User manual

Page 71
Aircraft Operation Manual
Piper Cheyenne I, IA, II, IIXL
For ight simulation use only
323 2 31
ANT/ADF
Mode Annunciation
IN USE
Frequency
BFO
Annunciation
STANDBY
Frequency
Annunciation
STANDBY Frequency,
FLIGHT TIME or
ELAPSED TIME
Flight timer and
Elapsed timer
mode annunciation
ON/OFF
Control Switch
Select ANT mode
(out position)
Select ADF mode
(in position)
Frequency
Transfer
Button
Select FLIGHT
TIMER or
ELAPSED TIMER
Set and Reset
ELAPSED TIMER
Select
BFO
Button
Frequency
Select
Knobs
KR 87 ADF Receiver Operation
Power-on
Rotate the ON/OFF/VOL knob clockwise from the detented „OFF” position. The
unit will be activated and will be ready to operate.
Frequency Selection
The active frequency (to which the ADF is tuned) is displayed in the left side of
the window at all times. A standby frequency is displayed in the right side when
„FRQ” is annunciated. The standby frequency is placed in „blind” memory when
either FLT (Flight Time) or ET (Elapsed Time) mode is selected.
With „FRQ” annunciated, the standby frequency is selected using the frequency
select knobs which may be rotated either clockwise or counterclockwise. Pull the
small inner knob out to tune 1’s. Push the smaller inner knob in to tune 10’s. The
outer knob tunes the 100’s and the 1000’s up to 1799.
The standby frequency selected may then be put into the active window by pres-
sing the „FRQ” button. The standby and active frequencies will be exchanged
(ip-opped), the new frequency will become active, and the former active fre-
quency will go into standby.
Operating Modes
Antenna (ANT) mode is selected and annunciated when the „ADF” button is
in the „out” position. ANT provides improved audio reception from the station