Re: [time-nuts] Ashtech Z-12 firmware?
Gregory, On 08/27/2016 01:34 AM, Gregory Maxwell wrote: I recently picked up a couple non-functional Ashtech Z-12 receivers with the external frequency input (these appear to PLL an internal TCXO; I understand there are other models where they replace the TCXO completely). I was hoping to use them both better data sources for common view time transfer with better performance than the GPS L1/CA that I've been using; as well as using them for ground truth data for a SDR semi-codeless CRPA receiver I'm slowly building. These units were hanging at startup at "Downloading channel". I determined that they would work a single time if the memory were cleared (by holding an arrow, right for external up for internal, during start). Because the internal 3.6v primary cell batteries were reading about 40mv I took a guess that the low battery was causing memory corruption across restarts. New batteries and a bit of soldering later, and they are working reliably across restarts, locking sats on L1/L2, talking on RS232, etc. (hurrah). Hopefully this message in the archives is useful if someone else encounters similar symptoms. Thanks for that. One of my Z12s have that issue, so now I know it is battery related. Many thanks for that! Before I go further I was wondering if anyone knew of a source for firmware for these old units? One of mine is marked "Z-12 700751-6 (b)", unfortunately it seems ashtech has been sold many times, and the old web/ftp sites have been scattered to the wind. Indeed. It used to be available, now one has to look for it. I'll send you what I could locate quickly. Cheers, Magnus ___ 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.
Re: [time-nuts] Ashtech Z-12 firmware?
Hi Gregory, For a long time ftp://ftp.ashtech.com was useful. -- Björn Sent from my smartphone. Original message From: Gregory Maxwell <gmaxw...@gmail.com> Date: 27/08/2016 01:34 (GMT+01:00) To: Discussion of precise time and frequency measurement <time-nuts@febo.com> Subject: [time-nuts] Ashtech Z-12 firmware? I recently picked up a couple non-functional Ashtech Z-12 receivers with the external frequency input (these appear to PLL an internal TCXO; I understand there are other models where they replace the TCXO completely). I was hoping to use them both better data sources for common view time transfer with better performance than the GPS L1/CA that I've been using; as well as using them for ground truth data for a SDR semi-codeless CRPA receiver I'm slowly building. These units were hanging at startup at "Downloading channel". I determined that they would work a single time if the memory were cleared (by holding an arrow, right for external up for internal, during start). Because the internal 3.6v primary cell batteries were reading about 40mv I took a guess that the low battery was causing memory corruption across restarts. New batteries and a bit of soldering later, and they are working reliably across restarts, locking sats on L1/L2, talking on RS232, etc. (hurrah). Hopefully this message in the archives is useful if someone else encounters similar symptoms. Before I go further I was wondering if anyone knew of a source for firmware for these old units? One of mine is marked "Z-12 700751-6 (b)", unfortunately it seems ashtech has been sold many times, and the old web/ftp sites have been scattered to the wind. The nearest I was able to find was this page http://kb.unavco.org/kb/article/astech-micro-z---firmware,-firmware-release-notes,-firmware-upload-programs-and-how-to-use-them-368.html with micro-Z firmware. [If there is a relevant GNSS nuts list, I'd be glad to hear about it-- my interest is in CVTT but perhaps somewhere else there is a den of people obsessed with old survey hardware that would prefer these questions.] ___ 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.
[time-nuts] Ashtech Z-12 firmware?
I recently picked up a couple non-functional Ashtech Z-12 receivers with the external frequency input (these appear to PLL an internal TCXO; I understand there are other models where they replace the TCXO completely). I was hoping to use them both better data sources for common view time transfer with better performance than the GPS L1/CA that I've been using; as well as using them for ground truth data for a SDR semi-codeless CRPA receiver I'm slowly building. These units were hanging at startup at "Downloading channel". I determined that they would work a single time if the memory were cleared (by holding an arrow, right for external up for internal, during start). Because the internal 3.6v primary cell batteries were reading about 40mv I took a guess that the low battery was causing memory corruption across restarts. New batteries and a bit of soldering later, and they are working reliably across restarts, locking sats on L1/L2, talking on RS232, etc. (hurrah). Hopefully this message in the archives is useful if someone else encounters similar symptoms. Before I go further I was wondering if anyone knew of a source for firmware for these old units? One of mine is marked "Z-12 700751-6 (b)", unfortunately it seems ashtech has been sold many times, and the old web/ftp sites have been scattered to the wind. The nearest I was able to find was this page http://kb.unavco.org/kb/article/astech-micro-z---firmware,-firmware-release-notes,-firmware-upload-programs-and-how-to-use-them-368.html with micro-Z firmware. [If there is a relevant GNSS nuts list, I'd be glad to hear about it-- my interest is in CVTT but perhaps somewhere else there is a den of people obsessed with old survey hardware that would prefer these questions.] ___ 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.
