Joe, In a way, the VP Service Note: http://www.synergy-gps.com/images/stories/ShopTalk/vp_service_note.pdf ties into the VP Oncore Startup Note because it is associated with the VP Oncore's Pendulum oscillator.
Back in the late nineties, some customers noted that VP Oncore signal strength diminished over time when operating 24/7/365. Motorola determined that the decreased sensitivity was caused by crystal aging which is normally corrected every time the VP is power-cycled. Power-cycling lets the VP write the appropriate, aged, oscillator characteristics to EEPROM to reset the VP to its expected performance range. If you note signal strengths being reduced over time, then it would be wise to power-cycle your VP - Otherwise, just let it run. Art -----Original Message----- From: time-nuts [mailto:[email protected]] On Behalf Of Joseph Gray Sent: Tuesday, April 26, 2016 2:14 PM To: Discussion of precise time and frequency measurement <[email protected]> Subject: Re: [time-nuts] Z3801A recovering Art, Thanks for the link. Very useful information. I also read the 'VP Service note" posted there. Is that note also referring to the oscillator, or some other component that needs periodic recalibration. In any case, it seems that they are recommending that we power down our GPSDO units every few months. Not something I'd like to do, considering it would take a while to stabilize again. Joe Gray W5JG On Tue, Apr 26, 2016 at 12:39 PM, Art Sepin <[email protected]> wrote: > Joe, > > There is a "VP Oncore Startup" note here that's worth a try: > > https://na01.safelinks.protection.outlook.com/?url=http%3a%2f%2fwww.sy > nergy-gps.com%2findex.php%3foption%3dcom_content%26task%3dview%26id%3d > 42%26Itemid%3d89&data=01%7c01%7cart%40synergy-gps.com%7c1cb76a2494c44f > 59344908d36e1e9356%7cc81f9fdec0e04d8c95779afaa0cad9ed%7c1&sdata=voZraL > rW%2bW827wV3qF8HsbZaRda09LAvawpb3DCk4wg%3d > > Please note that if the above link expands to more than one line after it > leaves our server it is due to our use of MS SafeLinks app in Outlook. If the > link is not active, just go to: > Synergy-gps.com\Tech Support\ Shop Talk and scroll down to the start-up note. > > Art Sepin > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://na01.safelinks.protection.outlook.com/?url=https%3a%2f%2fwww.febo.com%2fcgi-bin%2fmailman%2flistinfo%2ftime-nuts&data=01%7c01%7cart%40synergy-gps.com%7c1cb76a2494c44f59344908d36e1e9356%7cc81f9fdec0e04d8c95779afaa0cad9ed%7c1&sdata=cl71pF8Sa3iYj%2bovgNzG0%2bQQMjaJlugHnpI7Jdm591c%3d and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
