ht one about a year ago but couldn't get it running under Win XP.
>> There were a dozen well-meant advices on the forums that told me to read
>> the firmware and flash the beast with a "better" one. However, I
>> couldn't keep my nerve, so I purchased a Prologix
hash=item3cd4efb089
or
http://tinyurl.com/qbsjjmr
Has anyone here tried this? In particular, can it be made to work under Linux?
I have the Prologix unit which works great with simple PERL scripts under Linux,
but always looking for a bargain!
Thanks,
--
Bob Smither,
to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
>
>
Here is another one:
http://www.strikestarus.com/
--
Bob Smither, Ph.D. - Linux User 281-331-2744; fax:-4616 smit...@c-c-i.com
=
Search for "17,000 ufd." Sprague 17,000 ufd at
20 Volts, CD 17,000 ufd at 30 Volts, etc.
--
Bob Smither, PhD Circuit Concepts, Inc.
=
No man's life, liberty, or property are
you all the information you need
to track the satellites in real time."
--
Bob Smither, PhD Circuit Concepts, Inc.
=
Top 10 reasons why those that love the United States should not
nnealing some metal springs for a project.
I have no relationship with Vulcan other than being a satisfied customer.
--
=
Bob Smither, PhD Circuit Concepts, Inc.
"Every election
On 12/06/2012 08:04 AM, Jim Lux wrote:
> On 12/6/12 4:42 AM, Bob Smither wrote:
>> On 12/05/2012 02:32 PM, M. Simon wrote:
>>> Do you have a link for the nifty site?
>>
>> This one is not just for the west coast, but has good reporting of grid
>> conditions
ple Events tab has links to movies of the grid frequency during major
storms and an east coast earthquake.
--
Bob Smither, Ph.D. smit...@c-c-i.com
<>___
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To unsubscribe, go
Anyone notice this?:
https://isc.sans.edu/diary.html?n&storyid=14548
Seems a Navy NTP server claimed it was year 2000 for a while.
<>___
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On 11/14/2012 10:56 AM, Bob Smither wrote:
> Do Rb oscillators wear out? I have found:
Thanks for all the good information! I am running my FE-5680a 24/7, and, as
suggested, have a couple of backups. At my age I should be set for life!
One last question: what category of lamps do
uvenating Rb oscillators on this list, so I
suspect Clint is correct.
Whose right? As a time-nut, do you leave your Rb oscillators on 24/7?
Thanks,
--
Bob Smither, PhD Circuit Concepts, Inc.
Has anyone tried the fluorescent replacement LED tubes? Apparently you remove
the ballast from the fixture and power the tube from the 120V AC line.
Any chance these would reduce the noise in a lab from conventional fluorescent
tubes?
Thanks.
<>___
time
t be redundant for time nuts! I have an NTP client on my Android and it
shows the network time (Sprint in my case) is often as much as 2 seconds behind
UTC.
Anyone else noticed this?
Best regards,
--
==========
On 09/03/2012 12:00 PM, Graham / KE9H wrote:
> On 9/1/2012 1:35 AM, Hal Murray wrote:
>> The context is using the 60 Hz line for timing.
>>
>> I'm feeding 60 Hz from a wall wart transformer into a modem control signal
>> that the kernel PPS stuff watches. Mostly, it works as expected, but
>> occas
ing a 50 ohm line the initial edge from the gate is
about 4V - which implies a Zo of about 13 ohms. A 50 ohm buffer with 4 gates
would therefore use 187 ohms series resistors.
There is an app note attached here that discusses this:
http://c-c-i.com/node/107
--
On 04/17/2012 06:38 AM, Robert Atkinson wrote:
> I quite like the HP 546xx series 'scopes. An "analog like" interface but good
> DSO facilities. My regular 'scope at home is a 54645D mixed signal. Ideal for
> lower speed logic/anlog circuits and 8 bit PICs. Takes up a lot less space
> than a 16500x
Fellow Nutters,
A friend of mine (not on this list) wants to revive his interest in ham radio.
He lives in Friendswood, Texas (zip: 77546).
If you would be willing to help him get re-started in the hobby, please reply to
me off list and I will get you together with him.
Thanks!
--
Bob Smither
WarrenS wrote:
> Bob
>
> Worked great for my long zip file, and a large. jpg
> Thanks very easy to use, this will be very helpful to me.
> still a little problem, It would NOT take my short .gif file unless I
> falsely renamed it with a .jpg extension
Thanks Warren! Should be
missing something?
Thanks,
--
=========
Bob Smither, PhD Circuit Concepts, Inc.
America - born free, taxed to death ...
smit...@c-c-i.com http://www.C-C-I.Com
Bob Smither wrote:
> After some changes, I was able to upload a 30 MB file with no problem. I will
> try a larger one later today.
I just uploaded a 119 MB file - so the exchange page
http://www.c-c-i.com/exchange/
seems to be working.
--
Bob Smither
able to upload a 30 MB file with no problem. I will
try a larger one later today.
Hopefully it is working again.
Sorry for the false start.
--
Bob Smither, PhD Circuit Concepts, Inc.
What
and tgz, among others,
>> are supported.
>>
>> I would ask that after you have made a file available for a reasonable
>> time that you go to the page and delete it. If you only want to make
>> the file available to one person, ask them to delete it after they
>> do
ey download it.
If a file remains there more than a few weeks I may delete it.
Best regards,
--
Bob Smither, PhD Circuit Concepts, Inc.
=
"If you want peace, work
Bob Smither wrote:
> Thanks Rob Kimberley!
And now thanks to fellow time-nut Louie Mamakos there is a copy that is search
able. Here is how he did it:
"Just for grins, I ran your PDF file through Adobe Acrobat to OCR it (and
clean it up slightly). The image is still there, but the OC
Thanks Rob Kimberley!
The manual that Rob found (Technical Manual TM 5680-0211) is available here:
http://c-c-i.com/node/166
Best regards,
--
Bob Smither, PhD Circuit Concepts, Inc
url
tf.nist.gov redirects to: http://www.nist.gov/pml/div688/
Maybe that one will work?
--
Bob Smither, PhD Circuit Concepts, Inc.
=
Blessed is he who expects no gratitude, for he shall no
heater."
See also http://c-c-i.com/node/165 for an application note that has a pretty
good discussion of this.
--
Bob Smither, PhD Circuit Concepts, Inc.
=
Friendly r
J. L. Trantham wrote:
> Bob,
>
> You (and others) make a good point. The stability of a good Rb may be such
> that, in a portable operation, if you are going to be there for less than 2
> weeks, why bother with the GPSDRbO option. Turn it on, adjust it to your
> GPSDO at home, turn it off, take
Bob Smither wrote:
> I have noticed the the 1pps pulse goes away when I make a large change to the
> offset count through the RS232 connection. The pulse comes back after the
> unit
> has settled for a while.
More observations. My unit is S/N 0316 61953, UN 63983. If I try t
Bob Smither wrote:
> Joseph Gray wrote:
>> I'm not seeing a PPS on either of these. All I see is about 17 mV P-P
>> of noise that looks like a multi-stepped sine wave. I'm using a TDS
>> 340 scope.
>
> I can see the 1 usec, 1pps on mine, but only if I use a
Joseph Gray wrote:
> I'm not seeing a PPS on either of these. All I see is about 17 mV P-P
> of noise that looks like a multi-stepped sine wave. I'm using a TDS
> 340 scope.
I can see the 1 usec, 1pps on mine, but only if I use an analog storage scope.
Although my HP54000 series scope triggers at
case temperature should be I am hesitant to try this. Maybe if I
get a spare ...
--
Bob Smither, PhD Circuit Concepts, Inc.
=
"The world is a dangerous place, not because of those who d
fe5680 rest on a small
> aluminum plate.
Have you measured the case temperature of your FE5680?
I put mine on a heat sink and the case temperature stays around 50C. Without
the heat sink it was around 60C. Does anyone know what temperature is
recommended? The 50C seems
N 2: GROUND
PIN 3: LOCK/UNLOCK (high = unlock)
PIN 4: INPUT +5V
PIN 5: GROUND
PIN 7: OUTPUT ( 10MHz sinewave )
Pin 6 has a (weak) 1pps. Pins 8 and 9 are for the RS232 interface.
- --
Bob Smither, PhD Circuit Concepts,
ld be accurate to sub nsec. Of course, the FE-5680A could be used
as the counter timebase :-).
On 12/28/2011 10:45 AM, Bob Smither wrote:
Chris Albertson wrote:
Just got my fe5680 yesterday. Seems to work but the fe5680 is the most
accurate reference I have. So how to test it? I plan to
http://c-c-i.com/image/tid/4
Most recent:
http://c-c-i.com/node/159
Hope this helps.
--
========
Bob Smither, PhD Circuit Concepts, Inc.
"Patriotism is supporting your country all the
Chris Albertson wrote:
On Thu, Dec 15, 2011 at 11:05 AM, Chuck Forsberg WA7KGX N2469R
wrote:
1. Will it work on 12 volts instead of 15?
My bet is "no" as there is an internal regulator that likely needs headroom
2. Is the serial i/o really RS-232 or something else
There is a Max rs232 lev
Tom Curlee wrote:
Check the Scientific American Amateur Scientist index for clocks here:
http://amasci.com/amateur/sciamdx.html#52-CC It looks like the September
1974 issue has the article on using discrete cmos logic to synchronize a
pendulum clock to a quartz crystal.
The article is here:
//cutecom.sourceforge.net/
--
=========
Bob Smither, PhD Circuit Concepts, Inc.
The purpose of government is to rein in the rights of the people.
-- Bill Clinton, President of the United States
smit...@c-c-i.comhttp://www.C-C-I.Co
alex mclaggan wrote:
Like many of you, I have seen these advertised on Ebay at good prices.
Also, like many of you, I am confused about the 'programmability' and
connections.
Many of them advertise these connections:-
PIN 1: INPUT +15V to +18V
PIN 2: GROUND
PIN 3: LOCK/UNLOCK (high = unlock)
Bob Camp wrote:
Hi
If you dig into the circuit, the resolution of the DDS is indeed 7x10^-13 per
LSB.
Bob
Thanks for the confirmation.
On Dec 9, 2011, at 9:51 PM, Bob Smither wrote:
Bob Smither wrote:
My documentation states that the full range of adjustment is:
7f ff ff ff
Bob Smither wrote:
My documentation states that the full range of adjustment is:
7f ff ff ff => +383 Hz
80 00 00 00 => -383 Hz
This scale factor is clearly wrong - using it and applying an appropriate
correction changes the frequency way too much.
From:
http://article.gma
Bob Smither wrote:
Chuck Forsberg WA7KGX N2469R wrote:
The price seems reasonable, esp. with free shipping.
Does anyone have experience with these?
Is the circuit board included?
I could not resist at < $40.00 delivered. Mine has been running for a
couple of weeks, but my measurements h
.
--
=
Bob Smither, PhD Circuit Concepts, Inc.
I've come to realize that protecting freedom of choice in our everyday
lives is essential to maintaining a healthy civil society.
-- George McGovern
smit...@c-c-i.comhttp://www.C-C-
regards,
--
=========
Bob Smither, PhD Circuit Concepts, Inc.
America - born free, taxed to death ...
smit...@c-c-i.com http://www.C-C-I.Com 281-331-274
, and therefor the signal out of the Ref Tek has
the stated jitter. Of course, for the application intended, 2 usec of jitter is
not significant.
I am using this 1 PPS to monitor a precise crystal oscillator, but I have to do
some serious averaging.
--
Bob Smither, PhD
John Miles wrote:
-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
Hi List,
Does anyone have experience with this GPIB to RS-232 converter:
http://www.webalice.it/hotwater/PicPlot.htm
Thanks,
--
Bob Smither, PhD Circuit Concepts, Inc.
=
If you
Ulrich Bangert wrote:
Fellow time nuts,
does anyone of you have available the specs of one of the the following
transistors?
1) PT5744
2) ENI5744
3) TRW201
Is this what you need:
http://www.electronicsurplus.com/item/131847/
I could not find any specs.
Hope this helps.
<>___
Dave M wrote:
You can download a searchable manual for your 5370B from
http://www.ko4bb.com/cgi-bin/manuals.pl?dir=HP_Agilent.
It's a rather large download, but it's a good scan with searchable text.
David
Excellent - thanks David.
<>___
time-nu
r the 5370 are not hard to find. From a service manual I found:
3-22. Error messages
Error 2 - Data out of range (overrange).
I have a service manual, but could not find the errors listing in it (it
is a scan, not searchable).
Thanks to all who identified the error for me.
--
Bob Sm
, but then show the error
message. A Reset returns it to normal operaion.
I could not find a list of the error codes in the manuals that I have.
Does anyone know what my 5370B is trying to tell me?
Thanks!
--
Bob Smither, Ph.D. - Linux User 281-331-2744; fax:-4616 smit...
agination and
pablum. http://arxiv.org/abs/1110.2685
and the original one in a more readable form:
http://dvice.com/archives/2011/10/speedy-neutrino.php
--
Bob Smither, PhD Circuit Conc
. See:
http://en.wikipedia.org/wiki/Private_network
--
Bob Smither, Ph.D. smit...@c-c-i.com
==
"The most potent weapon of the oppressor is the mind of the
oppr
orting out one of the counter bits with a
screwdriver or clip lead for a fraction of a second.)
:-). I actually have a SPDT switch that I can move one of the
counter decode taps with and slew the edge with some control.
Thanks!
--
Bob Smither, PhD
avior I observed is
in fact normal and my 5370B is OK?
Best regards,
--
===========
Bob Smither, PhDb...@smither.
uot;inside" (or short time interval)
between the pulse pair.
Is this normal behavior? Is there a setup that I am missing to make it
do what I want?
Thanks for any insight you might give me!
Best regards,
--
Bob Smither, Ph.D.
I put Paul's document (as a PDF) here:
http://c-c-i.com/node/152
Enjoy!
--
=======
Bob Smither, Ph.D.smit...@c-c-i.com
"No freeman shall be debarred the use of arms"
--Thomas
ing capability is limited. Within the precision (~10E-8) that
I have I could not see any difference in the oscillator frequency.
Thanks,
Bob Smither
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To unsubscribe, go to https://www.febo.com/cgi
g the vacuum tube half. The other part of the
instrument, in a separate compartment, has a precision 40 step
attenuator with a 10^6 / 1 range (300 Volts to 300 uVolts) which I will
certainly keep.
Best regards,
--
=====
Bob Smither,
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