Re: [time-nuts] ZCD Article

If you don't like to click on encoded URL's or don't trust box.com, The original source of the PTTI paper: Zero-Crossing Detector with Sub-Microsecond Jitter and Crosstalk https://tycho.usno.navy.mil/ptti/1990papers/Vol%2022_20.pdf Another trusted source: Zero-Crossing Detector with

[time-nuts] ZCD Article

TNs - Bob Martin asked me to post this article reference about designing ZCD systems. https://app.box.com/s/b7d45z2cpq0x5ilz4jtn7a424btzjdhm Jim ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to

[time-nuts] A comparison of the TAPR-TICC and BG7TBL FA1

FA1 noise test was shown here: http://lists.febo.com/pipermail/time-nuts_lists.febo.com/2019-August/097445.html TAPR TICC noise test was shown here: https://www.eevblog.com/forum/metrology/comparing-the-performance-of-17-different-gpsdos/?action=dlattach;attach=591979;image Tom ran my TICC data

Re: [time-nuts] ADRAT 4110 Frequency difference multiplier

Paul, the Adret 4110 is great for frequency difference measurements and adjustments. For serious ADEV measurements, it's just too noisy on low tau's and has too much temperature drift / long term phase instability on high tau's. See the attched noise floor test. I have a 4110 with a paper op

Re: [time-nuts] ADRAT 4110 Frequency difference multiplier

As to availability the only ones II know, will ask Juerg if he knows of any others.  In a message dated 9/7/2019 8:03:07 AM Eastern Standard Time, p...@bicknells.f2s.com writes: Hi Bert Thank you for you post Looking for a service manual in PDF format for the ADRAT 4110 if you ever come

Re: [time-nuts] ADRAT 4110 Frequency difference multiplier

PaulYes ere is a 527 on ebay at one time they where more than 10K the 4110 acording to Juerg was close to 20K Franken he had one in his Lab when he worked for a living probably 20 years ago.We will look if we have somewhere some info.We use these dayle, the fastest way to do do precise high

Re: [time-nuts] ADRAT 4110 Frequency difference multiplier

Hi Bert Thank you for you post Looking for a service manual in PDF format for the ADRAT 4110 if you ever come across one Am I correct that Tracor 527 & ADRAT 4110 are the only Frequency difference units available ? PS there is one of each available on Ebay Regards Paul -Original

Re: [time-nuts] GPS Antennas

To the OP, Dan, Just curious - do you use something like this: https://endruntechnologies.com/products/antennas-accessories/lightning-arrestor Good luck with the new antenna. 73's, John AJ6BC On Sat, Sep 7, 2019 at 3:17 AM Björn wrote: > https://www.ngs.noaa.gov/ANTCAL/# > > Look at say an

Re: [time-nuts] Looking for Symmetricom system info: 105542-002A

Haven't been able to find anything so far. Can you post a hi-res pic of the front of the system please? On 7/09/19 10:17 am, Walter Shawlee 2 wrote: I recently got a rack shelf filled with Symmetricom black modules (PMM controller w/LCD display, GPS, PRS-RB Rb oscillator and PRS-XO ovenized

Re: [time-nuts] GPS Antennas

https://www.ngs.noaa.gov/ANTCAL/# Look at say an old Ashtech ASH700936D_M which you can find calibrations for both SCIS and “Snow” radomes and without radome for the same antenna. I have seen more recent radomes that are hemisphere-shaped. However these are more prone to be favored bird view

Re: [time-nuts] GPS Antennas

Run the plastic in a microwave oven, with a glass of water. Don’t use it if the plastic gets warm. /Björn Sent from my iPhone > On 6 Sep 2019, at 21:45, David G. McGaw wrote: > > Also, as I have found, some plastics don't just delay but actually > absorb the signal. > > David N1HAC > >>

Re: [time-nuts] A comparison of the TAPR-TICC and BG7TBL FA1

Hi Mark, the tests you did are between two different sources, so it is not a test that can determine the noise floor of the instruments under test. I understand that it is still a comparison on the field between the two measuring instruments, however I think it is interesting to