Cessna 150 COMMUTER 1976 Pilot Operating Handbook page 88

PILOT'S OPERATING HANDBOOK
SUPPLEMENT
SUPPLEMENT
CESSNA 300 ADF
(Type R-546E)
SECTION 1
GENERAL
CESSNA 300 ADF
(T YPE R-546E)
The Cessna 300 ADF is a panel-mounted, digitally tuned automatic
direction finder. It is designed to provide continuous 1 kHz digital tuning
in the frequency range of 200 kHz to 1,699 kHz and eliminates the need for
mechanical band switching. The system is comprised of a receiver, loop
antenna, bearing indicator and a sense antenna. In addition, when two or
more radios are installed, speaker-phone selector switches are provided.
Each control function is described in Figure 1.
The Cessna 300 ADF can be used for position plotting and homing
procedures, and for aural reception of amplitude-modulated (AM) signals.
With the function selector knob a t ADF, the Cessna ADF provides
a visual indication, on the bear ing indicator, of the bearing to the trans-
mitting station relative to the nos e of t he airplane. This is done by com-
bining signals from the sense antenna with signals from the loop antenna.
With the function selector knob at REC, the Cessna ADF uses only
the sense antenna a nd operates as a conventional low-frequency receiver.
In the REC, position, the indicator will aut omatically move to the point-
er stow position. This feature alerts the operator to non-ADF operation
by positioning and retaining the pointe r at t he 3:00 o'clock position.
The Cessna 300 ADF is designed to r eceive transmission from the
following radio facilities: commercial br oadcast stations, low-frequency
range stations, FAA radio beacons, and ILS compass locators.
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