[time-nuts] My FE-5680A Came In Today

[Bob Camp]

Hi

The PPS is fed by a (weak) gate that has a goofy supply arrangement. It will drive a CMOS load, but not a lot else. On some units it only comes on once the Rb locks up.

Bob

On Sep 17, 2013, at 7:00 PM, Bob Stewart <bob at evoria.net> wrote:

> Hi Nigel,
> 
> All I know is what's on the ebay listing.  It's number 270851051022.  There is a tiny RF connector on the top board of the 3 that are stacked inside the package that correlates with other modded boards I've seen online.  It looks like people generally tap into that.  Mine is supposed to have a 1PPS signal on pin-6, which I do not see.  Also, there is a flashing LED inside that is not synced to 1PPS.  I dunno whether that means it's not synced up yet, or that it is.  Funny that it's just blinking, and not a 1PPS heartbeat.
> 
> Bob
> 
> 
> 
> 
>> ________________________________
>> From: "GandalfG8 at aol.com" <GandalfG8 at aol.com>
>> To: bob at evoria.net 
>> Sent: Tuesday, September 17, 2013 5:46 PM
>> Subject: Re: [time-nuts] My FE-5680A Came In Today
>> 
>> 
>> 
>> Hi Bob
>>  
>> Do you know what version of the FE5680A you've bought, and where are 
> you measuring the frequency?
>>  
>> Regards
>>  
>> Nigel
>> GM8PZR
>>  
>> In a message dated 17/09/2013 23:22:03 GMT Daylight Time, bob at evoria.net 
> writes:
>> My  FE-5680A Rb standard came in today.  After the usual inspections etc, I  fired it up and I have the purple haze.  The native output is  8.38860798/9 (last digit jitter) as read on my 5335A using my GPSDO as an  external standard.  I've got a ways to go before it's all setup, but this  is looking good.  Does it warmup and change frequency at all, or can I  retune it to 10MHz and use it as a reference without any further  ado?
>>> 
>>> Can someone tell me what type of socket that is where you tap off 
>  the RF?  It looks sort of like a uFL connector, but a bit bigger.  
>  I'd rather avoid hacking and soldering on this if I can.  
>>> 
>>> Bob - 
>  AE6RV
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