Salem Radio Network - Tech Supplemental Notes for Starguide III

There are 4 relays mounted on each audio card. Each relay has both pins available on the Aux Output (Digital I/F) connector on the rear of the receiver.

On services like DGNNet and Salem, where they share the channel with another audio service on the other side, the 4 relays are shared between the two services.

The relays are shared in the following fashion:

The left channel of the audio stream has the first and third relays.
The right channel of the audio stream has the second and fourth relays.

Since the relays are not numbered as "1" through "4", though, some confusion may result.

Relay "0" is really the first of the four on-board relays on the audio card.
Relay "1" is the second of the four on-board relays.
Relay "2" is the third of the four on-board relays.
Relay "3" is the fourth of the four on-board relays.

As such, the left audio channel has control of the relays numbered "0" and "2", while the right audio channel has control of the relays numbered "1" and "3".

Therefore, SRN controls relays 1 and 3 for the "Salem" channel (since it's on the right side of its dual mono channel). We currently use StarGuide relay 1 to trigger local commercial breaks and StarGuide relay 3 for local station liners.
Likewise, SRN controls relays 0 and 2 for the "DGNNet" channel (since it's on the left side of its dual mono channel). We currently use StarGuide relay 0 to trigger local commercial breaks and StarGuide relay 2 for local station liners.