N4IQT has nice photos of the Comsync (outside and inside) http://www.n4iqt.com/comsync/ You can see the EPROM (v1.63 , 1998 date) http://www.n4iqt.com/comsync/gpsdo003.JPG Looks like an 8-channel Motorola Oncore receiver http://www.n4iqt.com/comsync/gpsdo001.JPG Upclose http://www.n4iqt.com/comsync/gpsdo007.JPG greg —- Date: Fri, 23 Mar 2018 20:50:40 -0000 From: "Rob Kimberley" <robkimberley@btinternet.com> To: "'Discussion of precise time and frequency measurement'" <time-nuts@febo.com> Subject: [time-nuts] Odetics Telecom CommSync - GPS Rollover Problem. Sent from iPad Air