More likely the missing GPS receiver board is installed over the ground plane. Bruce
On Sunday, 5 June 2016 4:11 PM, Hui Zhang <ba...@163.com> wrote: Dear group: Does anyone familiar with this Symmtricom GPSDO board? I have searched on internet but I have not found any manual or technical infomation about it. It seems can use a RS-232 cable and simple SCPI or serial command to control it, just like HP 58540 or other GPSDO board that I had, and there is a blank place on PCB that seems can install a big OCXO or SUB-Board? I don't sure, so I would like to find more detail of this board, it has a reasonable price so I can get one. Any information will be appreciated. Here is the some pictures. http://www.dz98.com/tp/an78-3.jpg http://www.dz98.com/tp/an78-1.jpg Regards. Hui Zhang /BA6IT _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.