[time-nuts] Have I wrecked my FE-5680A?

[EWKehren at aol.com]

Sadly yes
The reason we have not released our GPSDO for the FE5690/50 and FE405 is  
that we have experienced the same on all three devices. You are the 9th case  
that I know of. We know very little as to what exactly causes it but we are 
 incorporating circuitry to prevent it. What we know is that it is not a  
particular code sequence on the RS232 port, but what happens the operating 
code  is turning to mush. Some how the RS port is involved. Serious flaw on 
all  FE devices since most likely the code was written by the same individual.
Bert Kehren
 
 
In a message dated 4/28/2016 9:02:28 P.M. Eastern Daylight Time,  
time-nuts at febo.com writes:

Just as I  started testing the GPS discipline board prototype, my FE-5680A 
seems to have  developed a very odd problem.

If I give it power, it outputs a “kinda”  10 MHz sine wave while it sweeps 
around looking for a physics lock. This is as  expected.

About the time that I would expect the lock light to turn on,  instead the 
output just stops. The lock light never comes on.

This  unit’s been working fine for months now. It’s conceivable that I’ve 
sent it  some sort of serial command it couldn’t digest, but using the 
Windows  calibrator software seems to work - albeit there not being any output 
from the  oscillator at  all.


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