Wrong again.
The integration/averaging referred to occurs when one counts the output
transitions of the VFC for a fixed time interval.
This process needs to be replicated using the sampled EFC data if one is
to measure ADEV.
Bruce
Steve Rooke wrote:
I think I have found the source of the
Richard H McCorkle wrote:
Time-Nuts,
There has been much discussion on this list about methods
of measuring short-term stability. I wanted to make the
list aware of a new paper describing a small DMTD system.
The system was developed by William Riley, author of
STABLE32, and is described in
I'm interested in tracking down a copy of Walls's Cross-Correlation Phase
Noise Measurements from the 1992 IEEE Frequency Control Symposium
proceedings, but apparently the IEEE's no longer offering their traditional
$10 a la carte downloads. If they are, I'm having trouble finding a link
that
On 5 June 2010 19:07, Bruce Griffiths bruce.griffi...@xtra.co.nz wrote:
Wrong again.
No, I'm not wrong Bruce.
The integration/averaging referred to occurs when one counts the output
transitions of the VFC for a fixed time interval.
This process needs to be replicated using the sampled EFC
On 5 June 2010 19:10, Bruce Griffiths bruce.griffi...@xtra.co.nz wrote:
Richard H McCorkle wrote:
Time-Nuts,
There has been much discussion on this list about methods
of measuring short-term stability. I wanted to make the
list aware of a new paper describing a small DMTD system.
The system
On 5 June 2010 22:06, Steve Rooke sar10...@gmail.com wrote:
On 5 June 2010 19:07, Bruce Griffiths bruce.griffi...@xtra.co.nz wrote:
Wrong again.
No, I'm not wrong Bruce.
The integration/averaging referred to occurs when one counts the output
transitions of the VFC for a fixed time interval.
On 06/03/2010 02:15 PM, Ulrich Bangert wrote:
Gentlemen,
the discussion between Bruce and Warren concerning Warren's implementation
of NIST's Tight PLL Method has caused quite a stir in our group.
My scientifical knowledge about the discussed topic is so much inferior
compared to Bruce's one
On Saturday 05 June 2010 11:29:03 John Miles wrote:
I'm interested in tracking down a copy of Walls's Cross-Correlation Phase
Noise Measurements from the 1992 IEEE Frequency Control Symposium
proceedings, but apparently the IEEE's no longer offering their traditional
$10 a la carte downloads.
So, at best, it's an estimate.
Steve
On 5 June 2010 23:07, Magnus Danielson mag...@rubidium.dyndns.org wrote:
On 06/03/2010 02:15 PM, Ulrich Bangert wrote:
Gentlemen,
the discussion between Bruce and Warren concerning Warren's implementation
of NIST's Tight PLL Method has caused quite a
You didn't have to read it all, no one forced you and in terms of
physical bandwidth, I would not expect anyone to seriously read any
group list on a cellphone, let alone one connected at less than 3G
speeds.
Nice poem BTW, I must read more of him.
Steve
On 5 June 2010 09:30, Arthur Dent
On 06/05/2010 01:19 PM, Steve Rooke wrote:
So, at best, it's an estimate.
Yes.
How good it is, how fast you get it, how much you pay for it and how
much effort it is to get and operate is the issue.
Getting accurate measurements is hard to prove actually. Getting
sufficiently good
Morning, folks.
After much consideration I've decided that I really do need that
accurate 1PPS and 10MHz source.
Seller flyingbest on eBay is offering those Tbolt/PSU/AA packages
for a princely $189.
Any gotchas or reasons to not get one of these?
TIA,
Lee.
Magnus Danielson wrote:
Also, modern cheap programmable TCXOs break the model as they have a
hump in the phase noise due to their locked PLL, which the original
model does not allow for. The autocorrelation function will be quite
different. Notice how this ripples over to other locked
I have dealt with flyingbest on and off eBay with no problems on TBolts.
PSU is nice and net but I am sure that the timenuts will frown on switch mode
PS.
Morning, folks.
After much consideration I've decided that I really do need that accurate 1PPS
and 10MHz source.
Seller flyingbest on
In a message dated 05/06/2010 13:47:02 GMT Daylight Time, kd...@spamcop.net
writes:
Seller flyingbest on eBay is offering those Tbolt/PSU/AA packages
for a princely $189.
Any gotchas or reasons to not get one of these?
--
In general terms the Thunderbolt is a great unit and
In message 90f3b.769add12.393ba...@aol.com, gandal...@aol.com writes:
Another Chinese seller worth considering is Bob Mokia who sells on Ebay as
fluke.l,
Speaking of which: Has anybody tried the GPS/Glonass receivers he has for
sale ?
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
I've noticed a U.S. seller on Ebay with 100% positive feedback selling a
Thunderbolt package deal that isn't too pricey, actually quite a bit less
than the one you mention. Apparently they have several and have been
listing them over the last few weeks. the latest item (120576511516)
ends in a
I just received a Thunderbolt from fluke.L to
replace the TAPR Thunderbolt I have that fails.
I paid fluke.L on May 19 and it arrived in
Michigan, USA on June 3.
I'm in my second day of testing with the fluke.L
Thunderbolt and it is working fine so far.
In January I bought the Thunderbolt
I am not sure what item you are looking at but I lost a TBolt while
connected to a switching power supply (I live in an area with frequent
intermittent power outages) so I prefer a linear power supply (another TBolt
running on a linear power supply for days/weeks on end with no further
problems).
Did you send the failed Tbolt back to tvb? ISTR that he expressed an interest
in getting failed TAPR units back so that
he could investigate why they failed.
Dave
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Mike Naruta AA8K
Further to earlier comments I have now traced the full schematic of the
8051 replacement processor board in the iCruze display.
The schematic is so close to Didier's original that I don't think it's
necessary to provide a copy but could do so if required.
Differences are described below
gandal...@aol.com wrote:
3...The series input and base to ground resistors on the RS232 interface
are both 180 ohms, rather than 10K and 3K3 respectively as in Didier's
circuit.
If one wanted to use the RS232 interface to a computer at the same time
as the ko4bb monitor in parallel,
Hi all,
I would like to know which could be the cheapest clock (possibly not
wristwatch) that would display UTC time. It seems that DCF77 clocks
either display CET/CEST and/or other timezone but I was unable to locate
a UTC display so far.
This is the closest match I found, sadly it does not
Hi,
Do you mean something like this?
http://www.conrad-international.com/websale7/?shopid=conrad-intact=productprod_number=671628
They sell several radio controlled clocks. Most of these clocks can
display UTC.
Harry
On Sat, 05 Jun 2010 17:27:05 +0200, Giuseppe Marullo giuse...@marullo.it
I have no problem with strong points of view, in some ways it increases my
enthusiasm for the topic. The medium of email does have it's limits, but why
censor or ignore the discussion if it includes these indications of a strong
belief in ones view ? We have many dry papers to read please
I have a couple of TBOLTs as well as a Z3801. If it were me, I would spend
the extra and get a Z3801 or something similar. There is a Z3805 on eBay
right now for $199. I didn't notice if it was an auction or buy it now.
Z3801s seem to vary widely in price. I have seen them for under $200 but
right
Important to add the shipping I saw the $199 but it had $100 for shipping,
total $299
One unit I saw had a connector to plug the unit into a card rack, without the
card rack it was not clear how much modification would be needed to run it
stand alone.
Stanley
- Original Message
Hi Poul-Henning,
Another Chinese seller worth considering is Bob Mokia who sells on Ebay
as fluke.l,
Speaking of which: Has anybody tried the GPS/Glonass receivers he has for
sale ?
Did you find any manuals for the Samsung receiver? The receiver would be
interesting to test, but with NO
Hi
The TBolt needs a supply that will put out about an amp at +12, just over 1/4
amp at +5 and a few ma at -12. Regulating the +5 down from the +12 isn't to
hard with a 7805 and a series resistor. That gets you to +/-12 for the supply.
Switchers do indeed work, linear supplies are often a bit
Hi
For around $300 (plus shipping) you can get a Z3805. They seem to do at least
as well as the 3801. The 3805 is slightly easier to get running since it's
usually RS-232 without any conversion.
Bob
On Jun 5, 2010, at 12:54 PM, Stanley Reynolds wrote:
Important to add the shipping I saw the
Harry,
thanks for your answer. I tried to look at the instructions, but I am
unable to tell for certain if it can display UTC.
I mean, there is a mention about foreign time, but everything else is
about no need to manually setup Winter/Summer time, exactly what I would
like to avoid.
How
After about mid 2004 the DS1620 thermometer chip was the E
version that displays the temperature in steps of maybe 1 degree.
I've replaced a few of these chips with C versions that correct the
graphing problem and make the T-bolts work properly. Unless you
want to find and replace the surface
DCF77 is transmitted in CET/CEST and so receivers generally just
display the received data with some allowing other TZ offsets as it can
be received in the UK for example. I also lucked out when looking for
one where daylight savings adjustments could be removed .
Le 05/06/2010 23:37,
Many thanks - I ended up with a couple of copies. :)
-- johh, KE5FX
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com]on
Behalf Of Florian Teply
Sent: Saturday, June 05, 2010 4:18 AM
To: time-nuts@febo.com
Subject: Re: [time-nuts] Looking for an
Having essentially no experience in SMD work, what diodes did you use?
Thanks,
Joe
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of erniepe...@aol.com
Sent: Friday, June 04, 2010 5:42 AM
To: time-nuts@febo.com
Subject: Re: [time-nuts]
Steve Rooke wrote:
On 5 June 2010 19:07, Bruce Griffithsbruce.griffi...@xtra.co.nz wrote:
Wrong again.
No, I'm not wrong Bruce.
Your contribution is largely irrelevant to the original discussion.
The effect of the PLL itself is (or should be) well understood.
However various
In a message dated 05/06/2010 23:28:26 GMT Daylight Time, jlt...@att.net
writes:
Having essentially no experience in SMD work, what diodes did you use?
Hi Joe
There's enough room to fit standard wire ended 1N4148s, as per Didier's
original circuit, if you bend the wires carefully so
On 05/06/2010, gandal...@aol.com gandal...@aol.com wrote:
There's enough room to fit standard wire ended 1N4148s, as per Didier's
original circuit, if you bend the wires carefully so no ned to source SMD
parts unless you really want to.
That said, if anyone (UK / Europe) wants them, I
Thanks.
Allied has them, SMD, $3.00 per 100. Should be a lifetime supply for me.
And you're right, 100K is insane.
And my wife thought I was a packrat. :)
Thanks again.
Joe
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Steve
In a message dated 05/06/2010 16:18:06 GMT Daylight Time,
dan...@verizon.net writes:
3...The series input and base to ground resistors on the RS232 interface
are both 180 ohms, rather than 10K and 3K3 respectively as in Didier's
circuit.
If one wanted to use the RS232
DCF77 is transmitted in CET/CEST and so receivers generally just
display the received data with some allowing other TZ offsets as it can
be received in the UK for example. I also lucked out when looking for
one where daylight savings adjustments could be removed .
Mike,
exactly what I am
Giuseppe,
I know this might get me hung, drawn and quartered
:-) , but is your need really just for a radio synchronized clock
that shows UTC for use in the shack?
If it is, why not purchase an *analog* DCF77 synchronized clock, set
it to local radio time and then just move
Joe,
Thank you for your inputs! The Z3815A I suspect is low voltage, it has a large PC card/motherboard type of connector
with a large molex/amphenol power connector. There appears to be a pair of DC-DC modules inside. You would need to
make some internal taps to get the 10MHz out to a BNC.
Hi
The 1938 and 10811 share the same basic crystal. The difference between a very
good and a acceptable crystal can be an order of magnitude or more on ADEV
at tau = 1 second. In a very stable environment the rare 10811 with the
5x10^-13 at 1 second crystal will beat most of the production
Robert Benward wrote:
Joe,
Thank you for your inputs! The Z3815A I suspect is low voltage
If and only if a ~24-48V supply is considered low voltage.
The 10MHz outputs level is only around +4dBm though there are 4 10MHz
outputs.
, it has a large PC card/motherboard type of connector with a
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