Re: [time-nuts] WWVB SDR discussion

I have one of these wall clocks and it too has a minor misalignment of the second hand. The second hand will overshoot the face marker by about one-fourth of the distance between successive markings. If the fix is not too terribly involved I might would give it a try, otherwise, It will just have

Re: [time-nuts] UBlox F9T and Lady Heather

I too posted a similar issue with my F9P on the EEVBlog with the exact same results as you are having. I still don't have an answer for the satellites not showing up in LH. -Original Message- From: time-nuts On Behalf Of Ben Hall Sent: Thursday, May 28, 2020 16:01 To:

Re: [time-nuts] GPS antenna splitter recommendation?

. https://www.instockwireless.com/gps-splitter-4way-SMA-gps410.htm Chris Burford -Original Message- From: time-nuts On Behalf Of Frank O'Donnell Sent: Wednesday, April 29, 2020 19:18 To: time-nuts@lists.febo.com Subject: [time-nuts] GPS antenna splitter recommendation? I'm looking

[time-nuts] TimeLab / TICC

Hello All. I'm looking for some offline assistance with the TAPR TICC and TimeLab for making some measurements. My repository of notes on prior attempts vanished in a hard drive failure. I can provide clearly labeled wiring diagrams for the TICC and DUT if needed. Thanks, Chris

Re: [time-nuts] Vaperware Parts and pulse stretching circuits

Here's a good follow along for close pitch soldering: https://www.youtube.com/watch?v=5uiroWBkdFY Haven't had to solder anything this close pitch but the video is just one in a series of good soldering techniques. Chris -Original Message- From: time-nuts On Behalf Of Hal Murray Sent:

Re: [time-nuts] Using speaker / earphone for PPS testing (not a question)

I reached out to SRS several months ago to inquire if the pulse width could be configured from the default of 10 micro second. Their responses was no. Chris -Original Message- From: time-nuts On Behalf Of Taka Kamiya via time-nuts Sent: Monday, April 20, 2020 22:35 To: Discussion of

Re: [time-nuts] GPS module recommendation for Pi timing

A nice post processing application such as RTKLIB will show any cycle slips that your receiver might have encountered. A good write up about cycle slips is available here: https://rtklibexplorer.wordpress.com/2016/05/08/raw-data-collection-cycle-slips/

Re: [time-nuts] PRS10

Hi Christoph, You might would want to try and calibrate the (T)ime (O)ffset as per page 32 of the Operation and Service Manual and then write that value with the TO! command. This may or may not clear out any residual issues. Regards, Chris On 02/10/20 03:10:37, Christoph Guenther via

Re: [time-nuts] NTP apps on Windows question

Yes, You want to disable Windows Time service (w32time) if running the client from Meinberg. If you scroll down about 1/3 from the top of this document you will see where it makes mention to disable win32time. Chris On 09/24/19 14:08:12, Chris

Re: [time-nuts] Most popular NMEA sentence with date and time?

You can get date (UTC) and time (UTC) from a ZDA string. https://www.trimble.com/oem_receiverhelp/v4.44/en/NMEA-0183messages_ZDA.html On 07/22/19 12:33:48, David Van Horn via time-nuts wrote: I'm helping a friend with a hobby project, a "Countdown To Christmas" clock. I haven't looked at the

[time-nuts] PRS10 calibration

I have been digging through the TN archives and came across a post dated May 2, 2012 having to do with the calibration of the PRS10 RFS. In reading this it appears to be a process of stepping through the various time constant (PT) values during the discipline process and monitoring the time

[time-nuts] Galileo Service Outage Update

Here is an update from EGSA on the continued outage of navigation and timing services for the Galileo constellation: https://www.gsc-europa.eu/news/update-on-the-availability-of-some-galileo-initial-services As of now the service outage is at T+ 105.5 hours.

Re: [time-nuts] Thunderbolt E

From: Chris Burford To: Time Nuts Listings Subject: [time-nuts] Thunderbolt E Message-ID: <9165f782-88f7-d015-6a82-6102a4258...@austin.rr.com> Content-Type: text/plain; charset=utf-8; format=flowed I'm on the fence on purchasing a new Thunderbolt E from Trimble and wanted to hear from curr

[time-nuts] Thunderbolt E

I'm on the fence on purchasing a new Thunderbolt E from Trimble and wanted to hear from current or past owners. I have a couple of the eBay x-telecom patchwork quilt GPSDO units which seem to do an OK job. Is there anything else besides a warranty and better performance specs that the

[time-nuts] Data collection sample interval and duration

I have been collecting data previously at a one second interval for a duration of 24 hours for my RFS. What are the potential "gotchas", if any, for a .1 second interval for say 6 hours? Will going to a shorter sample interval skew the results I have been seeing previously with the one second

Re: [time-nuts] TimeLab phase difference (slope sec/sec)

Hello David, It could quite possibly be tempco induced. I have this on my schedule of future events for additional analysis. Thanks, Chris Chris, Just looking at the graph reminds me of a daily variation - perhaps due to temperature.  Is that likely?  Would a two-day graph be worth

Re: [time-nuts] TimeLab phase difference (slope sec/sec)

precise when measuring in time interval mode. Chris On 07/03/19 04:01:38, Dana Whitlow wrote: Chris, Ok, one source is a PRS-10. Is it the DUT or the reference? And if it's the DUT, what is the reference source? Dana On Tue, Jul 2, 2019 at 8:00 PM Chris Burford wrote: Hi Bob, I'm seeing

Re: [time-nuts] TimeLab phase difference (slope sec/sec)

are off by 1 ppm (or 1x10^-6). If you see 1 us of change in 1,000 seconds you are off by 1 ppb (or 1x10^-9). At a bit over 10 days (1,000,000 seconds) your 1 us change is 1 ppt (or 1x10^-12). Bob On Jul 2, 2019, at 10:17 AM, Chris Burford wrote: Is the slope value for the phase difference

[time-nuts] TimeLab phase difference (slope sec/sec)

Is the slope value for the phase difference shown in TimeLab an average of the overall data sample duration? The reason I ask is that my service manual for my RFS says: /"//A faster way to make the comparison between the reference frequency and the DUT is to use the time interval measurement

[time-nuts] 8663 Oscillator Tuning

I have an Oscilloquartz 8663-XS DOCXO in a generic eBay GPSDO. I would like to fine tune the output to get it a little closer to MHz. At current it appears to be running at 9.93x10^-13 at t1000. I'm clocking it against a PRS10C RFS using a TICC and TimeLab. Specifically I'm looking for the

[time-nuts] PRS10 tuning

I came across an older Time Nuts post that talked to setting the time constant (PT) values on the PRS10 RFS. It read as follows ... "Calibrate the Time offset (TO) according to the example on page 32 in themanual, by looping the 1pps_out to 1pps_in on the PRS10, keep in mind thatyou should use the

[time-nuts] Stable32 tau

I'm not sure if this post would be of sufficient SNR value to approve for comment. Perhaps you may have a quick and easy answer. I'm using Stable32 to print ADEV, MDEV plots and I would like to have the tau values listed as 1, 10, 100, 1000 ... Stable32 currently denotes these values in

[time-nuts] ublox M8T receiver

I have a ublox NEO-M8T receiver and would like to know if it could be utilized to steer an RFS for corrections / calibration. It is a standalone receiver unit and not a GPSDO component. The receiver is featured here: https://www.csgshop.com/product.php?id_product=249 Thank you for any

Re: [time-nuts] multimeter

I use both the Fluke 87V and Keysight 34465A at my bench. Both will handle anything I need them to. Jim Palfreyman wrote: > Hi all, > > I think I'm in the market for a new digital multimeter. > > Could I have some recommendations? > > Jim >

[time-nuts] ZED F9T first look

For those that are interested in the soon to be released ZED-F9T receiver here is a quick write up on the RTLExplorer blog: https://rtklibexplorer.wordpress.com/ ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to

Re: [time-nuts] Rooftop antenna and splitter

For a 30-35 outdoor cable run go with as big a coax as you can afford. At these frequencies attenuation becomes even more critical than say an HF application. There are several online attenuation calculators for various cable configurations that you might want to play around with:

Re: [time-nuts] Ublox F9P multi-band GPS receiver

Another aspect of this is what do you consider "good enough"? I've used my Neo-M8T-0 receiver for a positional fix down to about 4cm with the use of a CORS facility at 5.6km distance. The F9x series would probably narrow this range considerably, but again, what is good enough? It will be

Re: [time-nuts] Calculating time of lunar eclipse

Mr. Eclipse, hosted by Fred Espenak, is your go-to page for this. The data for both solar and lunar eclipse events seems to be accurate based on my experience of past events. http://www.eclipsewise.com/lunar/LEprime/2001-2100/LE2019Jan21Tprime.html Mark Sims wrote: > While on the

[time-nuts] TAPR TICC (Mode - Time Interval) Help

Hello All, I'm looking for some assistance, off list, in getting the TICC in Time Interval mode to output data in TimeLab 1.31 (Beta). I've been successful in the Timestamp and Period modes in collecting data and generating ADEV, MDEV plots etc. Please feel free to contact me for additional

Re: [time-nuts] Short term 10MHz source

I'll give the window placement a try and see if I can maintain a usable lock. Thanks for the assistance. Chris Hal Murray wrote: > > > I do realise that the long term stability of the GPSDO is somewhat superior > > to a Rubidium source. I'm planning on using my TICC to validate both my

[time-nuts] Short term 10MHz source

I have a situation in which I have access to a GPSDO 10MHz source but for only about 10-12 hours at a time. My current residence does not allow a permanent GPS antenna therefore I am limited in its use. I do realise that the long term stability of the GPSDO is somewhat superior to a Rubidium

Re: [time-nuts] PRS10 MDEV

I suspect now after your review that the effect is thermally drive, specifically my HVAC. My PRS10 is in a free air environment suspect to the wall thermostat. I'm sure I could parallel the RFS measurements with Lady Heather and find a correlation between RFS case temp and the MDEV. Thanks Tom for

[time-nuts] TAPR TICC (Cable run time delay)

Hello All, I've just received my new TAPR TICC and have been performing some initial dry runs against my PRS10. I have to ask about cable(s) delay and and what is essentially best practice for the TICC configuration. Is it commonplace to add both cables (10MHz source and 1PPS) or just the length

Re: [time-nuts] Oscilloscope-based measurements of frequency stability

This sounds interesting enough and I would appreciate any notes or insight on doing this. I have a PRS10 and several GPSDOs that I would like to evaluate for performance on my scope. Many thanks. Dana Whitlow wrote: > I cheered when I saw Dave B's "silly question", for > then I

[time-nuts] 1PPS for the beginner

look forward to anyone who cares to share their comments. Thanks for assistance. Chris Burford ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow