[time-nuts] Equipment question: OCXO versus GPSDO + XTAL

[Mark Spencer]

I'm inclined to agree.   (I'm not sure I'd want to use my Thunderbolt as the reference oscillator for an instrument that had 20 ps of resolution, nor would I trust the long term accuracy of an ocxo without being able to compare it to a reference such as an gpsdo.)



Sent from my iPad

On 2011-03-17, at 7:30 PM, "J. L. Trantham" <jltran at att.net> wrote:

> Personally, I would get both.
> 
> Joe
> 
> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
> Behalf Of J. L. Trantham
> Sent: Thursday, March 17, 2011 9:24 PM
> To: 'Discussion of precise time and frequency measurement'
> Subject: Re: [time-nuts] Equipment question: OCXO versus GPSDO + XTAL
> 
> 
> Depends on what you want.  Stability or accuracy?  Bench or portable?  The
> TBolt or another GPSDO will certainly be accurate.  Probably fairly stable
> as well.  However, if you need portability, the OCXO is the only way to go.
> You will have to look at the stability measurements of the OCXO versus the
> GPSDO to choose that one
> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
> Behalf Of Wolfgang
> Sent: Thursday, March 17, 2011 8:51 PM f 
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] Equipment question: OCXO versus GPSDO + XTAL
> 
> 
> On Friday 18 March 2011, Greg Broburg wrote:
>> I have a 53131 and 53181. There were several TB options.
>> I dont have a manual for the 53230A. If you could, see what the option
>> TB assembly PNs are, then go looking for these assemblies. Mine just 
>> dropped in and did the autocal right off. I paid 300 to upgrade the 
>> 53181. The autocal using a DAC works very well, no more tweaking Rs or 
>> Cs and waiting a day for them to restabilize.
>> 
> Don't recall where I read this but IIRC: 
> 
> There are several other options for the 53230A which can be added lateron 
> by the user ("kits") but the OCXO can only be installed lateron by sending 
> the device to service. 
> 
> Thanks to the list for the answers - but: 
> 
> It seems like everybody is telling me "go for the cheaper, add the OCXO 
> lateron if you need it" - but that's not what I'm after. What I'd really 
> like to do is to make up my mind based on educated opinions on this list 
> whether the built-in OXCO option offers any advantage at all compared 
> to standard clock + good external reference. 
> 
> - Wolfgang, DL1SKY
> 
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
> 
> 
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
> 
> 
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.