For a history on the color subcarrier you can try:
http://www.videointerchange.com/pal_secam_conversions.htm#3.579545 Color
Subcarrier Explained
Here in Italy, before the digital switchover, our national broadcast
company used to sync the PAL color subcarrier to a Cs reference and my
company sold
Indeed cold fusion is here again... in Italy... google Rossi-Focardi, if
interested.
Yes, I'm actually struggling finding something about this news flash...
On Thu, Feb 23, 2012 at 1:35 AM, iov...@inwind.it iov...@inwind.it wrote:
I read that the news came from sources familiar with the
Maybe I at last found something:
http://www.nature.com/news/flaws-found-in-faster-than-light-neutrino-measurement-1.10099
On Thu, Feb 23, 2012 at 1:53 AM, shali...@gmail.com wrote:
I saw this just before leaving home and I must admit I posted it before
reading it...
But by now everyone
Try this:
http://www.nature.com/news/flaws-found-in-faster-than-light-neutrino-measurement-1.10099
On Thu, Feb 23, 2012 at 2:10 AM, Magnus Danielson
mag...@rubidium.dyndns.org wrote:
On 02/22/2012 11:26 PM, Poul-Henning Kamp wrote:
In
Moreover most of actual GPS receivers are indoor capable (once got a lock
with the antenna outside). I have briefly tested the uBlox and the NavSync
for this feature and it works as expected.
On Wed, Feb 22, 2012 at 11:52 AM, pablo alvarez
pabloalvarezsanc...@gmail.com wrote:
I would not fully
Yes, the relation frequency_drift- time_error seems difficult to figure
out. I see this misunderstanding daily here at work and haven't yet found a
way to explain to my colleagues. I have already used: integral, area, count
accumulation but none worked.
On Mon, Feb 20, 2012 at 10:37 AM, Tom Van
In my opinion you don't need the power of an IDA-class disassembler to
process an 8051-like code. The MCS51 family processors have only 128 or 256
bytes of RAM (and at most 64K ROM) and cannot host complex code.
On Fri, Feb 17, 2012 at 10:27 AM, Elio Corbolante elio...@gmail.com wrote:
From:
Yes, never used but no doubt about the power of IDA. My opinion is: you
don't need the power of IDA for an MCS51 executable code.
On Fri, Feb 17, 2012 at 11:43 AM, Elio Corbolante elio...@gmail.com wrote:
Azelio Boriani wrote:
In my opinion you don't need the power of an IDA-class disassembler
be a bit more complicated
Regards,
Javier
El 17/02/2012 11:09, Azelio Boriani escribió:
In my opinion you don't need the power of an IDA-class disassembler to
process an 8051-like code. The MCS51 family processors have only 128 or
256
bytes of RAM (and at most 64K ROM) and cannot host complex
...@febo.com] On
Behalf Of Azelio Boriani
Sent: Friday, February 17, 2012 6:06 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] FE-5680A firmware dump
OK, then maybe there are ROM bank switching as the MCS51 can't execute
beyon the 64K limit. It can be very
There is no mention in the AN1002 (GPS disciplined Stratum 2 clock) of the
US patent 7,711,230 and that patent (on optical waveguides) has no mention
of temperature correction or tempco extraction...
On Thu, Feb 16, 2012 at 8:55 AM, Ulrich Bangert df...@ulrich-bangert.dewrote:
Mark,
John
-bangert.dewrote:
Nicholls et al are mentioned and they hold the patent as shown in the
attached pic...
-Ursprungliche Nachricht-
Von: time-nuts-boun...@febo.com
[mailto:time-nuts-boun...@febo.com] Im Auftrag von Azelio Boriani
Gesendet: Donnerstag, 16. Februar 2012 13:35
OK, I have the pictures of the MV201 (also the MTI Milliren 1555, the
OSA8666, the OSA8650S). They are 7M, where can I upload?
On Mon, Feb 13, 2012 at 6:47 PM, Azelio Boriani azelio.bori...@screen.itwrote:
OK, I'll take pictures of the MV201.
On Mon, Feb 13, 2012 at 6:34 PM, Scott Newell
OK, uploaded.
On Wed, Feb 15, 2012 at 6:58 PM, shali...@gmail.com wrote:
www.ko4bb.com/manuals
Click on Upload files and follow instructions
Didier KO4BB
Sent from my BlackBerry Wireless thingy while I do other things...
-Original Message-
From: Azelio Boriani azelio.bori
I have always thought the space inside the cover was the outer oven... now
I realize this is not quite correct but then the MV201, specified as a
double-oven, can't be a double-oven. The MV201 has the crystal under a sort
of Stonenge-like open structure: if this structure is the inner oven then
OK, I'll take pictures of the MV201.
On Mon, Feb 13, 2012 at 6:34 PM, Scott Newell newell+timen...@n5tnl.comwrote:
At 03:50 AM 2/13/2012, Azelio Boriani wrote:
I have always thought the space inside the cover was the outer oven... now
I realize this is not quite correct but then the MV201
Extremely delicate that fluffy contton, try not to tear apart it so that
you can place it again on top when closing the MV89. In my opinion the
internal oven is the inner one...
On Sun, Feb 12, 2012 at 3:14 AM, Scott Newell newell+timen...@n5tnl.comwrote:
As requested, pics of the inside of my
Let the TBolt do its autosurvey and see the difference... then you can
correct with a more precise set of coordinates. Or, is the autosurvey not
available in the TBolt? OK, Let me take a look at the manual...
On Sun, Feb 12, 2012 at 4:42 PM, John Ackermann N8UR j...@febo.com wrote:
When
This is the simplest part if a microprocessor can be used: by the serial
port you get the sawtooth correction in nS to be applied to the sampled
data. The sampled data must be converted to nS or the sawtooth correction
must be converted in a suitable sampled data correction. It is possible
even
My Z3815A doesn't have a leap second pending... maybe the Furuno GPS
receiver hasn't that information or the Z3815A doesn't retrive it. I'll
check the HP58503A at work.
On Sat, Feb 11, 2012 at 3:52 AM, Hal Murray hmur...@megapathdsl.net wrote:
It got here around 2785 seconds UTC after midnight
Maybe a thinner can help...
On Sat, Feb 11, 2012 at 5:58 PM, Rob Kimberley
robkimber...@btinternet.comwrote:
John,
Have you tried anything yet? As a first pass I would try something
petroleum
based to clean. I know this has worked for me in the past.
Rob Kimberley
-Original
I can confirm: my LPRO-101 has this thermal conductive green sheet too. I
think to retain it instead of getting rid but it is not in perfect shape...
On Sun, Feb 12, 2012 at 12:18 AM, Robert LaJeunesse
rlajeune...@sbcglobal.net wrote:
Try searching for thermally conductive adhesive gap filler
Don't be afraid and open up your MV89. I have done this with many MV201
without problems.
On Thu, Feb 9, 2012 at 8:25 AM, Sam li...@digitalelectric.com.au wrote:
I just powered up one of my MV89A's and measured ~7 dBm into my HP 8920B,
but as Tom has mentioned some MV89A's develop
a dry joint
AM, Azelio Boriani wrote:
Don't be afraid and open up your MV89. I have done this with many MV201
without problems.
__**_
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/**
mailman/listinfo/time
Yes, I was thinking of trying a PICTIC II partial redesign with a Xilinx
CPLD, using other type of fast turn off diodes and so on.
On Tue, Feb 7, 2012 at 8:28 AM, Attila Kinali att...@kinali.ch wrote:
On Sun, 5 Feb 2012 19:55:36 -0900 (AKST)
Richard H McCorkle mccor...@ptialaska.net wrote:
To enhance the PICTIC II performance can step recovery diodes be used?
Maybe the fast turn off can boost the switching capabilities of the
interpolator for best resolution...
On Tue, Feb 7, 2012 at 12:35 PM, Hal Murray hmur...@megapathdsl.net wrote:
att...@kinali.ch said:
BTW: does anyone
Try this for a history about the 50 OHM impedance:
http://www.rfcafe.com/references/electrical/history-of-50-ohms.htm
On Tue, Feb 7, 2012 at 10:30 PM, Attila Kinali att...@kinali.ch wrote:
On Tue, 07 Feb 2012 16:15:44 -0500
Mike Naruta AA8K a...@comcast.net wrote:
On 02/07/2012 03:59 PM,
that the
solution is good.
On Sun, Feb 5, 2012 at 1:31 PM, Magnus Danielson mag...@rubidium.dyndns.org
wrote:
On 02/02/2012 10:13 AM, Azelio Boriani wrote:
OK, got it: no need to lock the receiver clock to birds to get stable data
(e.g. Oncore+Cs) but the clock can be locked to birds to get even
Yes, DLL not DDL I made a mistake. Actually it is not in my schedule to
make such a divisor, just for speculation. The main thought here is that,
as you pointed out, it can be done avoiding PLL and DLL.
On Fri, Feb 3, 2012 at 1:49 AM, Hal Murray hmur...@megapathdsl.net wrote:
OK for the PSOC
I have implemented a digital lock detector in my CPLD timing the phase
detector itself. It was years ago... let me find the VHDL code so that can
give any idea how to implement it for a microprocessor.
On Fri, Feb 3, 2012 at 10:58 AM, Roberto Barrios rbarri...@msn.com wrote:
Long time ago I
OK, got it: no need to lock the receiver clock to birds to get stable data
(e.g. Oncore+Cs) but the clock can be locked to birds to get even better
data and obtain for free a reference clock (TBolt). The use of a stable
clock (not locked to birds) feeding the receiver can show the various
errors
Amazing... there is always something to learn from TVB. Now I'll try to
derive a 2.048MHz G.703-13 clock from a 10MHz clock. I suspect that the
procedure is similar, even if 2048KHz is not quite a power of 2.
On Thu, Feb 2, 2012 at 4:35 PM, Tom Van Baak t...@leapsecond.com wrote:
Hi Roberto,
slow to use the same trick I did on the low frequency 32 kHz.
I think you'll have to use a PLL for that one. How about a 16 kHz compare
rate: 10 MHz / 625 = 16000 Hz = 2.048 MHz / 128
/tvb
- Original Message -
From: Azelio Boriani
To: Tom Van Baak ; Discussion of precise time
Now I'm thinking that starting with a first run of 8 cycles at 500nS + 2
cycles at 400nS to be repeated for 10 times and then inserting 2 cycles of
400nS, a first approximation of my 2.048MHz can be done. Maybe with a
deltaF/F of 10 at -4 for tau 1 second but it can be done. In the very long
run
OK for the PSOC example. At the moment I can try on a Spartan3 because I
already have a board with the OCXO. The Spartan3 has the so called DCM, a
digital clock generator that can multiply an input clock using its DDL
digital delay line.
On Thu, Feb 2, 2012 at 8:13 PM, Hal Murray
No doubt, the correct way to generate accurate clocks from an accurate
10MHz is by PLLs. There are DDS too, then there is a strange method that
uses a sort of dual (triple? Quadruple? ...) modulus. The advantage is that
you don't need another oscillator (the PLL needs a VCO) or the (co)sine
lookup
Hence the need for a 100PPS from a Motorola, the 800Hz from a uBlox, the
10KHz from the Jupiter T, the 10MHz from the CW12 (the WI version, recently
developed thanks to the time-nuts list).
Anyway I still think that an analog GPSDO 1PPS based can be done. Maybe not
the best accuracy can be
Try this link www.serc.iisc.ernet.in/graduation-theses/babu_09.pdf
seems interesting
On Wed, Feb 1, 2012 at 1:44 AM, Magnus Danielson mag...@rubidium.dyndns.org
wrote:
On 01/02/12 01:29, Chris Albertson wrote:
On Mon, Jan 30, 2012 at 6:17 PM, Didier Jugesshali...@gmail.com wrote:
You have
I have opened the FTS125: the fixed OCXO 20MHz is fed using the EXT_CLK pin
7 on the CW25. Maybe it is possible to drive a CW12 with an external high
quality 20MHz but maybe a suitable firmware is then needed.
On Wed, Feb 1, 2012 at 10:28 AM, Attila Kinali att...@kinali.ch wrote:
On Tue, 31 Jan
In your opinion, is it possible for a GPS receiver to align the PPS pulse
on multiple of the C/A code repetition rate because of (for example) badly
received satellite signals? Maybe this can happen, after the initial
acquisition, on the following updates.
On Wed, Feb 1, 2012 at 10:47 AM,
Interesting: a sort of public grandmaster. I don't think there are any
available. I have attended an Oscilloquartz's live meeting on IEEE1588 and,
of course, they have shown their expensive production but, in general, it
should be useful to find public grandmasters to test with.
On Wed, Feb 1,
In my opinion the work done locking the VCTCXO of the Oncore is different
from the TBolt OCXO management: the TBolt steers the OCXO based on the
received signal instead they locked the Oncore oscillator to a Cs
reference. Yes, if all the world is the same then there is no difference:
the Cs locks
fixes/second, I am sure there are better ones yet. They cost a lot of
money.
Didier KO4BB
On Mon, Jan 30, 2012 at 4:31 AM, Azelio Boriani azelio.bori...@screen.it
wrote:
OK, now I know and wonder if other GPS receivers that have frequency
outputs behave in this manner. For example
The Navsync FTS125 is an example where the GPS receiver engine (the CW25)
is driven by a 20MHz fixed OCXO. At the moment I don't know if the CW25 of
the FTS125 has a specific firmware for that but I suspect that it must be
so. In my opinion it is best to have a tunable OCXO (like the TBolt) to
Timing GPS receivers usually have the sawtooth correction message and I saw
an application of a delay line to correct the PPS before using it. Of
course if you time the PPSes difference with a time-to-digital you don't
need to correct the incoming hardware PPS by a delay line, but to implement
an
Ah, is it a burst of 10KHz once a second? I don't have a Jupiter-T and I'm
a PPS-type discplining fan but I thought it was a continuous 10KHz.
On Mon, Jan 30, 2012 at 10:33 AM, Attila Kinali att...@kinali.ch wrote:
On Sun, 29 Jan 2012 00:50:35 -0600
Ray Xu rayxu...@gmail.com wrote:
For
phase is held until the next jerk.
Bruce
Azelio Boriani wrote:
Ah, is it a burst of 10KHz once a second? I don't have a Jupiter-T and I'm
a PPS-type discplining fan but I thought it was a continuous 10KHz.
On Mon, Jan 30, 2012 at 10:33 AM, Attila Kinaliatt...@kinali.ch wrote:
On Sun
is phase jerked every second
in the same fashion.
Bruce
Azelio Boriani wrote:
OK, now I know and wonder if other GPS receivers that have frequency
outputs behave in this manner. For example the Motorola 100PPS output,
the
uBlox 800Hz, the Navsync variable frequency output and so
I'm rather new to this list too but I'm working on precision time and
frequency since 1999. Learned more since I've joined the list than before,
especially from the practical side: various GPSDOs behaviour, GPS receivers
tips and tricks, high performance test equipment to watch for. Papers that
Interesting, I've downloaded and taken a look at the example and noted how
the Prologix doesn't use the Remote Procedure Call (RPC) method but a
simple telnet-like connection. Follow Orin's directions to convert from
WINSOCK to Linux-style socket calls. Maybe you should first take a look how
to
Wow, good work, a very fine reverse engineering attempt.
On Sun, Jan 29, 2012 at 12:45 PM, Javier Herrero jherr...@hvsistemas.eswrote:
Hello,
As it has been discussed in the past days, the architecture of the newer
FE-5680A that has been recently purchased by a lot of us does not led to a
And I think it depends on the two frequencies loaded too. The FSELECT
selects between two phase accumulator steps. Maybe the word sent to the Rb
is manipulated to obtain two symmetric values to load.
On Sat, Jan 28, 2012 at 3:21 PM, Javier Herrero jherr...@hvsistemas.eswrote:
El 27/01/2012
Yes, the first real push was the Longitude Act (1714) and the Harrison's
clocks.
On Tue, Jan 24, 2012 at 5:36 PM, Chris Albertson
albertson.ch...@gmail.comwrote:
On Tue, Jan 24, 2012 at 3:16 AM, Attila Kinali att...@kinali.ch wrote:
On Tue, 24 Jan 2012 11:04:08 +
Poul-Henning Kamp
Maybe the Longitude Act was issued also because of the disaster occured in
1707 due to a navigation error: the Royal Navy fleet lost 4 of its 15 ships.
On Tue, Jan 24, 2012 at 5:50 PM, Azelio Boriani azelio.bori...@screen.itwrote:
Yes, the first real push was the Longitude Act (1714
I've read the book by Dava Sobel Longitude... not technical but
interesting for me.
On Tue, Jan 24, 2012 at 6:05 PM, Lee Mushel herbe...@centurytel.net wrote:
If you're looking for a really interesting topic to read about, the
development of an accurate ship-board clock is really fascinating!
Serial port communication, GPIB or what else?
On Sat, Jan 21, 2012 at 3:22 PM, Timeok tim...@timeok.it wrote:
Hi all,
Do you have some experience with TimeLab connected with a TIC HP53132A?
My trouble is as follow:
using the default setup and acquiring for 1 hour, I can see on display the
Message - From: Azelio Boriani
azelio.bori...@screen.it
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Sent: Thursday, January 19, 2012 4:14 PM
Subject: Re: [time-nuts] Leap Second decision postponed
For the Motorola/iLotus receiver the command
.
On Fri, Jan 20, 2012 at 10:08 AM, Azelio Boriani
azelio.bori...@screen.itwrote:
Yes, I was too fast, looked again and found only almanac data. I'll try on
my M12.
On Fri, Jan 20, 2012 at 2:04 AM, Tom Van Baak t...@leapsecond.com wrote:
No, @@Be is just the almanac data. That is not what you
command... now I'm
collecting data and then I'll compare to the ICD.
On Fri, Jan 20, 2012 at 1:53 PM, k4...@aol.com k4...@aol.com wrote:
You will need to consult the ICD to decipher the data.
Connected by DROID on Verizon Wireless
-Original message-
From: Azelio Boriani azelio.bori
OK, thank you for your help.
On Fri, Jan 20, 2012 at 11:04 PM, Tom Van Baak t...@leapsecond.com wrote:
It's in m12-gps-bit-stream.pdf under www.leapsecond.com/pages/m12/
/tvb
- Original Message -
From: Azelio Boriani
To: Tom Van Baak ; Discussion of precise time and frequency
Yes, me too...
On Thu, Jan 19, 2012 at 11:20 PM, mike cook michael.c...@sfr.fr wrote:
Le 19/01/2012 21:55, k4...@aol.com a écrit :
Last time I checked (first of this week) subframe 4 of page 18 in the
data stream from the GPS satellites, they are not indicating there is a
pending leap
For the Motorola/iLotus receiver the command is @@Be. But the data returned
has no such page 18 of subframe 4. Manual says subframe 4 with pages 2 to
5, 7 to 10 or 25 and subframe 5 with pages from 1to 25.
On Fri, Jan 20, 2012 at 1:06 AM, k4...@aol.com k4...@aol.com wrote:
Hal,
Thanks, glad
Usually the HP5370A or B here is considered for the single shot time
interval high resolution feature. The HP5335 is 2nS compared to 20pS of the
HP5370. To that extent they are not the same.
On Wed, Jan 18, 2012 at 10:05 AM, Roy Phillips phill...@btinternet.comwrote:
Chris
The HP 5335A is also
I have the HP5384A but it is a plain counter (no time interval). Not so
suitable for a time-nut: just like having a voltmeter, useful to have it
handy to do the very first test. It has the external reference input and
the GPIB interface.
On Wed, Jan 18, 2012 at 11:45 AM, Rob Kimberley
Yes, this catched my eye too...
On Wed, Jan 18, 2012 at 1:20 PM, Attila Kinali att...@kinali.ch wrote:
On Fri, 13 Jan 2012 12:50:19 -0500
Bob Camp li...@rtty.us wrote:
The gizmo on top of the crystal is a rapid transition thermistor. The
Russians came up with them for use in OCXO's back
A good OCXO left alone. Rbs should have OCXOs inside...
On Thu, Jan 12, 2012 at 5:01 PM, John Ackermann N8UR j...@febo.com wrote:
I think you have to define better, though. A GPSDRbO will have better
holdover performance (e.g., stability when the GPS signal goes away) than
one using an OCXO,
Yes, recently I've bought a Z3815A from the usual suspects, it works, but
seems it was stocked in the moisture (under the rain?)...
On Thu, Jan 12, 2012 at 11:21 PM, Bob Camp li...@rtty.us wrote:
Hi
Neither unit is very common. In the same sort of venue, the 3801's sell for
about half of
I had a negative experience with chinese vendors too. Bought a Z3815A, yes
works, the GPS unit has heavy rust and the boards shows sign of exposure to
high humidity if not rain. Fortunately the E1938A oscillator seems clean
and works OK. From fluke I got an LPFRS very different from the pictures
:28 PM, Azelio Boriani wrote:
On the usual paybay site there are available some Z3815 with the E1938
oscillator. I have bought one and found the shielding of the Furuno GT74
GPS heavily rusted. Fortunately it is perfectly working and the seller
says
all are that way. It was the only item
Have you already this?
On the TIB (P1) DB-25 connector, I'm fairly confident about these:
V+ pins 1 and 21
V- pins 8 and 25
10MHz #1 pins 2/15 xfmr coupled, ~4.6V into 1M
10MHz #2 pins 23/16 xfmr coupled, ~4.6V into 1M
1PPS pin 14
Supply voltage is dictated by Lucent DC-DC converter. Input is
in the archives that had any significant
info on this unit. For some reason, I find that surprising.
Ed
On 1/8/2012 11:33 AM, Azelio Boriani wrote:
Have you already this?
On the TIB (P1) DB-25 connector, I'm fairly confident about these:
V+ pins 1 and 21
V- pins 8 and 25
10MHz #1
Wireless thingy while I do other things...
-Original Message-
From: Azelio Boriani azelio.bori...@screen.it
Sender: time-nuts-boun...@febo.com
Date: Sat, 7 Jan 2012 02:00:21
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Reply-To: Discussion of precise
Florida, so probably at a lower latitude than most of you,
o
e same setup farther north may not work as well.
idier KO4BB
ent from my BlackBerry Wireless thingy while I do other things...
Original Message-
om: Azelio Boriani azelio.bori...@screen.it
nder: time-nuts-boun...@febo.com
te
: Re: [time-nuts] Thunderbolt? (re simple gpsdo.) capacitors
In message
CAL8XPmO76XuTETZC=33_v2YWuJGcw8gCvtTDHyae6E4MFb18=g...@mail.gmail.com
, Azelio Boriani writes:
I have googled extensively trying to find something about the dual
capacitor method of reducing the leakage current... nothing
Amen.
On Sat, Jan 7, 2012 at 1:04 AM, Mike S mi...@flatsurface.com wrote:
On 1/6/2012 6:20 PM, iov...@inwind.it wrote:
Now I read on another list, in which the subject is not timekeeping and
from a
respectable author, that:
The GPS is very unlikely to give an accurate speed for anything
Try this: http://ke6mto.files.wordpress.com/2010/07/gps2a.pdf
but forst here: http://www.weirdstuff.com/cgi-bin/item/20164
On Sat, Jan 7, 2012 at 1:24 AM, Don Lewis dlewis6...@austin.rr.com wrote:
Can someone please give me some pointers (my first time with a GPS module).
A little
And let me say this in italian: Antonio, ma chi ha detto 'sta fesseria?
On Sat, Jan 7, 2012 at 1:24 AM, Azelio Boriani azelio.bori...@screen.itwrote:
Amen.
On Sat, Jan 7, 2012 at 1:04 AM, Mike S mi...@flatsurface.com wrote:
On 1/6/2012 6:20 PM, iov...@inwind.it wrote:
Now I read
...I cannot find that weird text using Google...
Antonio, ti ricordi il tunnel della Gelmini? Ecco e' la stessa cosa!
On Sat, Jan 7, 2012 at 1:30 AM, Azelio Boriani azelio.bori...@screen.itwrote:
And let me say this in italian: Antonio, ma chi ha detto 'sta fesseria?
On Sat, Jan 7, 2012 at 1
Absolutely yes, the antenna must see the sky, not the ceiling. Even very
sensitive GPS receivers must have a good view of the sky for the first fix,
then you can bring the antenna indoor. You can try positioning the antenna
very near a window for just a test but better a good view. The car roof is
If you use a Tektronix TDS series scope you can set the acquiring to peak
detect instead of sample to let the PPS be visible even for long timebase
run. That is: usually, with the trigger set to normal and the timebase to
100nS/div or 1uS/div you can see the PPS anyway. If you set the timebase to
Great, don't forget to specify what reference your measurements were made
from (or did I miss anything from your posts?).
We use the CW12 PPS for our GPSDOs.
On Thu, Jan 5, 2012 at 6:57 PM, Ed Palmer ed_pal...@sasktel.net wrote:
Okay, I've cooled off - a bit. The bottom line is that the 10 MHz
OK, thank you.
On Thu, Jan 5, 2012 at 8:29 PM, Ed Palmer ed_pal...@sasktel.net wrote:
Do you mean the reference oscillator for the 5372A? That was the internal
10811 OCXO. Over a 1000 sec. run, drift wouldn't have any affect on these
numbers.
Ed
On 1/5/2012 12:54 PM, Azelio Boriani
I have googled extensively trying to find something about the dual
capacitor method of reducing the leakage current... nothing found. Please,
can you indicate anything for me to learn more?
Thank you
On Thu, Jan 5, 2012 at 9:18 PM, WarrenS warrensjmail-...@yahoo.com wrote:
Yes almost as long
... don't know but judging from the very simple ASCII schematic I'll say no
because the lower capacitor is grounded. There is some sort of feedback I
can't figure out, too simple that schematic.
On Thu, Jan 5, 2012 at 11:27 PM, li...@lazygranch.com wrote:
Perhaps the dual cap is a differential
=33_v2YWuJGcw8gCvtTDHyae6E4MFb18=
g...@mail.gmail.com
, Azelio Boriani writes:
I have googled extensively trying to find something about the dual
capacitor method of reducing the leakage current... nothing found.
Please,
can you indicate anything for me to learn more?
It is very simple:
R1 charges
You are right. We use the CW12 (timing version) and it behaves as you
depicted. Of course there is also no holdover on its 10MHz output. Only the
FTS125 (and similar) have first a fixed OCXO to drive the GPS receiver and
then an OCXO to be aligned with the 10MHz to have a real 10MHz with
holdover
The output frequency is programmable: try $PRTHS,FRQD,xx.xxxcrlf where
xx.xxx is the desired(?) frequency in MHz with 3 decimal places (they say
for 10KHz set 0.010).
Maybe the slight offset is due to the NCO based on the chipping rate of
10.23MHz:
10.23MHz/2^32*4198404003 is 9.783MHz
On
, Ed Palmer ed_pal...@sasktel.net wrote:
On 1/4/2012 9:00 AM, Azelio Boriani wrote:
The output frequency is programmable: try $PRTHS,FRQD,xx.xxxcrlf
where
xx.xxx is the desired(?) frequency in MHz with 3 decimal places (they say
for 10KHz set 0.010).
Unfortunately, the frequency
Interesting...now i wonder how they can steer the frequency. Usually in C/A
GPS receivers the oscillator is not corrected and any drift is accounted
for in software: usually you see geographic coordinates out of the
receiver. In the Motorola receiver they say the PPS has the granularity of
the
You're right there are 3 phase detectors in the 4046: RS and JK flip-flops
and and XOR gate.
On Wed, Jan 4, 2012 at 6:21 PM, Chris Albertson
albertson.ch...@gmail.comwrote:
On Wed, Jan 4, 2012 at 12:58 AM, Hal Murray hmur...@megapathdsl.net
wrote:
Neat. Thanks for sharing.
With a
control circuit. If it's bad, then try
hooking it to +5V to verify the oscillator and then troubleshoot the
servo board.
Regards,
Pete
On Wed, Dec 21, 2011 at 5:00 AM, Azelio Boriani
azelio.bori...@screen.it wrote:
10MHz crystals used in OCXO are designed
Interesting... this explains why they use a 20MHz OCXO (without EFC) in the
FTS125 to clock the receiver that has an NCO steered that clocks a PLL that
synchronize another OCXO (with EFC). Yes, I have opened up an FTS125.
On Wed, Jan 4, 2012 at 8:32 PM, Ed Palmer ed_pal...@sasktel.net wrote:
On
It depends on the option ordered: the FTS125s we have are FTS125-COO
(double OCXO) the -CTV option is the TCXO/VCXO option, there is the -COV
option too.
On Wed, Jan 4, 2012 at 10:08 PM, saidj...@aol.com wrote:
Hi Ed,
sorry to hear that, contact me off-list and I will try to solve your
The OCXO used are marked OFC3DJ1AA (fixed) and OVC3CE1AA (with EFC) but no
data I have found: only OVC5 and OFC5 series.
On Wed, Jan 4, 2012 at 11:04 PM, saidj...@aol.com wrote:
yes, see that now, looks like the OCXO option about doubles the price of
the unit on Digikey..
In a message dated
Wow, have you a TSC5125A? Lucky you...
On Wed, Jan 4, 2012 at 11:12 PM, saidj...@aol.com wrote:
Hi Graham,
the TSC5125A has auto-scaled the plot to 2E-04Hz fractional frequency from
10MHz, or in other words one vertical division is 2E-011 at 10MHz, or 20
parts per trillion, or 0.0002Hz
message-
From: Azelio Boriani azelio.bori...@screen.it
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Sent: Mon, Jan 2, 2012 09:42:54 GMT+00:00
Subject: Re: [time-nuts] eBay Ublox
I have experience with the LEA5-T in timing mode and, and of course, it
works
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Azelio Boriani
Sent: Tuesday, January 03, 2012 5:13 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] eBay Ublox
Yes, no TRAIM on the uBlox but I
Yes, found others but, for example, we use the 131-40 and have the
datasheet: can't find it from those URLs. You can find 131-42 131-45 and
131-1000, 1001, 1002 and so on. Our 131-40 was not made for us but decided
to use it with the permission of the original customer to increase the
order
I have experience with the LEA5-T in timing mode and, and of course, it
works as expected. You can set not only how many samples to take but also
the variance to achieve before starting the position-hold/timing mode.
On Sun, Jan 1, 2012 at 10:44 PM, Bob Camp li...@rtty.us wrote:
Hi
I haven't
On the usual paybay site there are available some Z3815 with the E1938
oscillator. I have bought one and found the shielding of the Furuno GT74
GPS heavily rusted. Fortunately it is perfectly working and the seller says
all are that way. It was the only item found with that type of OCXO.
On Mon,
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