Saturday, January 12, 2008

Alarm relay modification for Comstream demods

An engineer at public radio station KPLU, Lowell Kiesow, has shared a modification to the Comstream ABR700 demods that are now in use for the Squawk channel. This mod implements an EbNo Threshold Alarm contact that is listed in the manual, but was not installed by the PRSS. It is useful to set this as a way of getting notified of satellite system problems, most often as a "snow in the dish" alarm. It was posted with this disclaimer:

Official sounding legal disclaimer: If you break your satellite demod, burn yourself soldering, or get electrocuted, it's not my fault, or the fault of my employer. Don't go crying to the PRSS folks, either. :-)
Link to modification

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