Re: [time-nuts] Trimble Thunderbolt and David Partridge divider boardquestion

For those of you who want to follow the link Chris provided without his personal google search metadata, the correct URL is: http://www.perdrix.co.uk/FrequencyDivider/Frequency%20Divider%202.pdf /tvb - Original Message - From: "Chris Wilson" To: "Discussion

Re: [time-nuts] UPS for my time rack

My apologies in advance for further putting tension on this OT thread, but one of the great stories from the early days of Usenet concerned a really large UPS system for a data center. In the late 80s the Digital Equipment Corp VAX computer was among the most powerful you could buy. If you can

[time-nuts] Trimble Thunderbolt and David Partridge divider board question

12/10/2015 14:58 I have had my Trimble and Dave's divider board for many years and it's on 24 hours a day, seven days a week, no problems.

Re: [time-nuts] Jackson Labs M12M Replacement Receiver

Tom, The JLT M12M replacement receiver should work in the Commsync II. If you find any issues we would work to fix them a firmware update. Keith Keith On Wed, Oct 7, 2015 at 8:46 PM, Tom Knox wrote: > In my humble opinion Jackson Labs continues to raise the bar in GPS

[time-nuts] Trimble Thunderbolt and David Partridge divider boardquestion

>Tom Van Baak tvb at LeapSecond.com >Mon Oct 12 11:31:17 EDT 2015 > >"For those of you who want to follow the link Chris provided >without his personal google search metadata, the correct URL is: > http://www.perdrix.co.uk/FrequencyDivider/Frequency%20Divider%202.pdf I believe that the link above

Re: [time-nuts] Trimble Thunderbolt and David Partridge divider board question

Hi The 10 MHz out of the TBolt is pretty much straight off the internal OCXO with only modest buffering. If the whole TBolt dies, you still get a clean looking 10 MHz out. Best guess is that the problem is in the divider board. That said, it’s RF overloading a system. The RF could easily be

Re: [time-nuts] Trimble Thunderbolt and David Partridge divider board question

On Mon, October 12, 2015 9:08 am, Chris Wilson wrote: > I have found when the TX is on at 136kHz the Trimble / divider > baord output goes wild and a clean square wave goes seemingly random > on my scope with noise. How are your input and output cables physically configured? I noticed on the

Re: [time-nuts] Trimble Thunderbolt and David Partridge divider board question

Hi A little quick clarification for those who don’t spend a lot of time studying PC board electro-magnetics: Reference conductor = that thing you labeled ground on the pc board. Ground = when you trip while walking the dog, it’s the thing you hit ( = earth) No that’s not the complete story,

Re: [time-nuts] UBLOX LEA-5T Programming?

kb...@n1k.org said: > A $25 Ref-0 with the same GPS and a (now) documented MCU will do the same > thing as any other GPSDO. Does anybody know if the Ref-0 expects a clean PPS from the Ref-1 OCXO, or is it happy with what comes out of a typical GPS unit? -- These are my opinions. I hate

Re: [time-nuts] UBLOX LEA-5T Programming?

Hi It’s “happy” either way (as in, it will accept the pulse). The stability will be degraded due to hanging bridges if you don’t have sawtooth correction. Bob > On Oct 12, 2015, at 6:13 PM, Hal Murray wrote: > > > kb...@n1k.org said: >> A $25 Ref-0 with the same

Re: [time-nuts] UBLOX LEA-5T Programming?

Hi, The REF-0 will accept a PPS signal from a non-timing GPS. I use the u-blox NEO-6M for a lot of my testing. That module can be had in the $12 range online. I have also gotten the REF-0 to lock to a Venus GPS and an FE-5680B rubidium standard. Of course, using a less stable PPS signal will