[time-nuts] Turn Dynamic Systems FSA3011A timelab setup

[Tom Van Baak]

Bill,

I have some info on the FSA3011 here:

http://leapsecond.com/pages/FSA3011/

It's self-powered over USB; no device configuration or switches; your PC 
will recognize it as an FTDI virtual serial port. The data rate is 
115200 baud. It quietly calibrates for a minute and then spits out phase 
differences once a second. AFAIK it's a talk-only device so very easy to 
use.

You can either record the data with a serial terminal program and then 
use TimeLab's "acquire from live ASCII file" input mode. Or you can 
configure TimeLab to read the serial port directly. Set data type to 
"unwrapped phase difference" and sampling interval to 1 second.

Note that although it says "0 to 100 MHz" what that actually means is 
only inputs that are exactly 100/n MHz. So your REF and DUT need to be 
100 MHz or 50 MHz or 33.33333333 MHz or 25 MHz or 20 MHz or 10 MHz or 5 
MHz or 2.5 MHz, etc. Also, in my experience it won't lock if either the 
REF or the DUT frequency is inaccurate.

Let me know if how yours works. I've had nothing but trouble here with 
the FSA3011.

/tvb


On 6/13/2020 11:47 AM, Bill Notfaded wrote:
> Does anyone have any good docs or configuration experience with setting up
> timelab for FSA3011A?  I'm curious what the best settings to start with
> are?  I'm used to using SRS SR620, Pendulum, and HP 5313xA counters so far
> with timelab.  The DTMD are new to me.  I've got a bunch of Rb, OCXO, and
> GPSDO I want to compare and qualify.
>
> Bill in sunny Scottsdale, AZ.
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