(f)
Squelch switch
(i)
SQL: eliminates receiver
background noise when no signal
is being received (decreases
reception sensitivity)
(ii) OFF: disables main receiver
automatic squelch to increase
reception range/sensitivity
(g) Brightness (BRT) control knob:
adjusts light intensity of frequency/
channel display
(h) Receiver volume (VOL) control knob:
adjusts level of UHF/VHF audio signals
delivered to the communications
amplifier
NOTE: With exception of the marker
signals volume, volume of the COMM,
VOR/ILS, and TACAN are adjustable
from each cockpit through the
individual system control unit.
(9-98) Original
Page 27-122
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