... and running it to a sound card (oscillator gps disciplined)
How did you achieve this?
Thanks
Stewart
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Yes, I'm also interested in how-to. At the moment I think it is a hack:
there is no sound card AFAIK that accepts a reference input. I have
recently bought an Acqiris/Agilent DP105/U1067A 150MHz 500Ms/s digitizer
PCI card that accepts an external 10MHz as a reference for the sampling
process.
On
I think a number of higher-end sound cards accept a word clock or
world clock (I've seen it both ways) that's intended to allow syncing
to an external source. The challenge I've seen is that the frequency
(either in the 12 or 24 MHz range) is one that's not simple to
synthesize precisely
On 7/6/12 7:51 AM, Azelio Boriani wrote:
Yes, I'm also interested in how-to. At the moment I think it is a hack:
there is no sound card AFAIK that accepts a reference input. I have
recently bought an Acqiris/Agilent DP105/U1067A 150MHz 500Ms/s digitizer
PCI card that accepts an external 10MHz as
On 7/6/12 7:51 AM, Azelio Boriani wrote:
Yes, I'm also interested in how-to. At the moment I think it is a hack:
there is no sound card AFAIK that accepts a reference input. I have
recently bought an Acqiris/Agilent DP105/U1067A 150MHz 500Ms/s digitizer
PCI card that accepts an external 10MHz as
OK, found it: the RME HDSPe RayDAT PCIe audio card has this reference but
with the optional extension card (of course). It is $950 for the card + the
expansion card for the world clock...
On Fri, Jul 6, 2012 at 5:09 PM, Jim Lux jim...@earthlink.net wrote:
On 7/6/12 7:51 AM, Azelio Boriani
Word clock generators appear to exist that will accept standard external
reference frequencies. One of the vendors also sells a stand alone 10 MHz
rubidium reference for driving their word clock generator.
Sent from my iPod
On 2012-07-06, at 8:09 AM, Jim Lux jim...@earthlink.net wrote:
On
I think a number of higher-end sound cards accept a word clock or world
clock (I've seen it both ways) that's intended to allow syncing to an
external source. The challenge I've seen is that the frequency (either in
the 12 or 24 MHz range) is one that's not simple to synthesize precisely
I don't know if they've been discontinued, but a number of the M-Audio
cards had word clock inputs as well. They are/were pretty widely
available on eBay.
John
On 7/6/2012 11:24 AM, Azelio Boriani wrote:
OK, found it: the RME HDSPe RayDAT PCIe audio card has this reference but
with the
...@febo.com [mailto:time-nuts-boun...@febo.com] Im
Auftrag von John Ackermann N8UR
Gesendet: Freitag, 6. Juli 2012 16:58
An: Discussion of precise time and frequency measurement
Betreff: Re: [time-nuts] Allan Deviation question
I think a number of higher-end sound cards accept a word clock
Removed the oscillator and send it the required freq (24.576MHz) that is
disciplined to 10MHz. Put an sma connector next to the card in the little
cover on the pci slot. Currently using my ds345 but am getting a Valon
Synthesizer board with a divider. Tried ve1alq but the dividers aren't
OK, I'll take a look at my cheap audio cards searching for the oscillator.
On Fri, Jul 6, 2012 at 5:59 PM, Bill Dailey docdai...@gmail.com wrote:
Removed the oscillator and send it the required freq (24.576MHz) that is
disciplined to 10MHz. Put an sma connector next to the card in the little
On 07/06/2012 04:58 PM, John Ackermann N8UR wrote:
I think a number of higher-end sound cards accept a word clock or
world clock (I've seen it both ways) that's intended to allow syncing
to an external source. The challenge I've seen is that the frequency
(either in the 12 or 24 MHz range) is
On 07/06/2012 05:09 PM, Jim Lux wrote:
On 7/6/12 7:51 AM, Azelio Boriani wrote:
Yes, I'm also interested in how-to. At the moment I think it is a hack:
there is no sound card AFAIK that accepts a reference input. I have
recently bought an Acqiris/Agilent DP105/U1067A 150MHz 500Ms/s digitizer
I am measuring a 10MHz OCXO. I am wondering about my methods and their
effect of Allan Deviation.
SETUP:
I am running the signal into my radio (gps disciplined) and taking the
resulting audio and running it to a sound card (oscillator gps disciplined)
then looking at the result in Spectrum
I think that no one can say anything on that setup. Anyway, try this: run
the GPSDO 10MHz into the radio and take the measurements. Then run your
signal and let us know the difference. Usually running the reference
against itself (if possible) gives the noise floor of the measurement
setup... if
Hi Bill,
On 07/04/2012 10:23 PM, Bill Dailey wrote:
I am measuring a 10MHz OCXO. I am wondering about my methods and their
effect of Allan Deviation.
SETUP:
I am running the signal into my radio (gps disciplined) and taking the
resulting audio and running it to a sound card (oscillator gps
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