Specifications

Company Confidential 62 Raveon Technologies Corp.
8
No Connect
9
No Connect
10
No Connect
11
Keyline
In RX mode, this is and open-drain circuit. In TX mode, it is
pulled to ground with approximately a 10 ohm impedance.
12
RSSI In
Optional signal. Analog RSSI from external radio to the FireLine
modem. Unused in most applications. May be use dto signal
BUSY Channel to the modem. High-busy, low=not busy.
13
RX Audio
Wide-band receive audio input. Must be DC coupled to the
radio FM discriminator. Flat response from 0 to 4800Hz. Signal
must be analog, between .5 and 2.5V DC.
14
Mod Adjust
DC voltage to adjust external modulation balance. Unused in
most applications.
15
DC In/Out
9-16VDC. Directly connected to the DC input jack of the
FireLine.
17.4. Connections
DC Power
Connect 12.5V DC to the RV-M5-X’s DC power input connector on the front-
panel of the RV-M5.
Connect the external radio to its DC power source using its own DC power cable.
Note, may radios draw many amps of power, and the power source must be
capable of supply adequate amperage.
Ground (1)
Be sure the ground connection on the modem (pin 1) and the radio’s signal
ground are well connected.
Transmit Signal (optional) (3)
Pin 3 of the radio interface connector is the alternate transmit keyline. It will go to
5volts whenever the transmitter should be on. It will be low (near 0V), when the
external radio should be the receive mode.
If the external radio requires a low signal to key the transmitter, do not use this
signal. Use the following “KeyLine” line instead, pin 11.
Receiver Enable (optional) (4)
This output will go high when the unit is to be in the receive mode, and low when
transmitting.
KeyLine Signal (1)
Pin 1 of the radio interface connector is the primary transmit keyline. It will go to
ground whenever the transmitter should be on. It will be high or floating when
the external radio should be the receive mode.