User's Manual

CONNECTORS
CONNECTORS ON THE RFU
E
NVOY™ TRANSCEIVER REFERENCE MANUAL 331
NOTE: External alarm relay is an internal link that may select normally open
or normally closed. It can be configured to switch to ground or the
A rail.
NOTE: The 600  output option is selected by internal links.
NOTE: The second audio function requires an additional audio PCB to be
fitted.
Related links:
Morse input on page 331
PTT on page 331
Q line on page 332
Relay contact on page 332
Serial data on page 332
System power (A rail protected) on page 333
Tx audio input on page 333
System audio output on page 333
Morse input
When a ground is detected on the morse input, the transceiver generates a morse tone
on air. This functionality is typically provided with a morse key.
PTT
This function puts the transceiver into transmit mode and enables the audio transmit
path via the 15-way connector (pins 5 and 15).
13 Quiet (Q) line
(Audio 2 In)
Input 5 V TTL logic active high
when Data selected
5 V TTL logic active low
when all other devices
selected
14 System audio
unbalanced, or
600  balanced audio
Output 600  audio 1 V p–p, or
600  balanced audio
15 Tx audio (10 k
balanced)
Input 300 mV p–p ALC
threshold
Table 23: Pinouts of the 15-way connector (cont.)
Pin no. Function Input/output Signal level