[time-nuts] BG7TBL FA1 frequency analyzer

[Christoph Kopetzky]

I also think that it cannot replace a TimePod. But at this price it 
should be good for doing some experiments. The other choice I would take
is the FSA3011 from the chinese oem TURN Dynamic Systems...
It costs four times more but seems to be a little bit more professional...
My interest would be whether these can do phase noise measurements. That 
would be fine.
Are there any time-nuts here having done experiments with the FSA3011? 
The results would be very interesting.

In the next time I want to do a compare of both and will post the 
experience and diagrams here.
But not before the end of october. I unfortunately have to go for a 
surgery next week. After that I am in a health resort for some weeks.

Best regards

Chris

Am 02.09.2019 um 22:08 schrieb Mark Sims:
> Yes, it should work with Timelab, Stable32, etc.  It streams a series of frequency measurements every second out the USB port (it uses a FTDI chip for the USB interface).  The data is of the format:
> "   F:0123456789.123456789<cr><lf>"  (without the quotes)
>
> Measurements with a PLL unlock error are preceded by an '*'.   I've only seen unlocks when changing the input freq from say 1 MHz to 10 MHz.  I get two flagged measurements each time the freq changed.   I don't know how small a freq change can cause an unlock.
>
> I don't know if Timelab can directly take the output data stream because of the leading "F:".  You may need to capture data to a file and edit off the "   F:"
>
> I also don't know how well it would work for phase noise measurements... it would be no where as good as a TimePod.   I am doing some tests to see how well it compares to a TAPR TICC.
>
> BTW,  my FA1 seems to have a frequency measurement bias of around -0.0002 Hz on a 10 MHz signal.  Also, I don't see any temperature related variation in the measurements... air conditioning was swinging the room temp over a 2 degree C span and I saw no traces of it in the results.
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