[time-nuts] Measuring Phase diference between different GPSDO

[Mark C. Stephens]

Hey Bob, I was thinking the exact same thought, and I found a NI PCI-GPIB card in a PC with a dead HDD.
These appear to be 5V PCI cards so I can't stick it in a nice rack mount server with raid as they all seem to be 3.3v PCI.
So I put a new HDD in the PC and I have stuck WinXP on it.
Now I am awaiting further orders!  ;)

mark

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On Behalf Of Bob Camp
Sent: Friday, 3 May 2013 9:21 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Measuring Phase diference between different GPSDO

Hi

If you have a pile of GPIB cables, you may also have a GPIB card on a PC. You will have a lot more luck finding free software to read and log the data from the 5370 than from the 3575. As mentioned before, the 5370 will be much more accurate / higher resolution in this application. 

Bob

On May 3, 2013, at 12:28 AM, Mark C. Stephens <marks at non-stop.com.au> wrote:

> According to http://www.realhamradio.com/z3801a-turning-point.htm they use a HP 3575A phase meter to perform the measurement.
> Or perhaps I have misinterpreted the whole thing?
> 
> 
> I do have a temperature controlled workshop that is always 24 degrees so hopefully thermal drift won't be too much of an issue.
> 
> 
> mark
> 
> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] 
> On Behalf Of lists at lazygranch.com
> Sent: Friday, 3 May 2013 12:12 PM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] Measuring Phase diference between different 
> GPSDO
> 
> Meditating on this a bit, I assume in a strict sense, you can only consider GPSDOs phase locked if they are disciplined from the same GPS.
> 
> Or is this being pedantic?
> 
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