Re: [time-nuts] TrueTime XL-AK Issues

Hi My guess would be that they are not in a mode that allows them to lock. Some GPSDO’s require a “start” command. Others hold off locking until a site survey is complete ( or they have verified the last survey is correct ). Bob > On May 23, 2018, at 1:31 PM, Richard Solomon

Re: [time-nuts] TrueTime XL-AK Issues

Wow They actually came up. A site survey can take some 20 hours. There should be some LED indicator that says the status is locking. Let them run a day or two. If there is a LI battery to retain information that may be long gone. Replacing that would give you a fatser start. Had to do this on some

Re: [time-nuts] 5950 Crystal impedance meter manual

Hello, on the website of my company you can find a list of papers on the subject of crystal measurement techniques. http://www.axtal.com/English/TechnicalNotes/TechnicalArticlesPublications/LiteratureaboutQuartzCrystals/ The actual standard procedure for crystal measurement is by using modern

[time-nuts] Some comments on GPS timing

Perhaps it is time that I step in to point the newer members of Time-Nuts to some of the historical (hysterical?) info on using  GPS to achieve sub-microsecond global timing sync. I refer you all to the website http://gpstime.com   that Rick Hambly (http://cnssys.com) maintains to document

Re: [time-nuts] TrueTime XL-AK Issues

In further button pushing, I found the Date was 1998 !! So, I manually reset the Date and Time and it's now doing a Satellite search. The previous measurements must have been some artifact of Holdover. One is now merrily searching, I'll let it run for a while. And, I think you are correct,

Re: [time-nuts] Motorola GPS Antenna?

Clint, You have found a Motorola Timing2000 GPS antenna. Please see the Timing2000 GPS Antenna Specifications and Timing2000 GPS antenna technical presentation on this page: http://www.synergy-gps.com/index.php?option=com_content=view=42=89 This was a popular, Motorola designed GPS antenna

Re: [time-nuts] TrueTime XL-AK Issues

Great to hear let us know how it turns out. Regards On Wed, May 23, 2018 at 4:58 PM, Richard Solomon wrote: > In further button pushing, I found the Date was 1998 !! So, I manually > reset the Date > > and Time and it's now doing a Satellite search. > > > The previous

Re: [time-nuts] Ublox M8T question

On Wed, May 23, 2018 at 5:17 PM, Mark Sims wrote: > I recently got in a Ublox M8T board in from CSGSHOP. The M8T supposedly > outputs raw measurements (carrier phase, pseudorange, doppler) for all the > sat systems it supports, but I am only getting raw measurements for

[time-nuts] Ublox M8T question

I recently got in a Ublox M8T board in from CSGSHOP. The M8T supposedly outputs raw measurements (carrier phase, pseudorange, doppler) for all the sat systems it supports, but I am only getting raw measurements for GPS and SBAS... no Glonass or Galaileo.Any ideas why? Has anybody gotten

[time-nuts] Ublox M8T question

I have it working now.The problem was the way I was interpreting the satellite system gnssid:svid values in the RAWX message. Basically the data for all the sat systems were being mapped to GPS prns. Heather has a command for configuring which GNSS constellations that you want to use.

Re: [time-nuts] 5950 Crystal impedance meter manual

Hi Gizmo’s like that were very common in the days before network analyzers became good enough to measure a crystal. They always were a troublesome item to keep running accurately. Without accuracy, their value was a bit limited. Every place I know of had a big drawer ( or cabinet ) of “magic

Re: [time-nuts] 5950 Crystal impedance meter manual

Hi Luciano: I have some web pages about crystals and testing them: http://www.prc68.com/I/CrystalImpedanceMeters.html - Crystal Impedance Meters (Saunders 150) http://www.prc68.com/I/Xtal.shtml#TE - Crystals in general & Test Equipment (see Trivia below) http://www.prc68.com/I/Xam.html -

[time-nuts] TrueTime XL-AK Issues

I have had two of these sitting on the shelf for years. Today I decided to see if they work. It's a slow week !! I hooked them up to my external GPS Antenna through my Symmetricon Splitter and looked at the 10 MHz output on my HP 5334B (reference input derived from a Trimble T-Bolt). They