Empathy List Archives

AK

Attila Kinali

Tue, Jan 23, 2018 11:07 PM

On Tue, 23 Jan 2018 13:33:08 -0500
ewkehren via time-nuts time-nuts@febo.com wrote:

The cheapest is not a 5T there are many 6 and 7 for $ 10. T gives you
nothing unless you have saw tooth correction

It also gives additional performance when your skyview is very bad.
If you see only a small portion of the sky and only have 1-2 satellites
most of the time, then the position hold mode is the difference between

1µs jitter and <100ns jitter, as Said Jackson noted a few years ago.

		Attila Kinali

--
<JaberWorky> The bad part of Zurich is where the degenerates
throw DARK chocolate at you.

On Tue, 23 Jan 2018 13:33:08 -0500 ewkehren via time-nuts <time-nuts@febo.com> wrote: > The cheapest is not a 5T there are many 6 and 7 for $ 10. T gives you > nothing unless you have saw tooth correction It also gives additional performance when your skyview is very bad. If you see only a small portion of the sky and only have 1-2 satellites most of the time, then the position hold mode is the difference between >1µs jitter and <100ns jitter, as Said Jackson noted a few years ago. Attila Kinali -- <JaberWorky> The bad part of Zurich is where the degenerates throw DARK chocolate at you.

UR

Ulrich Rohde

Tue, Jan 23, 2018 11:21 PM

Who has a 10 and 30 and 100 MHz phase noise plot from 1 Hz to 1 MHz ? Thanks, Ulrich N1UL

MG

Mark Goldberg

Tue, Jan 23, 2018 11:48 PM

I do not have great equipment to do the measurement but it is at least this
good at 10 MHz as measured on one of my 8642As. I can't measure phase noise
at 30 or 100 MHz.

Offset (Hz) 10 20 50 100 200 500 1,000 2,000 5,000 10,000 20,000 50,000
100,000 1,000,000
Phase Noise (dBc/Hz) -96.9 -103.0 -106.9 -109.7 -117.7 -128.4 -136.4 -140.1
-143.1 -144.9 -145.6 -145.7 -146.2 -146.6
73,

Mark
W7MLG

On Tue, Jan 23, 2018 at 4:21 PM, Ulrich Rohde via time-nuts <
time-nuts@febo.com> wrote:

Who has a 10 and 30 and 100 MHz phase noise plot from 1 Hz to 1 MHz ?
Thanks, Ulrich N1UL

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I do not have great equipment to do the measurement but it is at least this good at 10 MHz as measured on one of my 8642As. I can't measure phase noise at 30 or 100 MHz. Offset (Hz) 10 20 50 100 200 500 1,000 2,000 5,000 10,000 20,000 50,000 100,000 1,000,000 Phase Noise (dBc/Hz) -96.9 -103.0 -106.9 -109.7 -117.7 -128.4 -136.4 -140.1 -143.1 -144.9 -145.6 -145.7 -146.2 -146.6 73, Mark W7MLG On Tue, Jan 23, 2018 at 4:21 PM, Ulrich Rohde via time-nuts < time-nuts@febo.com> wrote: > > Who has a 10 and 30 and 100 MHz phase noise plot from 1 Hz to 1 MHz ? > Thanks, Ulrich N1UL > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/ > mailman/listinfo/time-nuts > and follow the instructions there. >

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Re: [time-nuts] Suggestion for a timing GPS receiver (Trimble / Ublox /other?)