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I suggest you use a CMOS multiplexer driven by a clock and a flip-flop (to
guarantee 50% duty cycle) to switch the Weston cell's output voltage on and
off at 50% ratio. Knowing the ON resistance of the CMOS multiplexer will
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Hi,
Excuse the topic but is does push the same buttons as it were.
After calibrating my old HP54502A 6-bit digitizing scope I'm left
with an error I can't quite believe and so am trying to determine
which of my instruments is
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The results of the first MVUS Frequency Measuring Test are now available
at http://www.febo.com/pages/mvus-fmt/index.html (click on October 2007
Results). There are also pages at that URL describing how we generated
and
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Joe McElvenney wrote:
Hi,
Excuse the topic but is does push the same buttons as it were.
After calibrating my old HP54502A 6-bit digitizing scope I'm left
with an error I can't quite believe and so am trying to determine
Hi Tom,
I have a few ONCORE docs but need the correct P/N in order to determine the
type of your board
Question for what purpose do you like to use it?
Best regards,
Ernie.
-Original Message-
From: Tom Clifton [EMAIL PROTECTED]
To: time-nuts@febo.com
Sent:
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Hi Tom
I have WinOncore12 and will send you a copy direct.
Easily may not be the best description as it defaults to not displaying
data after a test, and some other commands, but should be basically ok.
TAC32 is much
I just received an older 8 channel Oncore GPS board -
still not sure if it is a timing or navigation part...
In any event, I have found plenty of documentation on
it, but so far none of the links for the Motorola eval
software WinOncore (presumably free) seem to be
functional. Can someone help me
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On Tue, 06 Nov 2007 11:57:27 +, Joe McElvenney [EMAIL PROTECTED] wrote:
Anyone know of a simple way of producing an AC voltage standard
suitable for general workshop use without reference to another
one? About one percent
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Tom,
WinOncore12 software is available directly from our website:
http://www.synergy-gps.com/content/view/33/90/
Regards,
Art Sepin
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of
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Bill,
OOOPs,
Yes it was a typo!
5VDC and 5 ohm 10Watt is correct.
Thanks for correcting me, I hope everone will see the correction!
Best Regards,
Corby
___
time-nuts mailing
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Hi John:
How does it compare to the Linear LTZ1000?
Have Fun,
Brooke Clarke
http://www.PRC68.com
http://www.precisionclock.com
http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Cam
Neon John wrote:
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To All,
Let me repeat what John De Armond stated. It is most important.
A standard cell, whether saturated or unsaturated, cannot be loaded under any
circumstances. Any current draw will upset the cell chemistry and cause
The problem with a mercury relay is that the switching delay is significant and
not well controlled, so the duty cycle of the resulting waveform is not well
controlled, and so would be the RMS value.
I believe CMOS analog switches would provide better control, and with series
resistance that
Didier Juges wrote:
The problem with a mercury relay is that the switching delay is significant
and not well controlled, so the duty cycle of the resulting waveform is not
well controlled, and so would be the RMS value.
I believe CMOS analog switches would provide better control, and with
Didier Juges wrote:
The problem with a mercury relay is that the switching delay is significant
and not well controlled, so the duty cycle of the resulting waveform is not
well controlled, and so would be the RMS value.
I believe CMOS analog switches would provide better control, and with
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Anyone know of a simple way of producing an AC voltage standard
suitable for general workshop use without reference to another one?
About one percent would be good enough, wave shape and frequency
accuracy not important
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On Tue, 6 Nov 2007 13:52:13 -0500, Didier Juges [EMAIL PROTECTED] wrote:
The problem with a mercury relay is that the switching delay is significant
and not well controlled, so the duty cycle of the resulting waveform is not
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I thought the question was:
Anyone know of a simple way of producing an AC voltage standard
suitable for general workshop use without reference to another
one? About one percent would be good enough, wave shape and
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Date: Sun, 04 Nov 2007 10:24:59 -0500
From: xaos [EMAIL PROTECTED]
Subject: Re: [time-nuts] Fury Interface Board: 5MHz needed?
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Message-ID:
Nice catch, John.
A solution provider would do well to understand the problem before
presenting the solution. The first paragraph of this morning's 5:52
AM (UTC-6) posting outlined the problem. A 1% solution will satisfy
a 6 bit calibration.
The reading is likely to be Average, not RMS, so the
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On Tue, 6 Nov 2007 17:41:21 -0500, Didier Juges [EMAIL PROTECTED] wrote:
There was no reference to a 6 bit scope.
First paragraph of the original post:
Joe McElvenney wrote:
Hi,
Excuse the topic but is does push the
In a message dated 11/6/2007 16:29:16 Pacific Standard Time,
[EMAIL PROTECTED] writes:
George for a single ground pin OXCO you might want to consider compensating
for the oven's internal ground bounce. The voltage drop caused by a normal
heater current is around 1/4 to 1/2mV for an MTI
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Well, it may not qualify as a standard, but I made a small synthesized
signal generator tonight using a Silabs Toolstick. It can be calibrated with
a DC voltmeter (how about that!), I would assume most anyone on this list
has
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