Piper ARCHER III Pilot Operating Handbook page 230

SECTION 9
SUPPLEMENT 5
COMM TRANSCEIVER (CONT'D)
The outer knob will change the MHz portion of the standby display. At one
band-edge (118 or 136 MHz) the following 1 MHz change will wrap around to
the other band-edge. The inner knob will change the kHz portion of the
standby display. It will change in steps of 50 kHz when the knob is pushed in,
and 25 kHz when the knob is pulled out. For 8.33 kHz versions, channels are
incremented in 25 kHz steps with the knob pushed in and 8.33 kHz with the
knob pulled out. (Both 8.33 kHz and 25 kHz frequencies are channeled when
the knob is pulled out). The frequency wrap around at the edge of the band is
also utilized when incrementing or decrementing the kHz portion of the
standby display.
To tune the radio to the desired operating frequency, the desired frequency
must be entered into the standby display and then the transfer button must be
pushed. This will trade the contents of the active and standby displays. The
operating frequency can also be entered by accessing the ACTIVE ENTRY
(direct tune) mode which is done by pushing and holding the COMM
TRANSFER button for 2 or more seconds. In the direct tune mode, only the
active part of the display is visible. The desired frequency can be directly
entered into the display. Push the COMM TRANSFER button again to return
to the active/standby display.
The transceiver is always tuned to the frequency appearing in the ACTIVE
display. It is therefore possible to have two different frequencies stored in the
ACTIVE and STANDBY displays and to change back and forth between them
at the simple push of the transfer button.
During the transmit mode of operation, a "T" will appear between the
ACTIVE and STANDBY displays. An "R" will appear between the ACTIVE
and STANDBY displays if a detected signal is strong enough to open the
squelch, signifying that the transceiver is in the receive mode of operation.
A non-volatile memory stores the comm ACTIVE and STANDBY frequencies
on power down. When the unit is turned on again, the COMM ACTIVE and
STANDBY windows will display the same ACTIVE and STANDBY
frequencies that were displayed before power down.
REPORT: VB-1611
9-30
PA-28-181, ARCHER III
ISSUED: JULY 12, 1995
REVISED: APRIL 3, 1997