Hi Chris
My concern was not the magnetization of the watch movement but the induction
of eddy currents into the balance wheel which will cause drag.
The act of moving the watch into the field of the pickup could cause the
watch to start running more slowly. You will be getting a strong signal
I too tried that and equally failed even with 52dB gain. I suspect that
part of the trick is how the piezo is mounted: Quite possibly if mounted in
a circular form held only at the edges, with the watch crown touching the
centre it might be more sensitive than if the centre is clamped to the
Hi,
On 04/18/2014 03:17 PM, HagaaarTheHorrible wrote:
Hi Dave and thanks for the quick answer!
My thesis is about a phase noise measurement device I developed, which primary
use is to measure phase noise/jitter of audioband DACs. I probably won't be
focussing on jitter too much but would like
For digital clocks with analog hands, a 1sec pulse is easily detected by an
electric guitar pick-up. The pulse is the one fed to the stepping motor. I
noticed this while playing (I wear the watch on my right arm). Antonio I8IOV
Da: n1...@dartmouth.edu
Data: 19/04/2014 6.00
I have done that as
On Fri, Apr 18, 2014 at 10:37 PM, DaveH i...@blackmountainforge.com wrote:
Hi Chris
My concern was not the magnetization of the watch movement but the
induction
of eddy currents into the balance wheel which will cause drag.
The act of moving the watch into the field of the pickup could
Industry doesn't use microphones. It's piezo pickups or inductive pickups
(coils) for things like tuning fork movements in accutrons. For quartz
they use probes.
http://forums.watchuseek.com/f6/watch-timing-microphone-646148.html
On Sat, Apr 19, 2014 at 11:12 AM, Chris Albertson
I've done as much as I can do with my little Adafruit, so I guess it's time to
move to a timing receiver. I already have a UT+, so I might as well make use
of it. My thought was to use the NTP refclock driver and probably take the
sawtooth from SHMEM with a simple C program to pass to my
Hi
If you have a serial “thing” hooked to the GPS, pulling the sawtooth data out
of it is not very hard. They all have some sort of repeating message that
contains time / date / sawtooth information.
Bob
On Apr 19, 2014, at 4:58 PM, Bob Stewart b...@evoria.net wrote:
I've done as much as I
Hi Bob,
There seems to be some issue
with this UT+ that I haven't dealt with. After a cold boot it does not
like to start up the comms. There is apparently some handshake
procedure to get it all up properly, as the demo version of SynTac's
software didn't have any problem with getting it
I have a manual for the Stanford Research FS700 but it's lacking the
schematics, and so far I've been unable to find them.
I anyone has copies they'd be willing to share, or could point me in the
right direction, that would be much appreciated.
Regards
Nigel
GM8PZR
Hi Bob,
Somehow I missed that page in all the times I looked through the Oncore manuals
I have. I see various commands to tell it to change this or change that, but
no clear path on how to talk to a UT+ that is mute but not bricked. I'll go
back through the PDFs I have. Maybe I just don't
Magnus wrote:
Since you are into audio and jitter, look up Julian Dunn's papers and
AES preprints.
Specifically I would recommend you start with (in priority order):
Bruno Putzeys and Renaud de Saint Moulin
Effects of Jitter on AD/DA conversion. Specification of Clock Jitter
Performance.
Hi
There are a series of init strings you send to any of these modules to get them
into the “right” mode. There’s nothing secret about it. It’s all in the manuals
for what ever board you have. You decide what you want it to send you and then
tell it what to do.
Bob
On Apr 19, 2014, at 6:41
If you are running NTP, always you are going to need the PPS. This applies
for any GPS receiver. The data you get over the serial port is never
intended for timingIf you do not use PPS your NTP server will see the
GPS as being such a poor clock that it will likely ignore it in favor of
some
Hi
If you tell it to turn off all of the “broadcast” strings, it’s not going to be
very helpful when powered up. If the baud rate is set to something nutty,
that’s an issue as well. I normally figure out a command that is certain to
give a response and then play with baud rate settings until I
On Sat, Apr 19, 2014 at 9:18 PM, Bob Stewart b...@evoria.net wrote:
Somehow I missed that page in all the times I looked through the Oncore
manuals I have. I see various commands to tell it to change this or change
that, but no clear path on how to talk to a UT+ that is mute but not
bricked.
Thanks Paul. As I mentioned to Bob, I'll look through that. I can still
picture in my mind the code that does the startup. I just reached my
aggravation saturation point with it last summer and put in the Adafruit.
Bob
From: Paul tic-...@bodosom.net
To:
Thanks a lot for the answers!
I think I already have the G.810, will check the others too now. Also will try
to get the Dunn/Putzeys papers mentioned from the other thread.
Again thank you all very much!
Best Regards
Hag
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