CONNECTORS
CONNECTORS ON THE DESK CONSOLE
376 ENVOY™ TRANSCEIVER REFERENCE MANUAL
8-way connector
The 8-way connector is on the back panel of the desk console. It is a male Nisshin
NS1508 or equivalent. It is used to interface to an external foot-switched PTT,
headset, microphone or morse key.
Figure 83: Front view of the 8-way connector
Table 26: Pinouts of the 8-way connector
Pin no. Function Input/output Signal level
1 Ground 0 V
2 External microphone Input To suit electret microphone
3 Bias for Electret Output +5 V via 3k2 resistor
4 PTT Input Active low, pull-up to 3.3 V
5 External earpiece Output 20 mW max into 16 Ω
6 Ground 0 V
7 +5 V supply Output +5 V, 100 mA max
8 External morse key Input Active low, pull-up to 3.3 V
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