, 2012 at 9:47 PM, Pieter-Tjerk de Boer ptdeb...@cs.utwente.nl
wrote:
On Sun, Jan 01, 2012 at 11:55:26PM +0100, Azelio Boriani wrote:
Pieter, please, would you be so kind as to share, for example, the last
60
seconds file?
At present I only have it in a rather unwieldy form (namely
Yes, seems difficult to find the differences but I've found at least the
131-2: http://w9fz.com/ham/OCXO131-2Spec.pdf
On Tue, Jan 3, 2012 at 12:12 AM, Chris Albertson
albertson.ch...@gmail.comwrote:
Anyone know how to read Isotemp OXCO131 part numbers?
For example on eBay there are 131-2,
Yes, the HBG has gone... I wasn't able to record the last transmission. If
I suspected that the shutdown was casual I'd have written an audio time
lapse with amplitude trigger to let my PC record overnight. My
WandelGoltermann SPM-3 with the 1500Hz IF output is great at this task,
but I was
Pieter, please, would you be so kind as to share, for example, the last 60
seconds file?
Thank you
On Sun, Jan 1, 2012 at 10:16 PM, Achim Vollhardt avoll...@physik.uzh.chwrote:
No HBG clock but a HBG-disciplined OCXO in our lab.. we forgot to change
the receiver to DCF77 but will have to do
PI controllers can be implemented analog only. For the PPS they need
large capacitors that are the equivalent of averaging (sum and accumulate)
in a software implemented controller.
On Sat, Dec 31, 2011 at 7:54 AM, Chris Albertson
albertson.ch...@gmail.comwrote:
On Fri, Dec 30, 2011 at
The HBG has survived the 00:00 CET and the 00:00 UTC. I was fulfilling the
task of recording the final transmission instant but now I don't know how
to proceed. Unfortunately I have no audio time lapse recorder at hand and I
have no more ideas about the time when they will shutdown.. Maybe I have
How can you tell that your GPSDO consistently beats the TBolt?
On Fri, Dec 30, 2011 at 5:58 AM, Mark Spencer mspencer12...@yahoo.cawrote:
Yes that is correct. I have one of the units made by James Miller G3RUH.
I had hoped to build some something along these lines on my own, but the
The analog computer is the standard good-old-PLL: if you have the 10KHz
from a Jupiter than your analog filter will be simple to build. If you have
only the PPS (or 100PPS from an Oncore) your analog filter will require
more attention (and large capacitors) but I think it is realizable. You
analog
Yes, it can be done based on a PPS only timing. You must design a PI (maybe
PID) regulator: the EFC must stay steady when the phase difference between
the two PPSes is zero (integral action). Then you must move the EFC (when
there is a difference) proportionally with the difference itself and only
You can use the LEA5-T too that is a timing GPS receiver and supports the
position hold down-to-1-bird timing mode.
On Fri, Dec 30, 2011 at 8:59 PM, Murray Greenman denw...@orcon.net.nzwrote:
Two thoughts re Simple GPSDOs:
1. For a conventional 1pps approach, see 'A Simple GPS Disciplined
Usually timing grade GPS receivers have better PPS outputs than navigation
GPS receivers and timing grade receivers support the so called position
hold mode that provides a valid PPS output even if only 1 bird is being
received.
Yes, it is better to implement the PPS synchronization in the digital
Yes, the DAC+reference is challenging and one way to go may be the
coarse+fine approach to avoid large (18bit and beyond) DAC. My last GPSDO
has an 18bit DAC but now I'm thinking to try the 8bit digital pot + 16bit
DAC op-amp combined. The reference can't be overlooked anyway.
On Fri, Dec 30,
No free lunch, of course, but I want to avoid dithering DACs. The 18bit DAC
(AD5680) is a 16bit+dithering, I think to use the AD5660 + AD5241 (already
available) the pot has a tempco of 30ppm/degree and a noise of
14nV/sqr(Hz). Maybe I have to find something better but to make the first
try is
Artifacts from the TDS210, not from the Rb.
On Thu, Dec 29, 2011 at 8:14 AM, mike cook michael.c...@sfr.fr wrote:
Hi,
Just got my cheapo 5680A. It was accompanied by a little teddy bear
clutching a L7805CV !
Got a couple of questions.
1) What is the expected 10MHz peak to peak voltage.
For some notes on how to connect an external oscillator to the TBolt see:
http://www.thegleam.com/ke5fx/tbolt.htm
On Thu, Dec 29, 2011 at 2:15 AM, Chuck Forsberg WA7KGX N2469R
c...@omen.comwrote:
Is there a schematic available?
I have a Tbolt that came with a failed oscillator that might
, Chuck Forsberg WA7KGX N2469R c...@omen.com
wrote:
I'm afraid I wasn't clear. I need a schematic for the FE-5680A
so I can add an analog freq control to it.
On 12/29/2011 12:59 AM, Azelio Boriani wrote:
For some notes on how to connect an external oscillator to the TBolt see:
http
Thank you, Burt.
Azelio IW2DMO, JN55BK
On Sat, Dec 24, 2011 at 9:14 PM, Burt I. Weiner b...@att.net wrote:
I just wanted to take a moment to wish all of you a Merry Christmas and a
Happy Hanukkah. May the New Year bring you good health, stable references,
and much contentment.
Burt, K6OQK
Not the phase directly but the rate of change of the phase and this is
exactly the way you can discipline an OCXO, phase included.
On Thu, Dec 22, 2011 at 8:57 PM, ewkeh...@aol.com wrote:
Using the digital input will only give you 7 E-13 steps. I will use it for
preset.
Bert Kehren
In a
Yes, why move magnets when it is easier to send commands over the serial
link? Or drive the EFC with a DAC for those Rbs that have it.
On Thu, Dec 22, 2011 at 9:53 PM, Chuck Forsberg WA7KGX N2469R
c...@omen.comwrote:
Why have the Arduino move a magnet when it can send frequency offset
10MHz crystals used in OCXO are designed for the temperature of the oven so
it is not possible to find an off-the-shelf suitable crystal. Better find a
crystal coming from an OCXO.
On Tue, Dec 20, 2011 at 7:10 PM, Peter Bell bell.pe...@gmail.com wrote:
Hi, Don
It's been quite a while since I
In Europe the Loran-C is still active (Ireland, France, the Netherlands,
Denmark, Norway and Germany). here in north Italy maybe the Lessay chain is
receivable. I'll test as soon as I receive the Raynav 520 bought on paybay
from Canada very long ago and not yet delivered.
On Mon, Dec 19, 2011 at
Ops, I made a mistake... yes, you're right.
On Tue, Dec 20, 2011 at 12:13 AM, Alan Melia alan.me...@btinternet.comwrote:
There is nothing in Ireland Azelio, that station is in England just south
of
the Scottish border at Anthorn
Alan G3NYK
- Original Message -
From: Azelio Boriani
We too use very close antennae without problems or, better, we haven't
found any evidence of problems. I have found on the usual paybay site the
PROCOM GPS4 GPS antenna that is a QFH-type. The Quadrifilar Helix should
be better than the patch-type antenna.
On Sun, Dec 18, 2011 at 4:00 PM, Rob
And I have seen that the NavSync GPSes even if in position hold mode output
a variable position anyway.
On Sun, Dec 18, 2011 at 11:50 PM, k4...@aol.com k4...@aol.com wrote:
Some GPS receivers automatically go into position hold mode if less than
1 mph is detected for several seconds. However,
Jim, you're right a DAC is not needed: I was thinking of generating the
BPSK by a DAC but it is not necessary. I have seen some BPSK hardware
modulators: easier than generating samples and feeding a DAC.
On Fri, Dec 16, 2011 at 7:42 PM, Hal Murray hmur...@megapathdsl.net wrote:
/17/2011 02:37 PM, Azelio Boriani wrote:
Jim, you're right a DAC is not needed: I was thinking of generating the
BPSK by a DAC but it is not necessary. I have seen some BPSK hardware
modulators: easier than generating samples and feeding a DAC.
For a single bird a digital output could be made
I think every Rb has a finite lamp life...
On Fri, Dec 16, 2011 at 11:41 AM, Neville Michie namic...@gmail.com wrote:
Does the FE-5680A have a similar Rb cell to the LPRO-101?
If so do they have finite lamp life, (can you find the one you buy has
little life left?)
Or by not reporting the
are all that is necessary.
-Chuck Harris
Azelio Boriani wrote:
I think every Rb has a finite lamp life...
On Fri, Dec 16, 2011 at 11:41 AM, Neville Michienamic...@gmail.com
wrote:
Does the FE-5680A have a similar Rb cell to the LPRO-101?
If so do they have finite lamp life, (can you
A used Spirent is only 26K to 37K. Interesting: playing back bits from
RAM... can it be that simple? Obvious: a DAC is required.
On Fri, Dec 16, 2011 at 3:47 PM, Jim Lux jim...@earthlink.net wrote:
On 12/15/11 10:25 PM, Chris Albertson wrote:
For testing, I'd assume the gps simulator only
SD-SDI 270MHz, then there is the HD-SDI.
Brooke, the 77.503KHz you mention for the DCF77: are you sure the IF is
3KHz? 77.503KHz is 77.5KHz + 3Hz...
On Thu, Dec 15, 2011 at 11:54 AM, Heinzmann, Stefan (ALC NetworX GmbH)
stefan.heinzm...@alcnetworx.de wrote:
13.5 and 27 MHz are usually
Yes, you're right: we are always students and there's always something to
learn here from timenuts not only about precise timefrequency.
On Thu, Dec 15, 2011 at 5:24 PM, Brent Gordon time-n...@adobe-labs.comwrote:
From the NI web site
Yes, now wondering if there are L1/L2 simulators out there... better
googling around.
On Thu, Dec 15, 2011 at 11:35 PM, li...@lazygranch.com wrote:
It depends on if they use the civilian or military GPS signal. Spoofing
the military signal should be tough.
Inertial guidances isn't all that
I agree. This is my opinion too.
On Thu, Dec 15, 2011 at 11:50 PM, David VanHorn
d.vanh...@elec-solutions.com wrote:
Note that the undercarriage is always hidden when it's shown.
I suspect they simply jammed the GPS and command links, and it defaulted
to an automatic soft landing on not so
Thank you for the link.
On Thu, Dec 15, 2011 at 11:58 PM, Jean-Louis Noel j...@stben.net wrote:
Hi,
From: Azelio Boriani azelio.bori...@screen.it
Yes, now wondering if there are L1/L2 simulators out there... better
googling around.
http://wireless.vt.edu/symposium/2011/posters/GPS
The Spirent STR4500 seems very up-to-date, very expensive, L1 C/A only.
On Fri, Dec 16, 2011 at 12:02 AM, Azelio Boriani
azelio.bori...@screen.itwrote:
Thank you for the link.
On Thu, Dec 15, 2011 at 11:58 PM, Jean-Louis Noel j...@stben.net wrote:
Hi,
From: Azelio Boriani azelio.bori
OK, now I know what a GPS simulator is like. BTW the Spirent is cheaper at
used-line.com than on paybay. Anyway my opinion doesn't change: as pointed
out by David VanHorn they have jammed the GPS and the data link. I think
the data link must be a sophisticated frequency hopping type radio link so,
Of course, but then when you switch on your transmitter you are on your
own. Considering the speed of a drone (700Km/h?) you need a great coverage,
so much RF power out.
On Fri, Dec 16, 2011 at 12:22 AM, J. Forster j...@quikus.com wrote:
You could just have a GPS receiver and use that to sync
Yes, agree. An OCXO is enough (but my opinion is the same: only jammed not
steered).
On Fri, Dec 16, 2011 at 12:52 AM, Pieter ten Pierick
time-nuts-m...@tenpierick.com wrote:
Hi,
Of course, but then when you switch on your transmitter you are on your
own. Considering the speed of a drone
You can download a 30-day demo version of TimeView from the SpectraCom web
site.
On Wed, Dec 14, 2011 at 1:13 AM, gandal...@aol.com wrote:
Earlier this year I got a very good deal on an as new Tektronix FCA3100
Timer/Counter/Analyzer, which turned out to be a rebadged Pendulum CNT91.
I have the Fluke PM6681: it has no talk-only function on the GPIB port. If
the CNT81 has the same software then TimeLab can't get data from the
CNT81/PM6681. Anyway I can write a logging software (for free, of course)
to grab data so that you can post-process it with whatever you want (I use
The 63.8976MHz frequency seems to be related to the OFDM frame of the WiMAX
standard that has a window of 62400 bytes and the 63.8976MHz can time WiMAX
BaseStations with only powers-of-2 dividers.
On Wed, Dec 14, 2011 at 11:24 PM, paul swed paulsw...@gmail.com wrote:
Could be but as a timenut
Injection locking: perhaps the first to document this effect was indeed
Christiaan Huygens.*
*
On Tue, Dec 13, 2011 at 10:28 AM, Jim Palfreyman jim77...@gmail.com wrote:
Gentlemen, gentlemen and gentlemen!
We are time-nuts. Accuracy is paramount. We are scientists.
Please steer clear of
mount PC board as these parts are still around. See options here :
http://www.ko4bb.com/dokuwiki/**doku.php?id=precision_timing:**pictichttp://www.ko4bb.com/dokuwiki/doku.php?id=precision_timing:pictic
Stanley
- Original Message - From: Azelio Boriani
azelio.bori...@screen.it
Yes, your're right: higher than CMOS, I was too high.
On Mon, Dec 12, 2011 at 10:53 AM, Hal Murray hmur...@megapathdsl.netwrote:
Better use 74HC or 74HCT parts, the 74F should be TTL FAST parts that
require high input current to be driven correctly.
HC/HCT are pretty slow. I'd carefully
Aha, there is a near-field for gravity too? Interesting... going to google
for gravitational near-field at once!
On Mon, Dec 12, 2011 at 11:19 PM, Magnus Danielson
mag...@rubidium.dyndns.org wrote:
On 12/12/2011 01:37 AM, Jim Lux wrote:
On 12/11/11 4:04 PM, Tom Van Baak wrote:
GCPC --
OK, you are referring to the gravitational field just inside the mass as
near field. I was thinking about something like the near EM field.
On Tue, Dec 13, 2011 at 12:46 AM, b...@lysator.liu.se wrote:
Folks,
Actually, the USGS goes around measuring the local gravitational
constant
Better use 74HC or 74HCT parts, the 74F should be TTL FAST parts that
require high input current to be driven correctly.
On Sun, Dec 11, 2011 at 9:04 PM, Chris Albertson
albertson.ch...@gmail.comwrote:
Looking at the picric II schematic. Trying to decide on the bet
substitute parts for some
Actually on the usual auction site there is a (they say) BVA-like 5MHz
oscillator from QuartzLock (item 150712824699). Of course it is not clear
if this BVA-like refers to the dimensions of the unit or the resonator
technology. From the pictures I can't figure out a model number...
On Thu, Dec 8,
The price is very high (for me) but on the usual auction site again you can
find an FTS1050 too: 150714877944
On Thu, Dec 8, 2011 at 2:34 PM, John Ackermann N8UR j...@febo.com wrote:
Hi Mark --
This may be challenging. A good FTS-1050 can be very, very good indeed.
I have one that seems to
--...Sell the junk...-- I wouldn't consider junk something that has
taken part to a test for 10E-13... anyway I think it'll be expensive that
kind of test.
On Thu, Dec 8, 2011 at 5:57 PM, Bob Camp li...@rtty.us wrote:
Hi
A device that's known to be at a legitimate 5x10^-13 at 100 seconds,
Yes, I remember that thread.
Anyway, Hal, are you suggesting to use the 3.2GHz clock to crank up the
counting speed? OK, strange, but can be a way...
On Wed, Dec 7, 2011 at 1:23 AM, Bob Camp li...@rtty.us wrote:
Hi
There was a point in time where a general purpose board could have been
done
Yes, with an analog interpolator you can. Without an analog interpolator
and without using the vernier delay line (and other tricks like that), the
FPGA can only get to nS resolution so far (for example, in a Spartan3 or
equivalent). To implement a vernier delay line you need also to control the
.
The amount of hassle goes up as your resolution gets better. Without heroic
efforts, sub 200 ps is quite possible.
Bob
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Azelio Boriani
Sent: Tuesday, December 06, 2011 10:25 AM
I have read the two papers about the wave union TDC but still wonder if
anything reasonable could be done without:
1) place every single gate by hand on the target silicon
2) heavy postprocess the data to obtain results
Something like: I have a Spartan3, the WebTool suite from Xilinx and, yes,
I
I agree: better using a cheap counter (using the GPSDO to sync it). However
to do a time interval measurement your sampling frequency must be stable
enough between the reference PPS and the PPS-under-measure. The trick is to
offset the PPS-under-mesure enough (say 100mS) to gether some stable
Man, what should we follow if not the manufacturer datasheet? Everyone can
predict that the best results are obtained following the component's
datasheet. Indeed maybe, after having followed the datasheet, that you can
improve something.
On Fri, Dec 2, 2011 at 11:51 PM, Kevin Rosenberg
I had a bad experience with chinese sellers: I got a Z3815A with the Furuno
GPS enclosure completely rusted and a LPFRS that I suspect was submerged in
water: rusted and corroded internally tough still working... the seller has
agreed to send another one.
On Thu, Dec 1, 2011 at 11:18 AM, Attila
The LPFRS has 2 heating elements on both tube ends and a crystal glued on
the tube.
On Thu, Dec 1, 2011 at 9:46 PM, Steve . iteratio...@gmail.com wrote:
Are there any other (mosfet)heaters on the oven cavity? Seems that heating
from one point is going to create a large temperature gradient
Try to re-initialize it. I think that it is possible to reset the unit. My
LPFRS, for example, has two commands (F00, C00) to reset the fine and
coarse tuning to the factory default. I have to read the FE5680A datasheet
to confirm but generally digital units have factory defaults, resets,
presets
A long-time data collection? I can test an HP58503A (I think it is the
Z3801A), I have the Z3815A and the TBolt. Of course I need time to test...
On Tue, Nov 29, 2011 at 10:37 AM, Hal Murray hmur...@megapathdsl.netwrote:
ma...@non-stop.com.au said:
Hi All, Risking opening a potential can of
FPGA time interval counter? With an analog interpolator? No? Then, at most,
you will get a nS resolution. I have a 2.5nS resolution TIC with 100MHz
clock using four phases from the Xilinx DCM in a Spartan3.
On Tue, Nov 29, 2011 at 1:23 AM, Michael Malloy mech...@gmail.com wrote:
Ok great thank
Yes, you should start first the utilities included with the Prologix
package: there you will see the name assigned to the USB/GPIB resource and
then use it with your application. I have done that way with the Agilent
82357B (at work) and the Tektronix AD007 (at home but the AD007 is a
networked
Kalman filtering navigation?
On Sun, Nov 27, 2011 at 4:53 AM, WB6BNQ wb6...@cox.net wrote:
Or an alcohol sensor !
BillWB6BNQ
Chris Albertson wrote:
snip
GPS is never going to be exact. Or I should say you don't know the
exact lat. long. for every place you want to go. So to
Yes, if you use statistics then you must be slow or, better, stop and
collect data. I think that ionosphere movements that cause errors are
slower than robots movements so it is hard to collect enough data for
statistics, of course maybe that only two points to average out is better
than
What about a script that sends data to the TRACKBOX (if the BOX is
connected to a PC)? Otherwise a PIC (or anything else of your choice with 2
serial ports) that sends the same data collected from the GPS...
On Fri, Nov 25, 2011 at 6:31 PM, Joe Leikhim jleik...@leikhim.com wrote:
I have a
Usually GPS receivers have DOP figures you can use to estimate the position
precision. Maybe worth using timing receivers for position to increase the
position accuracy.
On Thu, Nov 24, 2011 at 1:01 PM, ehydra ehy...@arcor.de wrote:
Hi all!
I wonder what would be reasonable location accuracy
Or modern counters where internally every type of measurement is reduced to
a time interval measurement like the HP53132 (150pS resolution).
On Thu, Nov 24, 2011 at 8:04 PM, David Bobbett d.bobb...@tiscali.co.ukwrote:
Just as an aside, you /can /get rid of the 'dithering digit' problem if
you
The -12V in the TBolt is not used for the serial port. the HIN232 of the
TBolt goes from the +5V only, it generates the + and - by the usual
switched capacitor technique common to other RS232 interfaces (ADM232,
MAX3221 and so on). The -12V powers the LT1014 quad precision opamp that I
presume
Why is the shunt regulator push-pull? Because of the series regulator first
and the shunt regulator then?
On Tue, Nov 22, 2011 at 8:59 PM, li...@lazygranch.com wrote:
If you want low noise voltage regulation, use a shunt regulator. If the
load is low current, feed it with a floating current
The frequency accuracy is measured based on the EFC variation. I have
recently received my TBolts, not yet fired up, actually preparing the power
supply. Where is the DAC? I can't find... the LT1014 is not a DAC, the SO8
2105 is not an LT2105 nor an LTC2105. The DAC is 20bit as I can read in the
Have you already made calculations? For 200 meters underground I have a
path 20 meter shorter...
On Mon, Nov 21, 2011 at 11:09 AM, Neville Michie namic...@gmail.com wrote:
Has anyone thought about the fact that verticals converge towards the
centre of the earth?
The surface distance is
Monumental! Really amazing...
On Tue, Nov 15, 2011 at 10:07 PM, Kit Scally ksca...@bytecan.com.au wrote:
Fellow Nutters,
Unbelieveable as it seems, this isn't OT.
Cast your eyes on this rare 14th century digital clock. Not a skerrick
of Rb to be found.
Answers on the back of a postcard to
I think this GPIB to RS232 is great if you only have one unit to talk to. I
have designed a similar interface with the ATMEL 89C52 but the drive
strength was enough only for one GPIB unit. With two or more units there
was problems to drive the bus with such a load. It is imperative to use the
Why not a PCI one... yes, it is $100 and an AT card is $40 but maybe a PCI
one has no (or much less) compatibility issues. Is the BX6 mobo working
with other AT-type cards? Can you test with any other AT card?
On Mon, Nov 14, 2011 at 8:56 PM, Chuck Forsberg WA7KGX N2469R
c...@omen.comwrote:
Yes for 12-hour display but here in Europe we usually have 24-hour
displays. Of course analog clocks are always 12-hour.
On Sat, Nov 12, 2011 at 11:39 AM, Magnus Danielson
mag...@rubidium.dyndns.org wrote:
On 11/12/2011 10:46 AM, Robin Kimberley wrote:
OK, my fault: better googling around before replying. There are mechanical
24-hour wristwatches too.
On Sat, Nov 12, 2011 at 1:59 PM, Magnus Danielson
mag...@rubidium.dyndns.org wrote:
On 11/12/2011 01:08 PM, Azelio Boriani wrote:
Yes for 12-hour display but here in Europe we usually have 24
Yes, as some GPSes need a DC path to recognize a valid antenna I
modify the cheap satellite/TV splitters with a 270ohm (also 220, 180,
150 will do) resistor between output F connector center and the GND.
On 11/7/11, paul swed paulsw...@gmail.com wrote:
Indeed I used a cabletv/tv line amp for
In my company we use home satellite/TV splitters to distribute the GPS
antenna over tens of GPSDO units. Usually we split multiple times one
single antenna without much problems. Yes, at times the satellite count is
low but this is considered a useful test.
On Sun, Nov 6, 2011 at 11:54 AM, Chuck
Yes, I have seen that some old Loran receivers (like the Apollo 612B) have
fixed preprogrammed chain delays (GRIs) and others (like Raynav 520) can be
set with a variable delay.
On Sun, Nov 6, 2011 at 12:47 PM, Magnus Danielson
mag...@rubidium.dyndns.org wrote:
On 11/06/2011 12:25 AM,
Lucky you having found an FS700 cheap. On the usual epay there is one for
$600. The Loran C was shutdown in 2010 in the USA. Here in Europe there are
left few sites to cover the north. The Lessay chain is the nearest for me.
All the south chains were shutdown long ago.
On Sun, Nov 6, 2011 at
What about the Racal Instruments (Racal Dana) 2351 8pS, 300MHz? Yes, it is
VXI but 8pS one-shot seems interesting...
On Mon, Oct 31, 2011 at 10:24 PM, Arthur Dent golgarfrinc...@yahoo.comwrote:
Has anyone looked into the Picotest (also sold as Array) U6200A TIC?
Looks like DC-6Ghz with 12
Wow, what has made you think that this list is intended to sell something?
Anyway, are you sure that an 14DIP OCXO suits your needs? What will drive
the EFC?
On Mon, Oct 24, 2011 at 3:50 AM, Geraldo Lino de Campos
gera...@decampos.net wrote:
I am in the time-nuts list, and interested in
Command line? For the windows command prompt? I can write one for you...
On 10/18/11, Tim Tuck t...@skybase.net wrote:
Hi all,
Does anyone know of a simple program to capture the frequency data from
a HP 5316B over a time period via GPIB ?
I'd like to do some tests on some oscillators I
I forgot to say that it is free, of course.
On 10/18/11, Azelio Boriani azelio.bori...@screen.it wrote:
Command line? For the windows command prompt? I can write one for you...
On 10/18/11, Tim Tuck t...@skybase.net wrote:
Hi all,
Does anyone know of a simple program to capture
Yes, uBlox is GLONASS-ready but no units actually available.
On 10/18/11, Yuri Ostry y...@ostry.ru wrote:
Hello,
Tuesday, October 18, 2011, 12:01:46, Attila Kinali wrote:
A On Mon, 17 Oct 2011 08:53:51 -0700
A WarrenS warrensjmail-...@yahoo.com wrote:
So where do I get a cheap, used
Yes, there is a GLONASS navigator: the EXPLAY GN510, ePay item 150659387614.
On Tue, Oct 18, 2011 at 11:33 PM, David VanHorn
d.vanh...@elec-solutions.com wrote:
So GLONASS is cool, even if they do land more of them in the ocean than
in space ;-)
They are just getting their Low geosync
Oh my, you're absolutely right... I've totally missed out those few lines!
Now I understand. I apologize and go immediately to search for a Tbolt. A
similar design is the ConnorWinfield/NavSync FTS125 but instead of
disciplining an OCXO they use a 20MHz fixed OCXO (without EFC) to drive the
GPS
Your work is very interesting, now I wonder what is the Tbolt
single-shot resolution? Does the Tbolt use the analog interpolator
method? I don't have the Tbolt, I have an HP58503A at work as the only
reference.
On 10/13/11, WarrenS warrensjmail-...@yahoo.com wrote:
John wrote:
I'm curious where
Are you referring to Kalman filtering/steering? Yes, it depends on how
accurate is the model of the oscillator (and the dimensions of the
Kalman filter) but it can work for several hours not indefinitely.
On 10/13/11, Chuck Harris cfhar...@erols.com wrote:
Because the aging of oscillators is
going on, taken over a one second time interval.
ws
*
- Original Message -
From: Azelio Boriani azelio.bori...@screen.it
Your work is very interesting, now I wonder what is the Tbolt
single-shot resolution? Does the Tbolt use the analog interpolator
method? I
greater than the resolution so averageing works fine
ws
Azelio Boriani azelio.boriani at screen.it
OK, so the Tbolt hardware resolution is 100pS. If you have a hardware
resolution of 100pS and do an average over the data, yes, you can obtain
greater resolution but your data has
I'm reading today the press release but on the 26th of August the
METAS (the Swiss federal office of metrology) decided to shutdown the
HBG time transmitter (located in Switzerland) by the end of the 2011.
Here in Europe the main reference for the radiocontrolled clocks is
the DFC77 station in
Yes, they (the Swiss federal authorities) say it costs too much.
On 10/12/11, paul swed paulsw...@gmail.com wrote:
Wow some old standards are going away. I have copied those in the US in the
past.
Looks like all of the LF stuff is going away.
On Wed, Oct 12, 2011 at 8:29 AM, Azelio Boriani
down by
shortsighted governments, putting more and more eggs into fewer and fewer
baskets.
I wonder how long it will be before the only remaining basket of will
suffer a catastrophic fall.
:(
-John
On 12/10/11 17:33, Azelio Boriani wrote:
Yes, they (the Swiss
Yes, I recommend switching to a networked GPIB interface. I have long
waited to acquire a used E5810A and at last I succeeded. Of course it
was not so cheap (380$) but very versatile to use. At work I use an
Agilent 82357B, highly recommended. Frequently pops up on eBay, not
cheap but you can find
of 82357B USB-GPIB adapter - does anyone have any experience of the
Chinese clones, for example: http://cgi.ebay.co.uk/180734845086
Thanks
Dave
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Azelio Boriani
Sent: 10 October 2011 15
Take care that you need the correct line drivers. Before the 82357B,
the E5810A I used an Atmel AT89C55 to develop a GPIB-serial adapter
but only one GPIB device I was able to drive...
On 10/10/11, Tijd Dingen tijddin...@yahoo.com wrote:
Would it be possible to fake an interface with a
I know that few of the GPS constellation satellites carry a Cs clock instead
of the Rb one: is it possible to take advantage from this? I think not
because Cs and Rb satellites are equally well steered but using the masking
options of GPS receivers maybe that Cs clocks can help.
On Fri, Oct 7,
Wow again,
while digging for more info about the MiniBVA I came across this paper from
Enrico Rubiola (and others)
http://www.femto-st.fr/~rubiola/pdf-articles/journal/2010rsi-Elisa.pdf
showing how a cyocooled oscillator can achieve 10E-15 frequency stability at
10GHz from 1s to 1000s.
In the
Sorry,
oven schematic not over, moreover, yes, it is not Rubiola's website that
hosts the paper but I started from rubiola.org to reach femto-st.fr where
the PDF is located.
On Wed, Oct 5, 2011 at 1:31 AM, Azelio Boriani azelio.bori...@screen.itwrote:
Wow again,
while digging for more info
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