Piper ARCHER III Pilot Operating Handbook page 294

SECTION9
SUPPLEMENT 2
SECTION 7 - DESCRIPTION AND OPERATION (continued)
Legend - Figure I
I. Mode Annunciation
the ADF button. This mode improves the aural reception and is usually
used for station idcntil' i cation. The bearing pointer is deactivated and will
move towards the 90
Direction Finder (ADF) mode is selected by the depressed position of the
ADF button. This mode activates the bearing pointer. The bearing pointer
w i ll point in the d i rection of the station relat i ve to the aircraft heading.
2. Active Frequency Display - The frequency to which the ADF is tuned is
displayed here. The active ADF frequency can be changed directly when
either of the timer functions are selected.
3. Beat Frequency Oscillator (BFO) - The BFO mode, activated and annun­
ciated when the ''BFO" button is depressed, permits the carrier wave and
associated morse code identifier broadcast on the carrier wave
CW signals (Morse Code) arc unmodulated and
no audio will be heard without use of BFO. This
type of signal is not used in the United States air
navigation. It is used in some foreign countries and
marine beacons.
4. Standby Frequency Annunciation (FRQ)
the STANDBY frequency is displayed in the right hand display. The
STANDBY frequency is selected using the frequency select knobs. The
selected STANDBY frequency is put into the ACTIVE frequency window
by pressing the frequency transfer button.
5. Standby Frequency Display - Either the standby
timer, or the elapsed time is displayed in this position. The flight timer
and elapsed timer are displayed replacing the standby frequency which
goes into "blind" memory Lo be called back at any Lime by depressing the
FRQ button. Flight time or elapsed time arc displayed and annunciated
alternatively by depressing the FLT/ET butlon.
REPORT: VB-2749
•9-16, 8 of' 10
- Antenna (ANT) is selected by the "out" position
°
relative position and then disappear. Automatic
NOTE
PA-28-181, ARCHER Ill
10
- When FRQ is displayed,
rre. q uency,
ISSUED: December 22, 2017
REVISED: May 7, 2018
•
of
be heard.
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the night
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