[time-nuts] Adapting my GPSDO to the FE-5680A

[GandalfG8 at aol.com]

Thanks. I’ve taken your suggestion for the sine-to-square converter.
I  believe there are two separate commands for tuning the 5680 - one is “
temporary”  and one writes through to the EEPROM. I’ll be using the latter, 
of course.
 
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I'm surprised nobody else seems to have  commented on this but I'm  pretty 
sure that using the write to EEPROM option on an automatically  and 
regularly repeated basis could be somewhat akin to applying the  kiss of death.
 
Obviously the threat will depend upon how frequently it's decided the  
incremental change needs applying, presumably quite a bit less frequently for a  
rubidium module than a crystal oscillator, but in the longer term could it  
not approach the limits for the device?
 
I would have thought the "temporary" option is to be preferred, and  
certainly this is what I've always used when manually adjusting FE5680As, until  
such time as I'm sure the applied value is close enough to be stored  
permanently.
 
Other than needing to start over in the case of power removal I can't  see 
any obvious disadvantages to this, and if the software can be made to report 
 the current increment on request then presumably that could be noted every 
few  months or so and perhaps an updated value permanently programmed, or 
even as  infrequently as once a year say shouldn't really be too much of an 
issue.
 
Nigel
GM8PZR