DCB PAS v2 Руководство пользователя - Страница 11

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Chapter 4

Operation

This chapter explains how to use the PAS.

The application below shows the PAS used with Loop AM3440 channel banks for remote control of a

transceiver from two different locations. Push to talk at the controller positions on the left is passed across

the link using E&M signaling. One of the two positions is priority, the other one is secondary. The receive

audio is always passed back from the radio to both controllers.

OUT Pins 6 and 3 are always bridged to both PRIORITY and SECONDARY pins 6 and 3. This allows

audio input from the OUT port to flow back to the PRIORITY and SECONDARY port.

OUT pins 8 and 7 are also always bridged to both PRIORITY and SECONDARY input pins 8 and 7. This

is allows M and SB/MB leads from the OUT side to flow back to the PRIORITY and SECONDARY port..

While PRIORITY port pin 4 is grounded to chassis (PTT activated), OUT pin 4 is grounded to chassis

(PTT to the transmitter), PRIORITY pins 2and 1 are connected to OUT pins 2 and 1(audio input from the

PRIORITY port sent to the transmitter).

While PRIORITY port pin 4 is open (PTT not activated), OUT pin 4 is connected to SECONDARY pin 4

(forwarding the state of the SECONDARY PTT), and SECONDARY pin 2 and 1 are connected to OUT

pins 2 and 1 (audio input from the SECONDARY port sent to the transmitter)