Park Air T6M, Руководство пользователя, Страница: 34 / 70

Table 6. Base station Facilities Connector Pin-Out
Base Station's
Facilities
Connector Pin
Number
Signal
Input or
Output
Description
1 Ground - 0 V.
2
3
Tape +
Tape -
Output
A balanced 600
W
twisted pair providing audio to drive
a tape recording system. The output level is 0 dBm
(sine wave on 600
W
) for 85% modulation depth.
4
Audio operated
squelch
Output
0 V when received audio having a modulation depth
>20% is present. Open circuit at other times. This
signal can be used as an external ‘busy’ indication.
5
6
7
8
9
10
Control Desk Rx +
Control Desk Rx -
Control Desk Tx +
Control Desk Tx -
Control Desk PTT +
Control Desk PTT -
Output
Input
Input
A 6-wire system comprising two 600
W
twisted pair
balanced lines for Rx and Tx audio, plus a line pair for
PTT.
The audio line levels are 0 dBm (sine wave on 600
W
)
for 85% modulation depth. PTT can be activated either
by shorting together the PTT lines, or by phantom
keying on the Tx lines. Note that Control Desk PTT - is
internally connected to 0 V.
11
12
13
Not connected
Not connected
Not connected
- -
14 External Tx inhibit Input
When this line is connected to 0 V, the base station
cannot be keyed.
15 Ground - 0 V.
T6M Base Station User Guide
Page 34