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Bruce,
Great!
Henk
On Nov 8, 2007, at 22:11, Bruce Griffiths wrote:
> Henk ten Pierick wrote:
>> On Nov 6, 2007, at 22:43, Bruce Griffiths wrote:
>>
>>
>>> NIST's AC standard is currently useful for generating frequencies
>
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Henk ten Pierick wrote:
> On Nov 6, 2007, at 22:43, Bruce Griffiths wrote:
>
>
>> NIST's AC standard is currently useful for generating frequencies
>> up to
>> 100kHz with 10MHz the projected useful limit for a 10Gb/s bit s
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On Nov 6, 2007, at 22:43, Bruce Griffiths wrote:
> NIST's AC standard is currently useful for generating frequencies
> up to
> 100kHz with 10MHz the projected useful limit for a 10Gb/s bit stream.
> With say a 1Mb/s bit stre
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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 ac
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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 th
als. It was not
repairable.
Bill Hawkins
-Original Message-
From: Neon John
Subject: Re: [time-nuts] OT: AC voltage standard
None of that is particularly relevant here because he needs a simple
circuit to check the accuracy of a 6 bit ADC in a scope. The RMS value
doesn't matter
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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
>frequ
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The DDS chip is a good idea. That's what they are made for. They still need an
external frequency reference though, and unless you use a part with direct
frequency entry (which may be high pin-count), you will probably need a
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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 n
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 wi
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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
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 wi
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 is
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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
Joe,
The H-P 435A, 436A, 437A & 438A power meters all
have a 50 MHz calibrator source specified to +/-0.7%
at 0dBm (+/- 0.35% in votlage). This still requires some
traceable calibration, but they tend to be quite close even
when past the cal due date.
Pete Rawson
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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:
> ); SAExim
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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 perc
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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 determi
-Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Joe McElvenney
> Sent: Tuesday, November 06, 2007 5:57 AM
> To: time-nuts@febo.com
> Subject: [time-nuts] OT: AC voltage standard
>
> Hi,
>
> Excuse the topic but is does p
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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 t
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