In message 201011090430.oa94up7y046...@stenn.ntp.org, Harlan Stenn writes:
Using USB serial introduces amusing amounts of jitter. This is usually
not a problem for the NMEA sentences, but I wouldn't want to be
detecting the PPS signal via USB1 or USB2 serial devices.
I've heard that USB3 should
It's not exactly a USB dongle, but if you have a Thunderbolt, Lady Heather
has a time sync command that sets the system clock to Tbolt time. You can have
it set the clock periodically or whenever the system clock diverges from Tbolt
time by a specified amount (including 0 milliseconds).
Hi
Depends on where you filter it. If you get a oscillator going that also mixes,
the frequency difference will come out directly. Getting that all done at once
may be a bit tricky.
Bob
On Nov 9, 2010, at 1:55 AM, Magnus Danielson wrote:
On 11/09/2010 12:51 AM, Bob Camp wrote:
Hi
You
Paul,
I have a 2201 (and a 2200) and some documentation for the 2201A
including something labeled as a maintenance manual for the 2201A.
I took a very quick pass through this looking for references to
internal 1 PPS, but did not see anything too obviously relevant.
Perhaps we can discus
Sent a post yesterday and did not see it show up.
Suspect the internet gods have eaten it.
I have a Austron 2201a and have home brewed the magic down converter. It is
receiving the satellites now.
Since I have no documentation at all I am guessing at what the error is that
I am seeing. No
My guess is that the error is real and coming from the TS2100. The
TS2100 was (is) a SNTP server running a RTOS but the timestamps are done
at the application layer. If you look at the output 1pps of the TS2100,
my guess is that it will probably agree with your other devices within a
few
Since I either owned or created all the Bancomm/Datum ntp designs after
I joined bancomm in 1992, I can promise you that I still have at least
one version of the source code :-) Actually I think I even have the
source for the bc635/700LAN product, created by Joe Fontes. The problem
is generally
On 11/09/2010 03:07 AM, Hal Murray wrote:
The Garmin USB 18 was much better. Unfortunately, it wasn't as sensitive as
competing units and it's been replaced by the 18x which has the typical
horrible jitter problems. I don't have a graph of the 18x handy, but here is
data from a USB 18.
