On a later version, the Trimble/Nortel 45k, there are a few obvious HW
differences (lousy Rx, bigger FPGA - XC5204, second Flash EEPROM).
The PWM is generated differentially (better CMR) in the FPGA (output on
pins 12, 13) registered, synchronously with the squared OCXO output
signal to reduce
I may have posted this link before. It is on topic, even though I was using
coax cable:
http://ko4bb.com/Test_Equipment/CoaxCableMatching.php
It would be easy to do the same experiment with cat-5 cable. I would expect the
pictures to look somewhat similar.
Didier KO4BB
Tom Van Baak
05/01/2014 10:57
I see occasional references to Trimble Studio here. What is it
please? An alternative to Lady Heather for Thunderbolts, or have I
missed the plot entirely? Thanks.
--
Best Regards,
Chris Wilson.
mailto: ch...@chriswilson.tv
On Sun, Jan 5, 2014 at 4:58 AM, Chris Wilson ch...@chriswilson.tv wrote:
05/01/2014 10:57
I see occasional references to Trimble Studio here. What is it
please? An alternative to Lady Heather for Thunderbolts, or have I
missed the plot entirely? Thanks.
I just picked up a copy based on
Hi Chris,
I see occasional references to Trimble Studio here.
What is it please?
For a list of features, see:
http://www.wavedigm.com/xe/studio
That page also has a Users Guide and the application itself.
regards Zim
___
I found it here and the FTDI USB serial bus driver and the manuals.
http://www.sectron.eu/products/3-results-of-finding/1558-trimble-gps-studio-for-download.html
I haven't tried it yet.
Dave
- Original Message -
From: Graeme Zimmer
To: Chris Wilson ; Discussion of precise time
I found it here and the FTDI USB serial bus driver and the manuals.
http://www.sectron.eu/products/3-results-of-finding/1558-trimble-gps-studio-for-download.html
I haven't tried it yet.
Dave
05/01/2014 16:21
Thanks Graeme, Bryan and Dave, I have it downloaded, will have a play
with it
Hi,
Wow, those recordings are very interesting! Late in that series, there's
one which sounds like a direct feed of WWVH for a few minutes. This
really points out what all is lost by the time the signal gets to air.
The phone services aren't much better, since everything above 4KHZ is
lost,
Replicating the WWV/WWVB audio is impractical given the various
weather and other timely messages.
One could use the Linux festival voice syntheses package, which gives
a choice of voices.
On 01/05/2014 07:50 AM, Jayson Smith wrote:
Hi,
Wow, those recordings are very interesting! Late in
Corby, my 5065A has s/n 2816A01605
John W Cress K0GCJ
-- Original Message --
From: cdel...@juno.com
To: time-nuts@febo.com
Subject: [time-nuts] HP 5065A serial number list
Date: Tue, 31 Dec 2013 10:57:33 -0800
As promised here is a list of all the HP 5065A
units I have come
This is by design
The POTS (Plain Old Telephone System) specifies a bandwidth of 300Hz to
3,400Hz.
http://en.wikipedia.org/wiki/Plain_old_telephone_service
They are trying to cram as many channels into as little bandwidth as
possible and the greater the frequency response they provide, the
The US POTS is digitized at 8KHz sample rate, so Nyquist says the highest
frequency you can accurately digitize is 4KHz. Allow some for a (fancy digital)
filter and 3400Hz is about the best you can expect. As for T1, almost right.
The 8K samples per second are u-law processed to 8 bits each for
DERP -- you are right. T1 does 24 voice channels, not 16.
Thanks for the heads up!
Dave
-Original Message-
From: time-nuts-boun...@febo.com
[mailto:time-nuts-boun...@febo.com] On Behalf Of Robert LaJeunesse
Sent: Sunday, January 05, 2014 11:33
To: Discussion of precise time and
att...@kinali.ch said:
Also keep in mind that RS-232 relies on the voltage going negative to encode
a 1. I.e. getting 0V is not enough and might only work by chance with some
RS-232 receivers.
I think there are 2 parts to this discussion. What do the specs say, and
what actually happens in
Hello All,
I was looking at the archives - what was the outcome of this:
Thanks to everyone for their advice. I bought a CoolRunner II
development board (only $39!) and will let you know how it goes.
Matt
On Wed, Feb 3, 2010 at 10:59 AM, Matt Ettus boyscout at gmail.com
I was looking at the archives - what was the outcome of this:
What level of nuttiness are you interested in?
CPLDs or FPGAs are neat because you can toss all sorts of stuff into them.
If you do that, you introduce opportunities for power supply level noise
coupling.
If you have something
I am working on a PLL design that uses the Lattice MX02-256 for the
dividers and XOR phase detector. I have not made any measurements on it
yet but will report back when it happens.
On 1/5/2014 7:37 PM, Hal Murray wrote:
I was looking at the archives - what was the outcome of this:
What
Hello Tom,
Thanks for replying. I will be interested to see what you end up with for
jitter, phase noise, and propagation delay; to name a few. Looks like an
interesting part from the datasheet.
Thanks,
John W.
On Sun, Jan 5, 2014 at 8:29 PM, Tom Minnis tom_min...@att.net wrote:
I am
John,
I have tried to incorporate the digital dividers of a linear phase
comparator into a CPLD. While it worked in principle as planned I had lots
of problems when the slopes of the input signals came close to each other,
this being due to
CPLDs or FPGAs are neat because you can toss all
Hello All,
I thought this may be of interest to the group - a start-up company - Sand9
- has developed a temperature controlled MEMS oscillator (TCMO):
http://www.sand9.com/product/tcmo/ .
Best Regards,
John Westmoreland
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