Didier,
Its subjective then. If its bad enough you take the risk because you do know
the process will degrade the scale. Essentially when its time to do it you
will.
So the good news is this. With todays tools you can very accurately
reproduce the meter scale. I scan them at 1200 dpi as I just did
Boy do I agree with that.
If Diddier is reading this, wonder if we could add a meter scale to your
fine manual repository?
Regards
On Tue, Oct 12, 2010 at 12:38 AM, Rex r...@sonic.net wrote:
The ability to easily do this kind of graphics stuff (scanning and
printing) at an affordable price is
Just a quick note...
HP was quite proud that scales for their precision meters were individually
produced
for each movement on a custom made servo controlled photographic calibrator.
An archive might be nice but won't provide the meter accuracy of the originals
produced
for each
Hi Jerry:
Is there an HP Journal or other article that goes into detail on how
they did that?
Have Fun,
Brooke Clarke
http://www.PRC68.com
gsteinb...@aol.com wrote:
Just a quick note...
HP was quite proud that scales for their precision meters were individually
produced
for
On 10/12/2010 8:11 AM, gsteinb...@aol.com wrote:
Just a quick note...
HP was quite proud that scales for their precision meters were individually
produced
for each movement on a custom made servo controlled photographic calibrator.
An archive might be nice but won't provide the
Jerry thanks and completely understand. But then again a meter with 50% of
its scale missing isn't all that useful either. Its all relative.
On Tue, Oct 12, 2010 at 11:11 AM, gsteinb...@aol.com wrote:
Just a quick note...
HP was quite proud that scales for their precision meters were
Said,
Are those using the u-blox receivers? (I don't know of any other company with a
50 channel receiver.) If so, what's your overall
opinion of them?
Jason
one more product line: all of our Jackson Labs Technologies, Inc.
FireFly-1A and FireFly-IIA based GPSDO Timing products use WAAS by
I read 'Vector Voltmeter' and assumed HP 8405A.
Jerry
-Original Message-
From: Richard (Rick) Karlquist lt;rich...@karlquist.comgt;
To: Discussion of precise time and frequency measurement
lt;time-nuts@febo.comgt;
Cc: gsteinb...@aol.com
Sent: Tue, Oct 12, 2010 8:52 am
Subject: Re:
It seems to me,
There was a program or two that someone (or more) had written to do meter
scaling. It was designed to print properly on an hp laserjet as I recall.
At the moment am unable to find it in my list of links or programs on my
computer. But Google should give some answers.
It seems to me,
There was a program or two that someone (or more) had written to do meter
scaling. It was designed to print properly on an hp laserjet as I recall.
At the moment am unable to find it in my list of links or programs on my
computer. But Google should give some answers.
Yeah, I remember from the good old days, we individually calibrated
taut-band meter movements with a HP designed servo-meter calibrator. At
least that's the way we did it for some models. I don't guarantee we did it
that way for all models, though.
The way I remember it, this process
OK, found it
http://tonnesoftware.com/meter2.html
BillWB6BNQ
WB6BNQ wrote:
It seems to me,
There was a program or two that someone (or more) had written to do meter
scaling. It was designed to print properly on an hp laserjet as I recall.
At the moment am unable to find it in my
OK, found it
http://tonnesoftware.com/meter2.html
BillWB6BNQ
WB6BNQ wrote:
It seems to me,
There was a program or two that someone (or more) had written to do meter
scaling. It was designed to print properly on an hp laserjet as I recall.
At the moment am unable to find it in my
P.S. There's a better description (in an article by Bernie Oliver) at:
http://www.hpl.hp.com/hpjournal/pdfs/IssuePDFs/1961-03.pdf
Greg
- Original Message -
From: Greg Burnett gb...@comcast.net
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Sent: Tuesday,
Thanks, except I remember he went by Barney or Barnie.
-John
=
P.S. There's a better description (in an article by Bernie Oliver) at:
http://www.hpl.hp.com/hpjournal/pdfs/IssuePDFs/1961-03.pdf
Greg
- Original Message -
From: Greg Burnett gb...@comcast.net
To:
OK, found it
There is one version but two choices. The first is a FREE one with limited
capability. The second is the same program but with a key to unlock all the
color and variable adjustment capabilities of the program. The WEB page shows
a number of examples at the bottom.
You're correct, John.
Bio on Barney Oliver at:
http://www.hp.com/retiree/history/founders/early_contributors/barney.html
Greg
- Original Message -
From: J. Forster j...@quik.com
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Sent: Tuesday, October 12,
On 10/12/10 09:27 PM, WB6BNQ wrote:
OK, found it
There is one version but two choices. The first is a FREE one with limited
capability. The second is the same program but with a key to unlock all the
color and variable adjustment capabilities of the program. The WEB page shows
a number of
Sure Brooke,? it's a fun read.
? http://www.hpl.hp.com/hpjournal/pdfs/IssuePDFs/1961-03.pdf
Best,
Jerry
Message: 2
Date: Tue, 12 Oct 2010 08:26:34 -0700
From: Brooke Clarke lt;brooke95...@att.netgt;
Subject: Re: [time-nuts] Subject: Re: Meter face for HP-4805A
To: Discussion of
Hi,
I have a Flex-3000 receiver, running freely on its internal TCXO (0.1
ppm). I have been recording the reported deviations in the
measurements of the 100 Hz sizeband of 10 MHz WWV all day long. I do
this in AM detection mode, to remove any variations due to the wander
in the radio LO.
Hi
Best guess is that the codec in the Flex runs on the same TCXO as the rest of
the radio.
Bob
On Oct 12, 2010, at 7:48 PM, David McClain wrote:
Hi,
I have a Flex-3000 receiver, running freely on its internal TCXO (0.1 ppm). I
have been recording the reported deviations in the
Best guess is that the codec in the Flex runs on the same TCXO as
the rest of the radio.
That's my best guess too... so how is it that I'm seeing 25x less
variation in the audio signal than the TCXO is capable of yielding?
I have the central air conditioner cycling on and off all day
Okay, perhaps I should rephrase the question... Is is reasonable to
expect a TCXO to perform at 4e-9 over the FFT window period of about
87 sec? I can only imagine that the enormous (87 s) averaging period
is making my measurements look so good.
Dr. David McClain
Chief Technical Officer
Hi
Yes it is a reasonable expectation as long as you don't have a lot of drafts. A
good TCXO can get down to sub 0.1 ppb over that period.
Bob
On Oct 12, 2010, at 8:21 PM, David McClain wrote:
Okay, perhaps I should rephrase the question... Is is reasonable to expect a
TCXO to perform at
Hi Bob and Dave,
On 10/13/2010 02:57 AM, Bob Camp wrote:
Hi
Yes it is a reasonable expectation as long as you don't have a lot of drafts. A
good TCXO can get down to sub 0.1 ppb over that period.
This is why I like ADEV plots in datasheets. I rarely get to see them.
TDEV plots is a nice
Ahh.. so... Now since my TCXO is drifting to and fro by 1-2 Hz over
the period of 45 minutes, why don't I see similar drift in the 100 Hz
audio signal, down around 5 mHz amplitude?
This happens to be about the same size at the FFT bins. So I am led
to conclude that interpolated peak
Ok, you beat me to it, thanks!
Didier
Sent from my Verizon Wireless BlackBerry
-Original Message-
From: WB6BNQ wb6...@cox.net
Sender: time-nuts-boun...@febo.com
Date: Tue, 12 Oct 2010 13:11:46
To: Discussion of precise time and frequency measurementtime-nuts@febo.com
Reply-To:
1 Hz in 10Mhz is about the same ratio as 5mHz in 64Khz.
This would make sense if the Clock for the A/D is divided off the same
TXCO.
Or am I missing something.
The reason I jumped in, in a recent frequency measuring contest the
winner was using that interpolation for his results.
Regards
Hi,
No you aren't missing anything... except that I *DON'T* see the 5 mHz
drift that one should expect. Hence my contention that relying on
interpolated frequencies from FFT peaks and their adjacent bins is
bogus when the FFT bin size is as large or larger than the expected
drift.
Hi Jason,
yes, we use uBlox among others. We have a very high opinion of these in
mobile applications.
We add dynamic GPS filter parameter configuration in our software, the
units with default configuration are not really usable in mobile applications
above walking speed. We did numerous
Of course, that's the whole point of the web site :)
Didier
Sent from my Verizon Wireless BlackBerry
-Original Message-
From: paul swed paulsw...@gmail.com
Sender: time-nuts-boun...@febo.com
Date: Tue, 12 Oct 2010 09:31:05
To: Discussion of precise time and frequency
Good point, but still a whole lot better than a blank face with paint chips at
the bottom :)
Didier
Sent from my Verizon Wireless BlackBerry
-Original Message-
From: gsteinb...@aol.com
Sender: time-nuts-boun...@febo.com
Date: Tue, 12 Oct 2010 11:11:09
To: time-nuts@febo.com
Reply-To:
Well, I suffer not only from dislexia, but also blurred vision. It's a 4800A
The meters look the same as the 4805A though.
To my defense, my cardiologist told me last week that my good cholesterol was
too low and he recommended that I drink a glass of red wire with dinner every
day to raise it
Hi, I scanned this scale from my HP3406a whose scale had started peeling away.
I repaired by scaping away the loose paint and the spaying the scale with clear
acylic.
The mirror backscale is not as clear as it used to be, but it still useful.
I hope this helps
73 Gary VK2KYP
The information
Just curious, if you have set your radio to AM mode to remove any variations
due
to wonder in the radio LO, how would any minor deviations in the TCXO of the
radio affect the measurement ? If you are looking at the difference between a
10.00 mhz carrier and a 10.000100 mhz sub carrier
On Oct 12, 2010, at 6:09 PM, Magnus Danielson mag...@rubidium.dyndns.org
wrote:
Hi Bob and Dave,
On 10/13/2010 02:57 AM, Bob Camp wrote:
Hi
Yes it is a reasonable expectation as long as you don't have a lot of
drafts. A good TCXO can get down to sub 0.1 ppb over that period.
This
Yes, indeed. I demodulate in AM mode, specifically to remove any
sensitivity to the LO wandering with ambient temperature.
And no I wasn't seeing any variation bigger than 4 ppb with a 0.1 ppm
TCXO wander. That's what the quandary was all about.
I think I have answered the question... You
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