Alberto di Bene wrote:
Tom Van Baak wrote:
I measured the phase, frequency and Allan deviation of
the sound card on my cheap PC. You'll enjoy the results:
http://www.leapsecond.com/pages/sound-1pps/
If any of you with a high-end sound card want to repeat
the experiment let me know.
Unfo
From: David Kirkby <[EMAIL PROTECTED]>
Subject: Re: [time-nuts] Re: Accuracy of a sound card
Date: Mon, 22 Aug 2005 23:06:49 +0100
Message-ID: <[EMAIL PROTECTED]>
David,
> > Unfortunately, while my 5328B has the HPIB interface, my PC doesn't, so
> > I cannot collect
National Instruments sells (or at one time, sold) GPIB adapters that will
connect to any port on your PC, including USB, parallel, RS-232, the drain
in your bathtub, you name it. They are definitely the way to go.
There are certain OS limitations; for instance, NT-based versions of Windows
includ
Blackbox sells an RS-232 - IEEE488 adapter box. Search for IC026A-R2 on
www.blackbox.com.
It's not cheap, about $750.
-RL
Robert Lutwak, Senior Scientist
Symmetricom - Technology Realization Center
34 Tozer Rd.
Beverly, MA 01915
(9
From: Alberto di Bene <[EMAIL PROTECTED]>
Subject: [time-nuts] Re: Accuracy of a sound card
Date: Tue, 23 Aug 2005 00:45:59 +0200
Message-ID: <[EMAIL PROTECTED]>
> David Kirkby wrote:
>
> > If your PC has an ISA slot, or you have an older PC with an ISA slot,
> > then a GPIB board is not that exp
Alberto di Bene wrote:
David Kirkby wrote:
If your PC has an ISA slot, or you have an older PC with an ISA slot,
then a GPIB board is not that expensive on eBay. Just save yourself a
lot of hassle and get one from National Instruments, as they are
better supported than other makes.
I have a
Alberto di Bene wrote:
An old PC is probably your best bet.
Before I start hunting for an old PC with an ISA slot, does anybody know
if Capital Equipment Corporation (the maker of my ISA GPIB card) is
still in business ?
I am fearing that finding drivers for this card won't be that easy...
73
> I know :-( I checked the NI prices and for such a card they want a
> couple hundreds Euros or more...
> I am wondering... I know of the existence of USB <=> RS232 adaptors. May
> be someone sells also USB <=> GPIB converters ? Nobody knows ?
>
> 73 Alberto I2PHD
Alberto,
I do almost all
ssage-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
Behalf Of Tom Van Baak
Sent: Monday, August 22, 2005 10:43 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Re: Accuracy of a sound card
> I know :-( I checked the NI prices and for such
Sent: Monday, August 22, 2005 7:50 PM
> To: Tom Van Baak; Discussion of precise time and frequency measurement
> Subject: RE: [time-nuts] Re: Accuracy of a sound card
>
>
> Agilent also now has a USB to GPIB converter. Of course it's
> several hundred
> dollars also, and
Alberto di Bene wrote:
Alberto di Bene wrote:
P.S. Let me please test how this reflector behaves when sending HTML
messages... I have noticed a strange behavior in the past... it
insists on reformatting
the HTML message at its will...
Here following there should be an image... let's see i
In message <[EMAIL PROTECTED]>, John Ackermann N8UR writes:
>The list is set to convert HTML to plain text. That's what Mailman
>defaults to on setup, but I pretty strongly agree with that approach, so
>left it as is.
Yes please, no HTML if we can avoid it.
--
Poul-Henning Kamp | UNIX
Hi Alberto,
My point in starting this whole controversy was that there are no adjustments
on the sound cards, and the oscillators are just garden variety in quality.
Typically,
they are simply a miniature crystal that runs an oscillator on an ASIC. The
accuracy your
card gets is luck-of-the-d
In message <[EMAIL PROTECTED]>, Chuck Harris writes:
>No one has yet addressed the actual oscillator that is on board the sound card.
>What are they using on the Delta 44? ... the Aureon Sky? I would have much
>more confidence if they would at least use a cheap TCXO module.
Using a tcxo for a s
From: Alberto di Bene <[EMAIL PROTECTED]>
Subject: [time-nuts] Re: Accuracy of a sound card
Date: Tue, 23 Aug 2005 19:35:58 +0200
Message-ID: <[EMAIL PROTECTED]>
Alberto,
> Just for the sake of curiosity and to end this topic, I measured the
> accuracy of another sound card I have in my PC, a Ter
Hi Poul,
I am quite aware that making a soundcard more accurate is gilding the
lilly.
But if you return to the middle of this thread, where I offered powerline
noise up as a reasonably accurate, ubiquitious timing reference, and had
my suggestion refuted by a gentleman with a soundcard based spe
From: Chuck Harris <[EMAIL PROTECTED]>
Subject: Re: [time-nuts] Re: Accuracy of a sound card
Date: Tue, 23 Aug 2005 15:43:54 -0400
Message-ID: <[EMAIL PROTECTED]>
> Hi Poul,
Hi Chuck,
> I am quite aware that making a soundcard more accurate is gilding the
> lilly.
>
&g
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