Cessna Hawk XP R172K Pilot Operating Handbook page 95

CESSNA300 ADF
(TYPE R-546E)
PILOT'S OPERATING HANDB()(
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LOT'S OPERATING HANDBOOK
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CESSNA 300 ADF
(TYPE R-546E)
1. OFF/VOL CONTROL - Controls primary power and audio output
level , Clockwise rotation from OFF position applies primary
power to receiver; further clockwise rotation increases audio level.
2. FREQUENCY SELECTORS - Knob (A) selects 100-kHz incre-
ments of receiver frequency, knob (B) selects 10-kHz incre-
ments, and knob (C) selects I-kHz increments.
Figure 1. Cessna 300 ADF Operating Controls and Indicators (Sheet 1 of 2)
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3. FUNCTION SWITCH:
BFO: Selects operation as communication receiver using
only sense antenna and activates lOOO-Hztone beat
frequency oscillator to permit coded identifier of
stations transmitting keyed CW signals (Morse
Code) to be heard.
REC: Selects operation as standard communication r'e-
ceiver using only sense antenna.
ADF: Set operates as automatic direction finder using loop
and sense antennas.
TEST: Momentary-on positi.on used during ADF operation
to test bearing reliability. When held in TEST
position, slews indicator pointer clockwise; when
released, if bearing is reliable, pointer returns
to or-iginal bearing position.
4. INDEX (ROTATABLE CARD) - Indicates relative, magnetic, or
true heading of aircraft, as selected by HDG control.
5. POINTER - Indicates station bearing in degrees of azimuth,
relative to the nose of the aircraft. When heading control is
adjusted, indicates relative, magnetic, or true bearing of
radio signal.
6. HEADINGCONTROL (HDG) - Rotates card to set in relative,
magnetic, or true bearing information.
Figure 1. Cessna 300 ADF Operating Controls and Indicators (Sheet 2 of 2)
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