User's Manual

Integra-TR User Manual Page | 35
voltage greater than the Channel Select Voltage. Channel Select Voltage is selected on the Radio Tab. For 2 Channel Select
Mode, a low level input will select channel 1 and a high level will select Channel 2. For 4 Channel Select Mode, see Table 7.
Note: When configured as a Digital Output, the open collector transistor requires an external pull-up (i.e., resistor) to a
voltage of 2 to 10 volts.
Note: Multi-Channel operation is available in modem firmware version 2.20 and later.
Table 7 - 4 Channel Select Mode
Channel Select 2
Channel Select 1
Channel 1
low
low
Channel 2
low
high
Channel 3
high
low
Channel 4
high
high
3.4.2.3 RADIO OPERATING PARAMETERS
The Radio tab allows user programming of various radio operating parameters.
Radio
This field designates the radio model.
Range
This field designates radio frequency range.
Channel Bandwidth
This field specifies whether the unit is half-channel (12.5 kHz) or full-channel (25 kHz).
Synthesizer
Synthesizer displays the type of synthesizer used on the RF circuit board (SA7025 or SA706).
Figure 23 - Radio Setup Parameters Screen