User's Manual

23 ADL Vantage/ADL Vantage Pro/ADL Vantage 35
Although the radio modem supports both GMSK and 4FSK modulation, you cannot select
a modulation type with the user interface. The radio automatically selects the appropriate
modulation based on the channel bandwidth of the channel table programmed into
the radio (displayed on the Device Status screen as CH BW: 12.5 or 25 kHz), the data
protocol, and the radio link rate. If you want to select a modulation type first and then an
appropriate channel bandwidth, protocol and link rate, use the ADLCONF software to
configure the radio.
Eight rarely changed functions are grouped together under Advanced Menus. In order
to speed everyday navigation, they are not displayed. The default values are indicated in
the table above. To make a change to any of these functions, go to the Advanced Menus
feature, press the down arrow until Show appears on the second line and then press the
Enter button. Press the right arrow sequentially to display these eight functions. To hide
these features, return to the Advanced Menus feature and then select the Hide option.
Automatic Channel Selection
Using the ADL Vantage radio (but not the ADL Vantage Pro), you can have the
radio automatically select the channel with the strongest signal containing
decipherable data, i.e., data configured with the same protocol, modulation
and link rate. This allows you to transmit data on one radio and then lock
onto that transmission without having to remember the channel number or
frequency. However, both radios must still be set to all other radio parameters
(radio protocol, Forward Error Correction, Scramble Control, etc.) in order to
communicate.
To use the Automatic Channel Selection feature, scroll to the Channel/Freq
screen on the ADL Vantage front display. Go to the bottom of the channel table
and press Enter when you see one of the AutoRover options. Select the AutoRover
1 option when you want the radio to automatically scan the entire channel table
and select the frequency with the strongest decodable signal. The AutoRover 1
option will perform one scan when the radio is turned on, tune to the channel
with the strongest signal containing decipherable data and stop scanning. The
AutoRover 2 option will perform a scan for the strongest decodable signal when
the radio is turned on and will perform a subsequent scan if the percentage of
received data packets drops under 90%.
If no decipherable data is detected on any of the programmed channels by either
of the AutoRover options, the radio will continue to scan the channel table. To
stop the scan and select a channel temporarily (until the next power cycle), wait
until the channel is displayed on the LCD and press the Enter button. Then check
that the radio is configured in the same way as the transmitter. After power
cycling the ADL Vantage radio, it will return to the selected AutoRover option. To
turn the option off, you must select the MANUAL option on ADLCONF’s Radio
Link screen, click Program and then power-cycle the radio.