[time-nuts] Things to look for when buying a few FE-5680A's?

Scott Newell newell+timenuts at n5tnl.com
Thu Jan 26 12:54:45 EST 2012

At 11:36 AM 1/26/2012, Chris Albertson wrote:

>The "option 2" that is in the book is different from the fine scale
>adjustment the current $40 can do.   the true option two units can be
>programmed over a range of many MHz by sending RS232 commands but the
>current units can only by programmed over rs232 withina very narrow
>range about like you'd find on a typical OCXO.

I don't think this is accurate--the FEI tech manual for option 2 
claims tuning resolution of 1.8e-7 Hz, so 32 bits of that is about 
770 Hz of tuning range.

*Maybe* option 8 (customer specified frequency 1 Hz to 20 MHz) is the 
wide range RS-232 tuned variant?

newell  N5TNL 

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