AR6201 - RT6201 - RCU6201 - AR6203
DV 14307.03 Issue 1 7/2013 Page 3-11
3.8 Channel Spacing Mode
The transceiver provides two frequency channel spacing operation modes (8.33
kHz and 25 kHz), selectable by means of pressing “STO” and “MDE” keys
simultaneously for at least 2 seconds.
8.33 kHz channel spacing (left) / 25 kHz channel spacing (right)
Toggling of frequency channel spacing mode is only available for AR620X-(0XX)
variants. The AR620X-(1XX) variants cannot be toggled as those are working in
25 kHz Mode only.
In 25 kHz mode 5 frequency digits are shown. Only operating frequencies with
a channel spacing of 25 kHz are selectable. If 8.33 kHz channels are not in
use this mode provides the advantage of faster tuning since the 8.33 kHz
frequency steps are skipped.
In 8.33 and 25 kHz mixed mode 6 frequency digits are shown. The transceiver
tunes to all possible frequencies within the aviation VHF frequency band. The
channel spacing and operating frequency is derived automatically from the
selected and displayed frequency (refer chapter 1.6).
3.9 Storage Function
The VHF transceiver provides two databases:
1. User channels database - provides 99 channels identified as CH01 to CH99
or with individual labels with up to 10 characters. Any frequency can be
assigned to any CH within the VHF range from 118.000 MHz to 136.9916 MHz
by simply pressing the “STO” button. All 99 channels are editable, when
selected, after the “STO” button is pressed.
2. Last channels database - automatically stores nine last used frequencies,
identified and easy to recall as LAST1 to LAST9.
The user channels database can be edited manually by the pilots or,
uploaded/edited by using a PC-application connected to an interface port on
connector J1 of the AR620X.
3.9.1 Manual Storage Function
To modify the database select CHANNEL STORE option in the MEMORY OPTIONS page
in installation setup.
Press the “STO” key to activate the database modification in standard mode,
direct tune mode, or channel mode.
During this procedure the display looks similar to the channel mode with the
difference “STO” is displayed on the left side of the display. The display
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