Re: [time-nuts] Lucent GPSDO comments

2014-11-14 Thread paul swed
gt; > Anthony > > > -Original Message- > From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of paul swed > Sent: Friday, November 14, 2014 8:18 AM > To: Discussion of precise time and frequency measurement > Subject: Re: [time-nuts] Lucent GPSDO comments

Re: [time-nuts] Lucent GPSDO comments

2014-11-14 Thread Anthony Roby
dvice on what I should be looking for would be helpful. Anthony -Original Message- From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of paul swed Sent: Friday, November 14, 2014 8:18 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Luce

Re: [time-nuts] Lucent GPSDO comments

2014-11-14 Thread Bob Camp
Hi The people selling them do indeed stand behind the product. My only concern is making sure there really is a problem before something gets swapped out. The best thing (by far) is to get a second unit and compare their outputs. Bob > On Nov 14, 2014, at 9:17 AM, paul swed wrote: > > Than

Re: [time-nuts] Lucent GPSDO comments

2014-11-14 Thread paul swed
Thanks everyone. My concern is did I need to reach out and get an exchange before the 30 days is up. I sense ASI the vendor is actually a pretty good company and will do the right thing. Regards Paul WB8TSL On Fri, Nov 14, 2014 at 7:35 AM, Bob Camp wrote: > Hi > > > That OCXO is doing very well.

Re: [time-nuts] Lucent GPSDO comments

2014-11-14 Thread Bob Camp
Hi That OCXO is doing very well. If you look at the plot, it’s doing a few LSB’s on the DAC over the time period. That’s good performance. Bob > On Nov 13, 2014, at 9:17 PM, paul swed wrote: > > Bob the actual pictures and files are large so here is the left screen and > right screen from

Re: [time-nuts] Lucent GPSDO comments

2014-11-13 Thread Charles Steinmetz
Paul wrote: Lots of noise on the ti/pps and you can see EFC is rising all the time. I will say in the past it had been a steady rise now there is a wave that might mean its slowing down a bit. But this all looks rattier then I would believe. According to the plot, the oscillator is still a

Re: [time-nuts] Lucent GPSDO comments

2014-11-13 Thread paul swed
Bob the actual pictures and files are large so here is the left screen and right screen from the z3811 program. Pretty easy to guess whats in the middle. Lots of noise on the ti/pps and you can see EFC is rising all the time. I will say in the past it had been a steady rise now there is a wave that

Re: [time-nuts] Lucent GPSDO comments

2014-11-13 Thread Bob Camp
Hi How much is your unit moving? Bob > On Nov 13, 2014, at 1:50 PM, paul swed wrote: > > On the older units that used a RB to control an Xtal. They created a mix of > 5 Mhz +10 Mhz and that produced 15 out that hit an amplifier to drive a 12 > way splitter. > I think I reverse engineered the c

Re: [time-nuts] Lucent GPSDO comments

2014-11-13 Thread paul swed
On the older units that used a RB to control an Xtal. They created a mix of 5 Mhz +10 Mhz and that produced 15 out that hit an amplifier to drive a 12 way splitter. I think I reverse engineered the circuit. Its on paper and filed. Oh that ends this discussion. Anyhow it was not hard to figure out.

Re: [time-nuts] Lucent GPSDO comments

2014-11-12 Thread Bob Camp
Hi The chain in the Z3810 / 3811 / 3812 Lucent boxes is *much* different than the setup in the earlier parts. The phase noise and ADEV on the Z3810’s is better than what you got on the earlier versions. That makes keeping the noise down in whatever mod you do more important. The existing 10 MHz

[time-nuts] Lucent GPSDO comments

2014-11-12 Thread Perry Sandeen via time-nuts
Wrote: At some point we will get into hacking the main board to switch from 15 MHz to 10 MHz. One doesn’t have to that if one uses the two IC divide by 1.5 circuit I offered the list. I specifically found it so I didn’t have to hack the innards. Wrote: The great news is the oscillator is 5 Mhz