Truetime 560-197-5 DRC & Distribution System Chassis  - Page 1
Forum section: electronics / testgear

author: Johnny10
author_rank: Frequent Contributor
timestamp: June 18, 2018, 05:18:28 pm
content: I just purchased this Truetime 560-197-5 Data Rate Clock & Distribution System Chassis Power Supply and it has a few faults.Wondering if anyone knows of source for manuals Service or Operating.Unit has Rubidium GPS -XL2 and Oven based cards.

author: Johnny10
author_rank: Frequent Contributor
timestamp: June 19, 2018, 07:54:18 pm
content: GPS XL-2 Card

author: cncjerry
author_rank: Unknown
timestamp: June 21, 2018, 07:55:45 pm
content: send a note to Texaspyro, Mark Simms, ask him if he knows anything about it. They try the time-nuts archive if you haven't.

author: Johnny10
author_rank: Frequent Contributor
timestamp: June 21, 2018, 08:23:36 pm
content: I will try that. I did email time-nuts.Wrote Microsemi support this morning seems this unit was still in the 2012 Symmetricom Catalog.Thinking may still have manuals.

author: edpalmer42
author_rank: Super Contributor
timestamp: June 21, 2018, 08:56:08 pm
content: Not much to it, but it might get you started...https://web.archive.org/web/20130516204342/http://www1.symmetricom.com/media/files/support/ttm/product-manual/man-560-197-5.pdfEd

author: Johnny10
author_rank: Frequent Contributor
timestamp: June 21, 2018, 09:51:10 pm
content: I have tried that WWW1 site about a dozen times and cannot get my service to download from there.Thank you for your time.Received message back from Microsemi they have manual still available.That unit was discontinued in 2016.

author: edpalmer42
author_rank: Super Contributor
timestamp: June 21, 2018, 10:08:23 pm
content: Hmmmm. I'm not sure how that https ended up on the front of that link. Change it to http.Ed

author: texaspyro
author_rank: Super Contributor
timestamp: June 22, 2018, 03:40:51 am
content: Quote from: cncjerry on June 21, 2018, 07:55:45 pmAlas, I know nothing about these...

author: Johnny10
author_rank: Frequent Contributor
timestamp: June 22, 2018, 04:31:46 am
content: OK I was able to download very complete manuals for 560-5203-3, 560-5202 GPSDO modules.Thanks to edpalmer42 making me rethink the web address for Symmetricom.The manual for 560-197-5 chassis is just that a very basic manual describing the base unit and its features.The real data is available for individual plug-ins.And as I said I have a GPSDO with Rubidium oscillator, a GPSDO with XCXO oscillator and a crystal oscillator plugin.Lots of reading ahead.Will get back to you once everything is up and running.

author: Ernie
author_rank: Newbie
timestamp: February 06, 2021, 01:26:35 pm
content: I need help also,I have a TrueTime Rubidium GPSDO Model 151-602-556 MK III SYS ver 021 S/N 99040503......very seldom used but the last time no GPS signal received and all the present location entered just changed a few min after.......My first idea was the 3,5 Volt battey has low voltage..../ about 2,6 Volt / replacing this still the same..... the local position entered has changed after let say 15-25 min..... and no one gps sat received after 40-50 min.....any idea where to look for the trouble....

author: Johnny10
author_rank: Frequent Contributor
timestamp: February 06, 2021, 02:09:23 pm
content: You might try the following EEV thread.https://www.eevblog.com/forum/projects/symmetricom-truetime-xl-dc-gpsdo/25/