[time-nuts] Silicom PCIe timestamping network cards

Hey all, I'm curious if anyone here knows much about these silicom timestamping network interfaces? They pop up fairly often for sale, usually for not that much. They have SMA in/out for a PPS signal in addition to the network interfaces. I've found datasheets like this (linked below), but no ma

[time-nuts] Looking for an SMA GPS signal splitter

Hello everyone, I'm looking for another GPS signal splitter. My plan was to get a "generic" SMA splitter/combiner and a handful of SMA DC blocking adapters, but they are considerably more expensive than I had expected - and they all seem to be in China. If anyone (in the US) has an extra 4 or 6-

[time-nuts] Re: Question about GPS 1PPS ADEV

I have yet to find a reliable source for this, but something I have heard in the past is that since the different constellations' satellites may be controlled and disciplined differently (and to different standards), it is not wise to use more than one constellation on receiver that is used to

[time-nuts] Re: Ublox LEA-4T mentioned here. Have fired one up

holds > down I assume a small regulator and TCXO. But it really doesn't seem to do > anything. Four of my units do not have that mod. So have not really figured > it out yet. > Good luck. > Paul > > On Wed, Apr 6, 2022 at 12:51 PM John Miller via time-nuts < > time-nut

[time-nuts] Re: Ublox LEA-4T mentioned here. Have fired one up

Hi Paul, Thanks for sharing this info! I ordered one of these lots as well, and it should arrive today, actually. My intention is to re-mount the modules on more sensible breakout boards, maybe a Pi Hat. The 8 pin chip on the board is an MCL BP2G. RF power combiner/splitter https://www.minicir

[time-nuts] Help needed IDing GPS antenna

Hey all, I'm looking for a specs sheet for an antenna i recently got my hands on. It's marked Topcon on the top, II Morrow Inc model 590-1114 on the bottom. I've tried searching in all the usual places but haven't found anything yet. If anyone could send anything my way that would be much apprec

[time-nuts] Re: Raspberry Pi with TimeHat thinks it's 2002!

Hi Robert! You almost certainly are still running the older version of GPSD which has this exact issue. You can manually update GPSD, but the quickest fix for this is to flash a newer version of the TimeHat image to your SD card. You can download that image here: https://millerjs.org/files/TimeH

[time-nuts] Re: Clock display on Linux systems?

This is something I have explored from time to time in order to find a good local display option for Pis running as GIS-disciplined NTP servers. I've done a lot of exploring and fiddling around with different options but have yet to find a solution that I am fond of, for the reasons that you descr

[time-nuts] Re: Updated TimeHat image (new gpsd!)

I can follow the info below > (It is more curiosity… I have 2 timeHats, and can do them one at a time) > > Thanks and 73, > Scott W7SLS > > Sent from my iPad > >> On Oct 22, 2021, at 6:12 PM, John Miller via time-nuts >> mailto:time-nuts@lists.febo.com>>

[time-nuts] Updated TimeHat image (new gpsd!)

Hello all, Here’s an updated system image for the TimeHat - including the latest versions of gpsd, chrony, and DietPi. I had been meaning to get this image out sooner, but things have been pretty busy lately between work and family. https://millerjs.org/files/TimeHat32_20211022.img.xz

[time-nuts] Re: TimeHat

as what the TimeHat memory card is doing, but if I go into the > menu on the monitor there is a difference. > > Robert > > > On 07/05/2021 07:04 AM, John Miller via time-nuts wrote: >> Robert, >> If an HDMI display is connected when the board is booted, video sh

[time-nuts] Re: TimeHat

Robert, If an HDMI display is connected when the board is booted, video should be displayed. If no display is connected when the system is booted, the HDMI port is not activated, and you cannot attach a monitor to it after the fact. If this is something you and others would like to do, I can wor

[time-nuts] Re: GPS antenna distribution???

I have a couple of these and they work wonderfully well: https://timemachinescorp.com/product/4-way-gps-splitter/ They also have an option that you can power with an external supply, which is a nice feature if you need it. John Original Message Subject: [time-nuts] Re: GPS an

[time-nuts] Re: Looking for gerber files for a timing GPS board

or; it's the opposite of the RCB in that it makes *everything* accessible. > I'll try to get the design files on my github (github.orb/n8ur) later today. > > Note that the ZED-F9 chips have multiple ground pads under the chip and can't > be hand soldered; you'd need to

[time-nuts] Looking for gerber files for a timing GPS board

Hello Everyone! I am interested in designing a Pi hat PCB to be compatible with a timing GPS PCB design that I have seen used in a number of places. I have found an “okay” digram, but if anyone has already made gerbers for this thing, I would greatly appreciate it. - Diagram: https://files.mill

[time-nuts] GPS-TMG-RCVR232 Update!

Hello Everyone, The GPS-TMG-RCVR232 came in today, and I’ve been spending the past couple of hours working on understanding it. Pictures here: https://photos.millerjs.org/?f=GPS-TMG-RCVR232 This thing is very nicely designed. With the plastic do

[time-nuts] Re: PCTEL Timing Antenna with integrated GPS Receiver?

p58534a/ > > /tvb > > > On 5/8/2021 6:36 PM, John Miller via time-nuts wrote: >> I did mean this unit in particular, specifically I’m really interesting in >> turning up the pinout for that connector. I have at least been able to find >> a mating end for

[time-nuts] Re: PCTEL Timing Antenna with integrated GPS Receiver?

I take everything apart, so that much is a given - I just also like to have as much original documentation as I can, especially if there are any special initialization or configuration commands. Whatever I find I will document for anyone else who gets one of these in the future. Generally speaki

[time-nuts] Re: PCTEL Timing Antenna with integrated GPS Receiver?

I did mean this unit in particular, specifically I’m really interesting in turning up the pinout for that connector. I have at least been able to find a mating end for it. My past hour of furious googling has turned up surprisingly little about this model. I am very interested in how it performs

[time-nuts] PCTEL Timing Antenna with integrated GPS Receiver?

Hello All, I was browsing around looking at surplussed reference antennas, like you do, and I stumbled across something really interesting and impulse bought it because it was cheap enough. It’s a PCTEL GPS-TMG-RCVR232-NLM - the 232 in the model name may catch your eye. Before reading the model

[time-nuts] 2nd Run of TimeHats

Hello everyone, I’ve seen a number of messages lately that reference the TimeHat boards I put together a couple of months ago, with lots of positive feedback, which I really appreciate. The first run of boards I did sold fairly quickly, and based on a number of emails I have gotten lately there

Re: [time-nuts] Ebay Huawei Ublox M8T Modules Warning

Hey Bob, (and whoever else has got one of these things) I'm curious as to what degree of progress has been made using these little modules as-is. I know some people are pulling the M8T modules off to upgrade other systems but I want to try and use it as it was designed, as much as I can anyway.

[time-nuts] Looking for help recovering a Spectracom 9383

Hello Everyone! TL;DR: If anyone with a Spectracom 9383 would be willing to help me recover mine, I would be eternally grateful! Early last year I stumbled upon a local Spectracom NetClock 9383 for a very reasonable price. It worked just fine out of the gate, but because I am incapable of le

[time-nuts] TimeHat setup & walkthrough video

Hello again everyone! I wanted to send out another message regarding the TimeHat to let you all know that I made a short video that includes some more information about it, including what all you get and how to set it up and use it. Even if you don’t get one of these modules from me it may help

[time-nuts] TimeHat - GNSS and RTC module for Raspberry Pi time servers

Hello everyone! I’m a long time reader, first time writer. Huge fan of the repository of knowledge that you all have created. I hope its okay to share things like this here, if not - admins please remove it. Like many of you here I have been using Raspberry Pis as GNSS-disciplined network time