What about this:
Use an NTP client running on a Smartphone. Such NTP clients are available for
Pocket PCs, Symbian OS, etc.
Dominik Schneuwly
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Tom Van Baak
Sent: samedi, 20. août 2005 21:00
To: Discussion
Poul-Henning Kamp wrote:
In message [EMAIL PROTECTED], Chuck Harris writes:
I met a violinist some years back who suffered from a 440Hz tinitus on his
left ear. When he tuned his fiddle after that, it was 440.0Hz measured
with a frequency counter.
Did you make this measurement, or were you
In message [EMAIL PROTECTED], Chuck Harris writes:
Uhm, sorry, that is just plain wrong. The Ferrantis (sp?) power
meter which is the most widely used meter in the world is not
frequency sensitive within a band of +/- 10% or more.
I have never seen a power meter made by Ferranti in the US.
Chuck Harris wrote:
A 10% variation in line frequency would cause a 10% variation in power
consumption registered. Induction type power meters will remain accurate
with a 10% variation in power line voltage, however.
Someday, our utilities will convert all of our meters to solidstate
units
In message [EMAIL PROTECTED], Chuck Harris writes:
Poul-Henning Kamp wrote:
In message [EMAIL PROTECTED], Chuck Harris writes:
I met a violinist some years back who suffered from a 440Hz tinitus on his
left ear. When he tuned his fiddle after that, it was 440.0Hz measured
with a frequency
At 10:00 AM 8/22/2005, you wrote:
Poul-Henning Kamp wrote:
In message [EMAIL PROTECTED],
Bill Hawkins writes
:
Power companies bill on time-integrated power - watt-hour
meters in the US. Watt-hour meters are still mostly driven
by electric clocks, in a way. The frequency does matter.
Uhm,
John Day wrote:
I have never seen a power meter made by Ferranti in the US.
Try Siemens or ABB then, Ferranti has been taken over if I recall.
The term is actually Ferraris, after Galileo Ferraris, the inventer of
the AC induction motor. As far as I can tell, he had nothing to do with
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.
/tvb
___
Poul-Henning Kamp wrote, quoting me,
Power companies bill on time-integrated power - watt-hour
meters in the US. Watt-hour meters are still mostly driven
by electric clocks, in a way. The frequency does matter.
Uhm, sorry, that is just plain wrong. The Ferrantis (sp?) power
meter which is the
In message [EMAIL PROTECTED], Bill Hawkins writes
:
1. It is unlikely that any power network just lets itself go,
with no standard time/frequency to hold. The under-frequency
relays would make that hazardous.
Does not follow.
Well, it doesn't follow from the watt-hour meter, but look at
the
On 8/22/05, Tom Van Baak [EMAIL PROTECTED] 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.
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.
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 data automatically, otherwise it
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 an ISA GPIB card
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
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 expensive on
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
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 Alberto I2PHD
Alberto di Bene wrote:
I am fearing that finding drivers for this card won't be that easy...
I was wrong ! I have just found the drivers here :
http://www.cec488.com/gpibupgd.html
A free download... now the quest for the ISA PC can start... :-)
73 Alberto I2PHD
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...
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 my
Agilent also now has a USB to GPIB converter. Of course it's several hundred
dollars also, and uses the Agilent I/O libraries. Not sure, but I think that it
only supports Windoze. I'll check with some of my buddies that survived to see
it that's the case.
Daun
-Original Message-
From:
I _strongly_ recommend National Instruments for anything GPIB-related. It
is much cheaper on eBay than buying anything new from Agilent, and much
better for your sanity than buying anything from an unheard-of GPIB
manufacturer.
I write a fair amount of homebrew TM software; most of it is
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