[time-nuts] Rb as source for ADEV?

Orin Eman orin.eman at gmail.com
Sun Feb 9 13:55:39 EST 2014


Bob,

If you want a C++ class to talk to the Prologix Ethernet, I have one.  (I
don't have a USB version, but that would just be a matter of implementing a
simple subclass to do the communication with the device.)

I also have code that uses the above and talk to a 5335A and to a 5370A,
both of which like to sulk if you don't do things in the right order.

It's written for Windows and should compile in the _free_ Visual Studio
Express 2012 (it used to, but the last time I built it was with the full
version).  Porting to Linux/Mac/iOS would be easy enough... maybe I'll do
iOS for fun, if Xcode doesn't sulk and stays alive long enough that is; the
only thing Xcode does fast for me is crash!

Licensing for all but the findAdapters method will be LGPL once I put
headers in.  findAdapters() is derived from John Miles's GPIB library and
subject to its licensing.

Orin,
KJ7HQ


On Sun, Feb 9, 2014 at 7:36 AM, Bob Stewart <bob at evoria.net> wrote:

> Hi Hal,
>
> I'm thinking about doing it, but I'm still doing extended tests of my
> GPSDO with the 5334B.  So in order to get access to the 5335A, I'll have to
> write a server for my Prologix GPIB Ethernet adapter.  I've got a lot of
> time nuts projects stacked up, and it looks like the GPIB server is going
> to be key to all of them.
>
> Bob - AE6RV
>
>
>
>
>
> >________________________________
> > From: Hal Murray <hmurray at megapathdsl.net>
> >To: Bob Stewart <bob at evoria.net>; Discussion of precise time and
> frequency measurement <time-nuts at febo.com>
> >Cc: hmurray at megapathdsl.net
> >Sent: Saturday, February 8, 2014 10:48 PM
> >Subject: Re: [time-nuts] Rb as source for ADEV?
> >
> >
> >
> >bob at evoria.net said:
> >> Would I learn anything useful by hooking my Rb standard up to my 5335A
> and
> >> comparing that to the OCXO?
> >
> >What kind of time-nut question is that?  :)
> >
> >Try it and see.   Maybe you will find something interesting where you/we
> >didn't expect it.
> >
> >If you assume the Rb is stable, you should be able to watch the long term
> drift of the OCXO.  How many low digits can you get out of the 5335A?
> >
> >Do you have an GPSDO to add to the mix?  That would let you calibrate the
> Rb.
> >
> >
> >
> >--
> >These are my opinions.  I hate spam.
> >
> >
> >
> >
> >
> >
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