User manual

 Selected Channel
This field allows the user to choose a selected channel pair for receiving and transmitting. Allowable entries are 1
to 16. The selected channel will be used if Channel Select 1 and Channel Select 2 are NOT selected. (COM/Analog
Tab). Note: This feature is disabled when a Channel Select Line is enabled (green or white wire).
 Chan Scan Time
Allows the user to configure the modem to switch (increment from the Selected Channel) to a new channel if it has
not received a valid data packet for this programmable time. This is programmable in steps of 20 seconds (60 to
5000 seconds, or 1 to 83 minutes). Setting Chan Scan Time to zero disables channel scan operation and the modem
remains on the selected channel. Note: This feature is disabled when Sleep/Suspend Period is enabled, when
Master Mode is enabled or when a Channel Select Line is enabled (green or white wire).
 Chan Select Voltage
Allows the user to determine voltage thresholds for Channel Select 1 (green) and Channel Select 2 (white) inputs (if
programmed). A low level (logic 0) is a voltage less than the set voltage threshold and a high level (logic 1) is a
voltage greater than the set voltage threshold. Note: Multi-Channel operation is available in modem firmware
version 2.20 and later.
4.3.1.4 SET UP MODEM/RADIO PARAMETERS: FREQ
UENCIES TAB
The Frequencies Tab allows the user to program the radio channels (Frequency Pairs).
Figure 21: Frequencies Tab
 Rx Frequency
Enter the Rx frequency of the designated receive channel
 Tx Frequency
Enter the Tx frequency of the designated transmit channel. There are 12 VHF splinter channels available for
quarter-channel VHF (6.25 kHz) Integras.
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