> I guess I'll forgo the "pleasures" of WIN7 and stick with my XP Laptop.
> Maybe some day it will different.
It'll work fine under Window 7 and 8 (I use Windows 7 x64 to develop, while
my LH monitor is an older laptop with Win2K.)
> BTW, I tried a "Beta" version of Lady Heather, when I try to ex
Oops, sorry, I read "70820" for "70420," disregard that last link.
-- john, KE5FX
Miles Design LLC
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-
> boun...@febo.com] On Behalf Of John Miles
> Sent: Saturday, March 30, 2
Hi, Tom --
A paper in the 2010 EFTF described the use of a pair of 11848A boxes from
the 3048A system, which is similar to the E5500 hardware (
http://www.congrex.nl/EFTF_Proceedings/Papers/Session_14_Oscillators_and_Noi
se/14_04_Bale.pdf ). You could ping those authors if you haven't already.
Al
It has caused a lot of confusion, admittedly. That's why, in the more
recent releases, I changed the label on the icon to "KE5FX TBolt (Seattle,
USA)." But it seems that's still not enough of a hint, because people still
write me from various countries asking why their Thunderbolt's location is
o
> >
> > With most modern lightweight Rb's the OCXO is integrated into the same
> heater block as the physics package. That makes it a bit tough to heat one
> without heating the other. .
>
> On LPROs the OCXO sits on the opposite side of the board.
Pretty sure that's not an OCXO. If it is, it's
> It was my impression that the Symmetricom device and the Miles device
> were identical in performance / capabilities. The issue with the
> Symmetricom device is that you unlock features on a "cost per feature"
> basis. If there are other capability limits past that, that's very bad
news.
>
The
I do like the strain reliefs on the Pomona cables, but the cables themselves
are leaky as expected. A couple of points:
1) If you don't have any other signal sources in your environment that are
close to your measurement frequency but not coherent with it, you'll
probably be OK with single-shield
Sounds like a bad OCXO. The crystal frequency jumps slightly, and the
disciplining loop then has to compensate by steering the DAC voltage
through the loop filter. If that's the problem it may get better if you
leave it running for a few more weeks.
The smoking gun is the attack/decay character
I'm not sure about the Racal, but the HP 5345A can be placed into talk-only
mode and used to stream readings to TimeLab in "Acquire->Acquire from
counter in talk-only mode" . JohnA's link is the right one to use.
The advantage to trying it with the HP 5345A is that I have one around here,
so I ca
> Tom,
>
> On 02/13/2013 05:04 AM, Tom Van Baak wrote:
> > Magnus,
> >
> > Two things to check.
> >
> > 1) Is the bump you see at all correlated to the relative frequency
between
> the two oscillators? I have seen this when comparing two ULN, for example.
> You can make the bump move left or right
out the 1.4V drop across the Darlington, just the resulting
noise.
-- john
Miles Design LLC
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3 of
http://cp.literature.agilent.com/litweb/pdf/N9068-90005.pdf , for example.
-- john
Miles Design LLC
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-
> boun...@febo.com] On Behalf Of Azelio Boriani
> Sent: Monday, January 14, 2013 7:33 AM
> To: D
izers is used to downconvert a much quieter 400 MHz source for
measurement at 9 MHz.
In principle you can indeed use a pair of $10 TCXOs as references to measure
arbitrarily low-noise DUTs, but you may need to run the measurement for days
or weeks.
52A/B
literature, the TSC 5120A-01 manual and white paper by Sam Stein, and Enrico
Rubiola's book/website.
-- john
Miles Design LLC
> On Sun, Dec 30, 2012 at 10:44 AM, Bruce Griffiths <
> bruce.griffi...@xtra.co.nz> wrote:
>
> > Tom Knox wrote:
> >
> >> Du
LL is sort
of an intermediate solution, aimed at being as simple as possible while
still being useful in real-world programs.
(Run GPS.EXE without any options to see the current usage notes.)
-- john
Miles Design LLC
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:t
I thought I had a schematic
for that one around here somewhere but can't seem to find it at the
moment...
-- john
Miles Design LLC
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and follow the instructions there.
ptom isn't one that I've been observing.
> John I could not see the info you refered to?
Here's a direct link to the attachment:
http://www.ke5fx.com/5065a.png
-- john
Miles Design LLC
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Hi, Luciano --
The sampling interval would be whatever rate the counter is returning
readings, as usual. I usually let the acquisition driver estimate the rate,
unless I know it's exactly one reading per second.
In frequency mode, the scale factor should be 1E-6. You need the program
to treat
Neat data set! This says a lot about the stability of your HP supply. The
choice of current-sense element makes a big difference in a YIG driver
circuit, and most wirewound resistors fall into the "Don't ask" category.
Would be interesting to try the same test with one of the cheap Chinese
pow
or mixer, otherwise I'd use an analog quadrature PLL.
-- john
Miles Design LLC
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-
> boun...@febo.com] On Behalf Of Adrian
> Sent: Wednesday, December 05, 2012 4:40 PM
> To: Discussion of precise t
Thanks, guys! Sorry about the price increase, that wasn't my doing. :)
-- john, KE5FX
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-
> boun...@febo.com] On Behalf Of Tom Knox
> Sent: Saturday, December 01, 2012 4:33 PM
> To: Time-Nuts
> Subject: Re: [time-nuts
rt on
the other. Fortunately the LEA-6H's USB output worked great when I added
the cable.
-- john
Miles Design LLC
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-
> boun...@febo.com] On Behalf Of Bob Camp
> Sent: Thursday, November 15, 2012 4:10 PM
>
asuring.
For best ADEV fidelity you'd want to use TI measurements rather than
frequency measurements, but frequency measurements are obviously much easier
to set up. They can give you a good overall idea of what's going on.
-- john
Miles Design LLC
> -Original Message-
&
That's extremely interesting, Adrian. I've never heard of a noisy varactor,
but then I've never looked for one, either. It'd be great if some of the
problems that have been blamed on jumping crystals were in fact caused by
the tuning diode. What steps did you take to rule out the crystal and
nar
I bought a couple of 5071As on eBay recently, on the basis that the various
status messages shown in the auctions didn't look like tube failures. They
both reported Cs oven voltages at 0.0.
The first unit turned out to have a severe intermittent noise problem,
originating somewhere other than th
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-
> boun...@febo.com] On Behalf Of Jerry
> Sent: Thursday, September 27, 2012 4:08 AM
> To: time-nuts@febo.com
> Subject: [time-nuts] Lady Heather on Laptop
>
> I am using a dedicated fast pro9cessor laptop but Lady
>From what I've seen, peaking the lamp voltage with the trimmer capacitor on
an LPro does not improve the stability. It may even get a bit worse. This
was the case on a couple of different units; I didn't investigate further.
-- john, KE5FX
www.miles.io
> -Original Message-
> From: tim
> >10MHz +9dbm
> >20MHz-50dbm
> >30MHz -37dbm
> >no obvious higher harmonics
> >broad noise envelope at 60 > 75MHz @ -60dbm peak
> >
> >Are these results typical or might I have an adjustment or other problem?
I seem to have missed the part where it's explained why anyone cares about
the
> John
> Oven did reduce in current and I can not imagine that it would be that
> close with an overheated oven. At 0 V it is within .5 Hz of what they
normally
> are. Ground has no effect but even 0.8 V on pin 2 stops oscillation
That's a suspicious-sounding voltage. Are you sure you're not
forw
> In a message dated 8/9/2012 8:07:24 P.M. Eastern Daylight Time,
> b...@lysator.liu.se writes:
>
> Hi Bert,
>
> So the EFC does not work at all? (or did I miss something obvious?)
>
> /Björn
>
> > The unit starts high and over 20 minutes comes down to 4.975 with 0
V
> > on the EFC. Any
> Yup... I'm still playing with the screenshots from TimeLab; on my machine by
> default they come out at 13xx pixels wide, and I usually size to about 700
> wide for web display. As an experiment, I tried using the "WIDTH" and
> "HEIGHT" options in the IMG SRC tag, setting to a percentage rather
> would an AD measurement also benefit from Cross-Correlation or would we
> need
> 2 cross correlated disciplined ocxos for that? Being able to measure AD
> below that of a single reference would be a dream which could help a lot
in
> avoiding to buy a H2 maser for low AD at all taus.
Unfortunatel
> They have their own cross-correlation system; it's not highly automated
but
> claims -190 dBc/Hz capability:
> http://www.wenzel.com/pdffiles1/PNTS%201000/BP-1000-CC.pdf
Yes, this is equivalent to the "dual HP 3048A" technique. An inelegant
weapon from a less-civilized age but still, you re
> Magnus inspired me to try my own cross-correlation experiment with the
> TimePod today. I used two fairly normal OCXO frequency standards as the
> reference, and a Wenzel 5 MHz ULN as the device under test.
>
> By doing single-reference measurements of each OCXO versus the ULN, I
> was able to
>
> I've heard and read some documents about using cross-correlation using
> two distinct reference oscillators when trying to measure the phase
> noise from a source to reduce the influence of the reference
> oscillators phase noise.
>
> Unfortunately, it's still not exactly clear to me how it w
> > I can't guarantee anything, but I'd be surprised if Fluxclene didn't
> > do the trick:
> >
> > http://www.electrolube.com/docs/cleaningmain.asp?id=13
> >
> Thanks I'll give it a try.
Also try some naptha (sold as lighter fluid, or as a product called
"Goof-Off.")
-- john, KE5FX
Miles Design L
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
> Behalf Of WB6BNQ
> Sent: Monday, July 23, 2012 3:07 PM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] Heather Problem..
>
> Hi Bud,
>
> the /2 should be
> I see that from one way or the other, we always end up in a TimePod. OK,
> then the TimePod has no comparator, no trigger but has A to D conversions.
> Is the A/D conversion process supposed to be threshold-free?
Hey, everybody needs at least one or two TimePods. :) You can use a TimePod
or TS
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
> Behalf Of Azelio Boriani
> Sent: Friday, July 06, 2012 2:36 PM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] disciplining sound card
>
> Exactly: this
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
> Behalf Of Ron Ward
> Sent: Wednesday, July 04, 2012 10:12 PM
> To: 'Discussion of precise time and frequency measurement'
> Subject: Re: [time-nuts] timelab
>
> Hi:
> I am also new and would
> > The sample rate field in the dialog box is only used to tell TimeLab
> > what
> > the actual data rate is. The program doesn't alter the counter's
> > controls
> > at all.
>
> good. That will be very easy to do. Are there any tricks to use in your
> prologix setup program?
Meaning the one fr
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
> Behalf Of Don Latham
> Sent: Wednesday, July 04, 2012 9:37 PM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] timelab
>
> Thanks, John. When I did the 1s
Hi, Don --
You can view all of the measurement types (ADEV, MDEV, HDEV, TDEV, phase
difference, frequency difference) regardless of whether you are acquiring TI
or frequency data from the 5370. The performance floor will be somewhat
better in TI mode, and long-term frequency chart readings will b
> Ahhh ... Thanx now i know why my 1hr Trace Duration was so fast.
> I assumed that Timelab would set the sampling interval written in Timelab
> via GPIB. But i'll just select 1sec manually.
That can be a bit confusing. The TimeLab drivers for GPIB counters don't
attempt to program the counter in
Shhh, I was hoping he'd succeed in his apparent attempt to drive 5065A
prices down, so I can round up a few more for myself!
$78 is a great price for an LPRO-101, certainly, but you can't compare them
to the HP rubidiums. The latter's specs (as well as its "secs") are vastly
better.
Edgard
> Edgardo,
>
> I would think something in the $500 range for a working unit would be
worth
> considering, depending on options, condition, etc. Anything lower would
be
> better. More depending how 'addicted' you might be to these.
Just to have it on record, anyone who is having trouble unloadin
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
> Behalf Of mike cook
> Sent: Wednesday, June 20, 2012 3:28 PM
> To: time-nuts@febo.com
> Subject: Re: [time-nuts] Lady Heather V3.10 release
>
> Le 21/06/2012 00:18, mike cook a écrit :
> >
> >
Another long-awaited announcement:
http://www.ke5fx.com/heather/readme.htm
Highlights of V3.10:
- No longer a beta!
- Added support for Nortel NTGS50A-series receivers
- Added support for Resolution-T and Resolution SMT receivers
- Various other stuff added by Mark in the 18 months sinc
> Hi John,
>
> Congratulations on a good design.
Thanks!
> Why the 78 MHz sample frequency ?
Long story: it's mostly arbitrary, but at least with some ADCs, it's
beneficial to spur performance if the first few dozen harmonics of the ADC
clock rate and the most commonly-used test frequencies don
> I was recently reading the manual for the TimePod. It looks quite
> nice. I'm curious as to the price.
I haven't really done a formal "product announcement" on the list or
anywhere else beyond the PTTI show last November, for two reasons. One is
that the PTTI introduction led to a larger-than-
> Unfortunately, although i have a reasonable park of measurement
instruments,
> none of them are in the precision range that i'd need to characterize
> the 8663's.
>
> I have three oscilloscopes (analog 20MHz, digital 200MHz and 1GHz),
> a cheap handheld frequency counter and a couple of multimet
> Another artifact you can see is a small spur that can probably be blamed
on
> the flashing LED. The LED and its associated PCB traces is not far from
the
> DB-9 output jack. I actually thought it seemed to be blinking a little
bit
> faster than 1-pps, and sure enough you can see a small bump ar
> I saw that on eBay, it is great to see a fellow Time Nut won it. I would
think
> Phase Noise is excellent with the 8663, although I would prefer a version
with
> discrete SMA's on the outputs.
It's not very quiet, unfortunately, but I'll bet this one would look better
if I were to remove it from
Just picked up an interesting piece of hardware on eBay that I hadn't
encountered before, an Oscilloquartz 4532 GPS receiver as described here:
http://www.oscilloquartz.com/index.php?pageid=37
It was selling for about the same price that Thunderbolts from China have
been fetching, but it us
I'll be there as well. Glad to hear so many folks from the list are able to
make the journey!
-- john
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
> Behalf Of Magnus Danielson
> Sent: Wednesday, May 16, 2012 12:54 AM
> To: time-nuts@febo.
order. Assuming it works, I'll get with Mark when it
arrives and we'll put a new LH build together, based on whatever protocol
documentation we can come up with.
-- john
Miles Design LLC
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It looks great, if we're talking about the zipped 150+ MB file. OCR never
works 100%, but the originally rendered text seems to be intact everywhere,
unlike cases where the scan program tries to replace it.
Unfortunately some of the most confusing errors were part of the manual as
originally pr
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-
> boun...@febo.com] On Behalf Of Dave M
> Sent: Saturday, April 07, 2012 12:51 PM
> To: time-nuts@febo.com
> Subject: Re: [time-nuts] 5370B Manual - Searchable?
>
> > From: paul swed
>
> > Send it to didiers sit
The large (129 MB) copy in the Manuals section of www.ko4bb.com is
text-searchable.
-- john
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-
> boun...@febo.com] On Behalf Of Poul-Henning Kamp
> Sent: Saturday, April 07, 2012 12:41 AM
> To: Discussion of precise
It's a bit worse than that. The DUT and reference phase difference can't be
allowed to exceed 50 ns per trigger interval, in the case where two ~10 MHz
signals are being measured. If the frequencies disagree enough to create a
phase slope greater than that -- meaning if they are more than 5E-8 *
> So I went through the entire instrument and came up with a list of all the
> Sprague TVA electrolytics that I am going to replace as they are dated coded
> 1983.
>
> So two questions. One, can I safely double the capacitance of the filter
> capacitors? (I plan on using the 105C 10K hour high r
> The frequency is always at least >200 to 300Hz off between the two
counters
> and I don't know
> which one to believe. You know the "man with 2 clocks" problem.
>
> Anyone have any idea what may be causing this?
What are you measuring? Are both of the counters' inputs set to 50 ohms,
and if so
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-
> boun...@febo.com] On Behalf Of ehydra
> Sent: Monday, March 19, 2012 3:59 PM
> To: Tom Van Baak; Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] DIY GPS/GLONASS project
>
> Yes, hi
Apologies if this is a dupe -- I'm not sure it ever made it to the list:
> The attached plot indicates the phase noise performance obtainable with
> a wideband FET (OPA653) input opamp.
> With a 10MHz +9dBm input, the phase noise floor is around -163dBc/Hz at
> 1kHz offset and around -154dBc/Hz at
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-
> boun...@febo.com] On Behalf Of Tom Knox
> Sent: Sunday, February 26, 2012 9:41 AM
> To: time-nuts@febo.com
> Subject: Re: [time-nuts] Morion MV89A Repair
>
>
> Is this the paper you are speaking of?
> Google:
> The other interesting thing in the paper is that the short term numbers
> shown aren't into parts in the 13th.
The ADEV plot in figure 3 doesn't exactly show the oscillator in its best
light. The right side of the 'bathtub' is well beyond 1000 seconds with
these parts, if you actually let them
> Are the specs at 5 MHz or at 10? They should be 6 db worse at 10 than at
5.
Now that I'm looking back at the data sheet posted with the auction, they
were indeed specified at 5 MHz. But even after the 6 dB penalty, their spec
limits versus their real-world numbers are pretty marginal.
Morion a
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-
> boun...@febo.com] On Behalf Of Bob Camp
> Sent: Saturday, February 25, 2012 2:55 PM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] Morion MV89A Repair
>
> Hi
>
> The spectr
> I'll add another vote for Eagle. It is a German program written in
> Unix, and ported to Windows. Therefore, you select the action
> first then click on the object of the action. It takes some getting
> used to. There has been a pattern of PC layout companies getting
> cobbled up leaving you
> I still haven't seen the source of LH or serial.exe , any hints ?
server.cpp and the rest of the Heather sources are in the same directory as
the .exe, normally c:\program files\heather or c:\program files
(x86)\heather. (You basically end up with a copy of my development
directory in that fold
> This setup makes me able to connect LH from any machine to a TB.
> But only one active connection is allowed at a time.
>
> So in practice i'm running the 2 x LH against the TB's on the mail-server.
> And "VNC to the mailserver" if i want to see the LH's.
If you use server.exe running on a PC m
> > Being only a 500 MHz Geode CPU, there is not much power to work with.
> Still,
> > running Debian Linux with Wine allowed me to make LH work..
Wine may not be the best platform for a somewhat-nonstandard app like LH.
Suggest buying a cheap laptop running Win2K at a hamfest for $50, and moving
Are you running the v3 beta? I normally run the program 24/7 on a 300 MHz
laptop here, acting as both a server for two Thunderbolts and a client.
There were some improvements to CPU utilization in the current beta, and its
UI response should be essentially instantaneous.
-- john
> -Original
> That is exactly my thinking, but I was looking for a second opinion :)
> We have anyway asked Abracon for pn data on the 40MHz version to be
> sure.
Most likely, the PN improvement will be somewhat better than the expected 12
dB close to the carrier, and somewhat worse than expected (if you see
> The ADEV difference of about 6 db at 1ms tau can be explained by the fact
> that if I apply a 500 Hz LP filter to my 9600 sps raw data, the same
filter
> used on the 5120A's 1K sps data, then even our 1ms ADEV answers
> become very close.
> I have found that using a 1/2 zero tau BW filter like
> Did you ever run any tests on those UCT double oven OCXOs?
Only to the extent of running a short (10-minute) HDEV test after a ~2 hour
warmup, to see if it was capable of anything interesting near t=10s to
t=30s. It showed about 2E-12, and the PN was nothing special, so I didn't
do anything
> Indeed, ADEV is for random freq variation not easily measured by other
means.
Well, no, ADEV is the two-sample deviation of fractional frequency
differences over time. That's really all you can say about it. There's not
really any such thing as "true ADEV" -- a measurement either meets the
ma
> Important note: there's known to be a lot of variability among these
> units, so my sample size of one or two each isn't a guarantee that your
> unit will perform similarly.
Neat. Your FE-5680 noise plots look just like the ones I took. Seems
clear that this particular variant was meant for t
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-
> boun...@febo.com] On Behalf Of bob grant
> Sent: Monday, February 06, 2012 12:41 PM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] Why a 10MHz sinewave output?
>
>
> Some
(Sorry for the dupe, not sure how that happened...)
-- john
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-
> boun...@febo.com] On Behalf Of John Miles
> Sent: Sunday, February 05, 2012 1:46 PM
> To: 'Discussion of precise time and f
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-
> boun...@febo.com] On Behalf Of Joseph Gray
> Sent: Sunday, February 05, 2012 11:04 AM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] PICTIC II questions
>
> John,
>
> Would
> I know it has been a while since the boards were sent out, but I
> finally placed an order with Mouser to populate the two boards I
> bought. I already have the "unobtainium" chips and can program the
> PICs, so no problems there.
>
> The question is, how do I use the PICTIC II after I've assemb
> From your comments, it sounds like you may be measuring one of the
> earlier 5680A's that could be tuned over a large range with a DDS output.
>
> These earlier ones had a 50.25 MHz internal osc which was locked after
> multiplication to the rubidium frequency. Then there was a DDS on the
> out
> Someone earlier today made the point that for all the talk about the FEI
> rubes, there hasn't been any real performance info posted. That prodded
> me to start an experiment I've been meaning to do for a while. I have
> samples of all three of the common telco Rb standards -- Efratom FRS,
> Da
> I was thinking ... There must be someone out there using a Prologix GPIB-
> ETH with linux , that might want to share some code/lib.
>
> I saw a ref. for some Prologix stuff in the TimeLab source (win32 i
> think) , but i can't seem to find the source.
Sorry, I should've been more specific -- w
> > But it misses every other data point after you start the acquisition?
>
> No, every second, the data are acquisite because the shape of the ADEV
line
> on display change due the algoritm. So, I suppose I acquire all the data
are
> incoming, one per second. The trouble is the X axis avance only
'íb' style
>
> In message <041401ccda19$21917480$64b45d80$@pop.net>, "John Miles"
> writes:
>
> >> For porlogix I'll take a look at the timelab source,
>
> We really need a tine-nuts wiki to record stuff like this...
www.ko4bb.com has a
> >Are you using
> > the talk-only option, or the Acquire->HP 53131... option that I just
> added
> > recently?
> R: yes but not work. No input data in monitor mode.
On which driver? Talk-only, or the instrument-specific one?
When I was working on the last set of drivers, I found talk-only suppo
> So for NI488.2 it is clear, I will go finding the
> new stuff in their site... I hope to find ;-)
> It would be great if they have produced some
> table with the old and the new calls. I'll dig.
>
> For porlogix I'll take a look at the timelab source,
> good idea. At the moment I don't own one
>
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-
> boun...@febo.com] On Behalf Of Luis Cupido
> Sent: Sunday, January 22, 2012 6:24 PM
> To: time-nuts@febo.com
> Subject: [time-nuts] GPIB programming 'íb' style
>
> Is it possible to program under Windows, still
> > 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
> > graph vary (as magnitude)every 1 second count, like the event counter
> each
> > second up to 3600,but th
ccasionally be dropped
altogether. Later TSC firmware allowed the data rate to be slowed down to
1, 10, or 100 readings per second instead of 1000, and I imagine that fixes
the problem entirely. However, the TimeLab driver is still hardwired to
assume the data is coming in at 1000 samples/se
's
Ethernet connection will stay up. (Which sometimes isn't very long.)
TimeLab generates its frequency-difference plot from the acquired phase
data, so it will give you various display and filtering options that the
5125A itself will not.
-- john
Miles Design LLC
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-
> boun...@febo.com] On Behalf Of Pete Lancashire
> Sent: Monday, November 28, 2011 3:25 PM
> To: j...@quikus.com; Discussion of precise time and frequency
> measurement
> Subject: Re: [time-nuts] 5087A Output Amp PC
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-
> boun...@febo.com] On Behalf Of Bob Smither
> Sent: Sunday, November 13, 2011 6:01 PM
> To: Discussion of precise time and frequency measurement
> Subject: [time-nuts] PicPlot GPIB to RS-232
>
> Hi List,
>
> Does
nuts] Lady Heather
>
> John,
>
> Does Lady Heather graph any DOP values ? I see what appear to be hooks
> but got
> no action.
>
> BillWB6BNQ
>
>
> John Miles wrote:
>
> > > -Original Message-
> > > From: time-nuts-boun...@febo.co
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-
> boun...@febo.com] On Behalf Of Neville Michie
> Sent: Friday, October 28, 2011 9:30 PM
> To: Discussion of precise time and frequency measurement
> Subject: [time-nuts] Lady Heather
>
> Hi, I have just been rath
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-
> boun...@febo.com] On Behalf Of Bob Smither
> Sent: Tuesday, October 25, 2011 1:46 PM
> To: Discussion of precise time and frequency measurement
> Subject: [time-nuts] HP5370B - Err 02
>
> I have an HP5370B that i
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-
> boun...@febo.com] On Behalf Of Loïc MOREAU
> Sent: Tuesday, October 25, 2011 1:01 PM
> To: time-nuts@febo.com
> Subject: [time-nuts] 8560E DC Coupling phase noise measurements
>
> Hi,
> In the process of measurin
FYI, I've added a couple of photos and plots to my page on Thunderbolt
hacking at http://www.ke5fx.com/tbolt.htm (scroll to bottom for last entry.)
This is just a recap of the earlier discussion on the list regarding
observed PN performance from OCXOs cannibalized from Thunderbolt PCBs,
posted
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