[time-nuts] Trimble Thunderbolt no longer determines thecorrect date

The current model Thunderbolt E #60333-50, v1.04 firmware has a last valid date on the 22nd December 2029. It is probably a good idea to specify what firmware you have in these discussions as different versions will have different properties, and some of the used Thunderbolts are quite

Re: [time-nuts] ADEV query Timelab and TICc

The 1 PPS signal is derived from an 81 MHz clock (12 ns) on the GPS chip according to the Skytraq manual. So that would mean n * 12ns. From: time-nuts-requ...@febo.com Sent: ‎3/‎20/‎2017 9:00 AM To:

[time-nuts] 58503a and Yixunhk

I’ve never had a problem with this vendor. I’ve purchased a Z3801a, and a Z3805a and both work fine, and I have the equipment to measure that. I’ve also purchased several items of agilent test gear from this vendor, and they all worked fine, and were accompanied by a test and calibration form

Re: [time-nuts] What's best an HP 58503A, Z3805A, or Z3801A

Some Furuno GPS in these GPSDOs (in particular the z3815a) were recently reported to suffer from a roll-over problem which causes the year to be incorrect. So you might want to check that before purchasing. It's a pity, the Furuno is a better receiver than the UT+. You can search the

[time-nuts] Lucent GPDSO TTI ps graph and efc is this sick?

The EFC is probably not sick, it is still in the middle of it's range, and has moved only a small amount. I would let it run for another week and see if it starts to head back down. As I mentioned in a previous post, I had to run my z3816a for several weeks before it settled down. After

[time-nuts] Lucent KS 24361 and Z 3816a Performance

I wanted to share an observation about my Z3816a which may be relevant to KS 24361 users. Both units use the same oscillator and GPS receiver. When I first powered up my Z3816a, I noticed there were very infrequent Time Interval offset spikes of 100 ns or more. Once every 4 days to start,

[time-nuts] Lucent KS-24361 GPS and Performance

I am curious about which GPS and rev is used in these units. Could someone post the response from :DIAG:IDEN:GPS? from one of these units? Also, I'm curious if anyone has a Z38XX plot for one of these devices that has been in operation for greater than 48 hours, I'm particuarly interested in

Re: [time-nuts] GPS Lightning Protection

Dave M, The advice about a 'system approach' is essential, or the lightning discharge may go through your building wiring instead of through your ground rod. Or, a lightning strike down the street may follow the power line, pass through your home wiring, GPS receiver, and into your GPS