CONNECTORS
CONNECTORS ON THE RFU
E
NVOY™ TRANSCEIVER REFERENCE MANUAL 369
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 Ω output option is selected by internal links.
NOTE: The second audio function requires an additional audio PCB to be
fitted.
Related links:
Overview of peripherals on page 192
Morse input on page 369
PTT on page 369
Q line on page 370
Relay contact on page 370
Serial data on page 370
System power (A rail protected) on page 370
Tx audio input on page 371
System audio output on page 371
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 Ω balanced audio
Output 600 Ω audio 1 V p–p, or
600 Ω balanced audio
15 Tx audio (10 kΩ balanced) Input 300 mV p–p ALC threshold
Table 23: Pinouts of the 15-way connector (cont.)
Pin no. Function Input/output Signal level
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