[time-nuts] Re: Types of noise (was: Phase Station 53100A Questions)

2022-02-15 Thread Joseph Gwinn
On Tue, 15 Feb 2022 03:30:31 -0500, time-nuts-requ...@lists.febo.com wrote: time-nuts Digest, Vol 214, Issue 17 > Date: Mon, 14 Feb 2022 22:10:10 +0100 > From: Attila Kinali > Subject: [time-nuts] Re: Types of noise (was: Phase Station 53100A > Questions) > To: Discussion of precise time

[time-nuts] Re: Current-day GPS timing receivers

2022-02-15 Thread Poul-Henning Kamp
Greg Troxel writes: > Read this paper > > > https://hamsci.org/sites/default/files/publications/2020_TAPR_DCC/N8UR_GPS_Evaluation_August2020.pdf The "multistep" jitter seen on the PPS plots is a deliberately induced high frequency jitter. The effect is to "rough up" long hanging

[time-nuts] Re: Current-day GPS timing receivers

2022-02-15 Thread Greg Troxel
Larry Gadallah writes: > I'm thinking of reviving a long dead project to build a GPSDO. The last > time I looked, state of the art for GPS receivers was things like the > Motorola Oncore UT+ or the Trimble Resolution T. It's been 10 years (at > least). What better options, if any, are available

[time-nuts] Re: Efratom FRK with "inoperative lamp"

2022-02-15 Thread Matthias Welwarsky
On Dienstag, 15. Februar 2022 08:10:12 CET Darren Freeman wrote: > On one of my units, I had to manually run the lamp heater to a higher > than normal temperature, before it would light. (With a thermocouple, > it's best to use some heatsink grease, otherwise the readings can be a > long way off.)

[time-nuts] Re: Current-day GPS timing receivers

2022-02-15 Thread Bob kb8tq
Hi First question would be “why?” ( or more properly, what are you trying to accomplish? / what are the project goals? ) You can buy any one of a number of GPSDO’s on eBay for very little money. They come in a range of “flavors” from a range of suppliers. You can get OCXO based units. You can

[time-nuts] Re: Current-day GPS timing receivers

2022-02-15 Thread Dan Kemppainen
I'd really like to see how these perform. https://www.u-blox.com/en/product/lea-f9t-module https://www.u-blox.com/en/product/zed-f9t-module However, getting them in hand is sometimes difficult. That may be changing since the last time I've really looked... Dan On 2/15/2022 3:30 AM,