====== Synchronizing system time to GPS time ======

Pinouts:
Pin 5: ground (GPS and DB9 side)
Pin 9: PPS (GPS side out, DVR side in)

The receiver outputs the PPS signal on pin 12 of the receivers Conxall ports, but if you are using the standard P/N 30945 power/data cable to run the receiver the PPS strobe is output on pin 9 of the DE9 serial connector. The PPS signal is output as long as the receiver has a position fix and does not need to be enabled or configured from the receiver.

  * From the //File// menu, select //Install/Uninstall Filter// and choose //Timing Filter//
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  * In the next window click //Add//, Streams5 will open a dialog box that defaults to the Streams5 timing filter directory
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  * Select the //SPAN Timing Filter// dll file. If you don't have it installed for some reason, download and install it now: {{ documentation:spantimingfilter.zip }}
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  * Now the filter is installed and you will see it in the installed filters window. Click on "done" to proceed
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  * We must configure the filter, so from the //DVR// menu choose //Timing Filter Setup//
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  * You will see the following window with a drop down box that is defaulted to the system time
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  * Select the SPAN Timing Filter that you just installed and click on close. You may wish to configure the filter - right now there's only one option that you can change, and that is turning logging on / off.
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  * Now we have to configure the video boards (CL160) to synchronize their on-board time with the PPS signal using the SPAN filter. You only need to do this for **one** device, since the setting will be applied to both CL160 boards. Right-click on a camera and select //Configure Device//
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  * Navigate to the //Timestamp Settings// tab and make sure that the //Current Timing Filter// lists SPAN Timing Filter, that it's set to //Enable triggered resync//, and that, very importantly, the filter is set to **TTL Input 1**. Click on "OK" to save the settings and close the window.
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  * In the Streams5 log file (accessible through Ctrl+Alt+L or Display Menu) you should see synchronization messages similar to the following:
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  * If you see warnings in the log window such as these, you may have an old version of the SPAN filter, which doesn't support simultaneous sync requests from 2 CL160 cards.  You can get the new version {{ documentation:spantimingfilter.zip | here}}
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