[time-nuts] BG7TBL FA1 frequency analyzer

[Bob kb8tq]

Hi

Assuming Mark’s data is at 10 MHz and 1 second then 0.0002 Hz is 20 ppt. That number
can be compared directly against data presented for a variety of other devices. By far the
best way to do the comparison would be to take data over a range of tau’s and look at the
resulting plot. That way you can be reasonably sure that there isn’t something weird going on
at one or another tau. 

Bob

> On Sep 4, 2019, at 1:07 AM, Christoph Kopetzky <ck at cksd.de> wrote:
> 
> This would be an interesting compare.
> I want to compare the FA1 and the TSA3011 if I am back in office and have both in my hands...
> But I really do not want to buy unnecessary tools...  So if someone has done this it would be nice to read about that.
> 
> Mark, do you have also a TICC?
> 
> best regards
> 
> Chris
> ---
> 'Everything should be made as simple as possible, but not simpler.' -- Albert Einstein
> 
> Am 03.09.2019 um 21:21 schrieb Jerry Hancock:
>> How would this compare to the TAPR TICC Rev D? The one that has the arduino base?  About half the price I see.
>> 
>> Regards,
>> 
>> Jerry
>> 
>> 
>>> On Sep 2, 2019, at 5:50 AM, Christoph Kopetzky <ck at cksd.de <mailto:ck at cksd.de>> wrote:
>>> 
>>> Hi Mark,
>>> 
>>> interesting post.
>>> So is the FA1 compatible with the TimeLab or Stable32 software?
>>> And could I do phase noise measurements with it like the TimePod?
>>> 
>>> 
>>> Chris
>>> 
>>> Am 30.08.2019 um 22:57 schrieb Mark Sims:
>>>> (Hopefully this is not a duplicate post...  hotmail has been having issues)
>>>> 
>>>> The FA1 is a small, USB powered frequency counter.   You supply it with a 10 MHz reference and an input frequency of 1 .. 80 MHz.   It outputs a text string of the measured frequency every second.  They cost around $80 .. $120.
>>>> 
>>>> Apparently there is a PLL inside... the text string has a "PLL unlock" flag.  There is no info on how it works and I have not opened mine up.
>>>> 
>>>> I did a simple noise test on one where the input and ref clocks were from a Tbolt.  It looks like the measurement noise is around +/- 0.0002 Hz.
>>>> 
>>>> Lady Heather can now read it.  Attached is a screen capture of the noise test.
>>>> 
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