Specifications

Company Confidential 63 Raveon Technologies Corp.
Receive Audio into the modem (13)
Connect the receiver’s FM discriminator output to this input. Do not connect this
to the speaker audio.
Transmit Modulation out of the modem (6)
Connect this audio output to the radio’s transmit audio input. It must be DC
coupled to the radio’s modulator (no series capacitors). There is a 1.65V DC
bias on this line, and the transmit audio modulation level is adjustable with the
ATR0 command.
RSSI Input (12)
If the external radio has an analog RSSI signal strength indication, connect it to
the RSSI input if you wish to use RSSI as a qualifier for reception. In most cases
this is not necessary, but if the modem is configured to prohibit transmission on
busy channels, the RSSI must be connected and calibrated so that the modem
can check for busy channel.
17.5. Calibration
Once the modem is connected, perform the radio alignment steps as described
in Section 10.