Motorola Oncore data as applied in Z3801A - Page 1
Forum section: electronics / general

author: Yrrah
author_rank: Contributor
timestamp: June 14, 2020, 02:29:49 pm
content: Hello learned group,I have a Z3801A (3542A00410) that (after many years of good service) gives an error indicating the Motorola Oncore GPS receiver is defect. I ordered a new one via ebay and got a newer version from about year 2000/2001 with a rechargeable battery. Formfactor the same, electronics rather different. This one does not work unfortunately: a red led inside the Z3801 indicates that (as well). Could be some configuration issue. I'd like to get some hints on the different versions of the Oncore as there seems some incompatibility. Any other hints welcome.Best regards,Harke

author: ArthurDent
author_rank: Super Contributor
timestamp: June 20, 2020, 11:19:38 pm
content: There are a few Motorola Oncore receivers (VP, UT, GT) that have the same form factor but they are quite different. I believe the one that will work in the Z3801A is the VP 8 channel that will only report 6 channels like the original receiver timing receiver the Z3801A was designed to use. Some Googling should confirm which receiver is correct. Note that there are different orientations of the input connector. Make sure you get one that matches the receiver you took out of your Z3801A

author: testpoint1
author_rank: Frequent Contributor
timestamp: July 06, 2020, 04:34:16 am
content: I already replace 8 channel GPS (left one) to a 12 channel GPS, that is OK since it also include the Motorola special protocol.

author: doktor pyta
author_rank: Frequent Contributor
timestamp: July 06, 2020, 11:15:30 am
content: testpoint1,could You share the type of this 12ch receiver ?http://www.ilotus.com.sg/m12m_timing_oncore/?

author: bingo600
author_rank: Super Contributor
timestamp: July 07, 2020, 06:28:36 pm
content: Could be this guyNavman Jupiter (Some of them do Moto binary)https://www.ebay.com/itm/Navman-Jupiter-GPS-Module-TU-60-GPS-Module-1PPS-10-Khz/264782973673

author: testpoint1
author_rank: Frequent Contributor
timestamp: July 07, 2020, 06:55:51 pm
content: label is TU60, interface same.and the end solution is using the U-blox LEA M8 module replace it, then you will upgrade the GPS module from 1995 to 2020 GNSS module:https://synergy-gps.com/products/gps/timing-boards-modules/

author: testpoint1
author_rank: Frequent Contributor
timestamp: July 30, 2020, 08:06:12 pm
content: BTW, I tested the TU60 GPS, can NOT use the Z3801A or Z3805a, alarm occur.

author: notfaded1
author_rank: Frequent Contributor
timestamp: August 01, 2020, 03:45:14 pm
content: So the ublox LEA M8 works with Z3801A Scott? Do you have to put it in some comparability mode to work?Bill

author: bingo600
author_rank: Super Contributor
timestamp: August 02, 2020, 05:41:22 am
content: Have you installed one of the LEA units in a Z3810 w. success ?What's the price of the LEA (Z3801) Compatible unit ?/Bingo

author: FriedLogic
author_rank: Regular Contributor
timestamp: August 03, 2020, 07:04:00 pm
content: Quote from: notfaded1 on August 01, 2020, 03:45:14 pmA ublox on its own won't work. The boards that Synergy do have an interface built in to convert the data between the GPS receiver that they use and whatever format they are emulating.I think that some of the old Motorola VP receivers can be made to work, but it would have to be a timing version without the timing pulse related bugs that some had.Here are a couple of time-nuts threads on this:https://lists.febo.com/pipermail/time-nuts_lists.febo.com/2010-June/030531.htmlhttps://lists.febo.com/pipermail/time-nuts_lists.febo.com/2008-June/014378.html

author: testpoint1
author_rank: Frequent Contributor
timestamp: August 04, 2020, 01:18:35 am
content: Quote from: notfaded1 on August 01, 2020, 03:45:14 pmno, still in testing. I just wait the sample board from factory.

author: w9gb
author_rank: Contributor
timestamp: September 19, 2022, 12:36:21 pm
content: I recently ordered a replacement (Synergy SSR-UT+/VP Replacement) for the Motorola Oncore receiverin my HP/Symmetricom 58503B from Synergy Systems. When I sent Art Sepin digital photos of my 58503B (later model of original HP design), he was able to quickly identify GPS receiver design updates that Symmetricom performed.My Symmetricom 58503B used the Motorola M12+ 12-channel GPS board with a Goshay Adaptor Board (VP/UT form factor).https://synergy-gps.com/wp-content/uploads/2021/10/EOL-M12M-GPS-receiver-2021.pdfThe new Synergy single-board replacement receivers (SSR) far surpass the performance and features of the original 6 and 8 channel Motorola VP Oncore OEM GPS receiver boards introduced in 1994, and the 8 channel UT+ Oncore introduced in 1998.Current Synergy back order is about 28 weeks (COVID recovery for some parts, uBlox, EEPROM).I expect to receive this new Synergy SSR board at end of 2022 (early 2023 due to Holiday logistics).https://synergy-gps.com/synergy-products/ssr-series-ut-vp-single-board-replacement/SSR Series UT+/VP Oncore Single-Board replacementDatasheet (June 29, 2022)https://synergy-gps.com/wp-content/uploads/2022/05/SSR-VP_UT-Single-Board-Datasheet-062922.pdfSynergy Systems, LLC9950 Scripps Lake DriveSuite #106San Diego, CA, 92131 USAhttps://synergy-gps.com/E-mail: oeminfo@synergy-gps.comTelephone: +1 858 566 0666Synergy president: Art Sepin==greg, w9gb

author: TheSteve
author_rank: Unknown
timestamp: September 19, 2022, 03:46:59 pm
content: Can you share the pics of the inside of your 58503B please?