User's Manual

CONNECTORS
CONNECTORS ON THE RFU
E
NVOY™ TRANSCEIVER REFERENCE MANUAL 333
The operating parameters can be set to the following:
System power (A rail protected)
System power is switched off when the transceiver is switched off.
WARNING: The total load connected to the A rail protected supply must not exceed
2A.
Tx audio input
Audio input from external equipment, for example, data modems, is connected
between pins 5 and 15 and is a balanced floating input. The input signal should be
nominally 1 V p–p and not exceed 3 V p–p.
System audio output
This supplies Rx audio at a default level of –13 dBm. This can be varied from –31 to
0.5 dBm using the RFU Rx Out Audio Level entry in User Data > Peripherals.
There are other entries that enable other parameters like Easitalk™ and mute.
System audio output is normally unbalanced and connected to pin 14. The transceiver
can also be internally reconfigured to provide balanced 600  audio output from
pins 14 and 7. In this mode, the relay contacts can only be used by switching pin 6 to
either ground or the battery volts.
Data rate 300, 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200,
230400 bit/s
Data bits 8
Stop bits 1
Parity None