What time synchronization signals are available to stations from the Satellite Operating Support System (SOSS) computer?
SOSS computers provide two ways to sync external clocks. The first is a contact closure that activates once per hour (at the top of the hour, natch). The second is a data packet that is sent every ten seconds to all Serial Control Buses (SCBs) connected to the SOSS computer. The time signal is *not* SMPTE timecode. It has the same format (both electrical and data) as the time of day data currently available on the back of the old DACS Netcue Receiver Decoder (DNRD). Any external clocks that a station has connected to the DNRD that can decode time sync packets are automatically compatible with the new SOSS. It is not a continuous data stream like SMPTE timecode. The internal clocks of SOSS computers are synchronized to network time through their connection to the 64,000 bit per second Downlink Services Channel (DSC) data stream, which also periodically sends time updates. While the Public Radio Satellite System operates in Eastern time, you can set up your SOSS computer with an offset t
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