e: Wed, 30 Sep 2015 11:45:49 +0100
> > From: cjaysh...@gmail.com
> > To: time-nuts@febo.com
> > Subject: Re: [time-nuts] FE-5680B Rubidium and DDS
> >
> > Bryan, I think we do, bought from an eBay seller named Fluke.I?
> >
> > I also found that schema
to be firmware driven.
Cheers
-=Bryan=-
> Date: Wed, 30 Sep 2015 11:45:49 +0100
> From: cjaysh...@gmail.com
> To: time-nuts@febo.com
> Subject: Re: [time-nuts] FE-5680B Rubidium and DDS
>
> Bryan, I think we do, bought from an eBay seller named Fluke.I?
>
> I also found
I *think* that's the method posted by the seller of my unit and it's a
modification requiring an extra chip to divide the 20MHz signal down.
I am hoping to be able to re-enable the original 10MHz signal and use the
original filter as fitted to the board.
Still handy if you need 10MHz though.
On
On Sat, 26 Sep 2015 07:36:30 +0100, Clint Jay wrote:
*** SNIP
> so it may be
> possible to modify the B version Bryan and I have.
*** SNIP
Someone just published a 10Mhz writeup on eevblog
http://www.eevblog.com/forum/testgear/fe-5680b-1pps-to-10mhz/30/?
action=post;quote=767280;last_ms
gt; -=Bryan=-
>
> > Date: Tue, 29 Sep 2015 15:41:37 +0100
> > From: cjaysh...@gmail.com
> > To: time-nuts@febo.com
> > Subject: Re: [time-nuts] FE-5680B Rubidium and DDS
> >
> > I've made some investigations and re-confirmed my earlier findings on the
100
> From: cjaysh...@gmail.com
> To: time-nuts@febo.com
> Subject: Re: [time-nuts] FE-5680B Rubidium and DDS
>
> I've made some investigations and re-confirmed my earlier findings on the
> FE-5680B I have.
>
> It locks from cold in under five minutes and runs at app
this standard on my blog if
> anyone is interested?
>
>
>
> On 26 September 2015 at 11:23, Bryan _ wrote:
>
>> Thanks Hal, that's interesting, will try and see how far I can get.
>> -=Bryan=-
>>
>> > To: time-nuts@febo.com
>> > From: hmur...@megap
at 11:23, Bryan _ wrote:
> Thanks Hal, that's interesting, will try and see how far I can get.
> -=Bryan=-
>
> > To: time-nuts@febo.com
> > From: hmur...@megapathdsl.net
> > Date: Fri, 25 Sep 2015 23:40:40 -0700
> > CC: hmur...@megapathdsl.net
> > Subjec
Thanks Hal, that's interesting, will try and see how far I can get.
-=Bryan=-
> To: time-nuts@febo.com
> From: hmur...@megapathdsl.net
> Date: Fri, 25 Sep 2015 23:40:40 -0700
> CC: hmur...@megapathdsl.net
> Subject: Re: [time-nuts] FE-5680B Rubidium and DDS
>
>
>
The 10MHz output comes from the XC9572 CPLD but the fact that it's there
for a few seconds makes me thing it's possible to recover it, by fair means
or foul.
It's possible it's just a gate, certainly looks like it's bing switched off
and there's a file which claims to be a dump of the CPLD (as wel
100
> From: cjaysh...@gmail.com
> To: time-nuts@febo.com
> Subject: Re: [time-nuts] FE-5680B Rubidium and DDS
>
> Bryan, I also found a stable 30MHz which I think is used to clock the
> optional DDS board so I intend to experiment adding an AD9851 board with 6x
> multiplier enabled
> I as well wish there was a quick way of converting it back to 10Mhz. I am
> sure it can be done, just not sure how or where to look
If the 10 MHz is visible for a second or two, there is probably a gate to
turn it on/off. If I wanted 10 MHz, I'd open it up and trace the wire back.
If it goe
-10mhz/msg556800/#msg556800
> I as well wish there was a quick way of converting it back to 10Mhz. I am
> sure it can be done, just not sure how or where to look
>
> -=Bryan=-
>
> > From: kb...@n1k.org
> > Date: Fri, 25 Sep 2015 17:45:08 -0400
> > To: t
o.com
> Subject: Re: [time-nuts] FE-5680B Rubidium and DDS
>
> Hi
>
> There is no dump of the firmware. The problem you are most likely
> having is not firmware related.
>
> If the VCXO i the unit drifts to far it needs to be re-tuned. Until this is
> done
> the devic
Hi
There is no dump of the firmware. The problem you are most likely
having is not firmware related.
If the VCXO i the unit drifts to far it needs to be re-tuned. Until this is done
the device simply sits in a “search for lock” loop forever and ever.
Simple way to do it:
Monitor the VCXO and b
I've recently purchased one of the PPS Only FE Rubidium standards from eBay
and, like many others I suspect, haven't been able to get a stable output
frequency that lasts longer than a few seconds from the module.
It appears that the 10MHz source vanishes after a few seconds but this is
controlled
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