[time-nuts] FE-5860A

[Stan W1LE]

Hello,

I agree, lots of options available from the factory. not only frequency, 
but voltage needed.

http://www.freqelec.com/prod_pdf/FEI%205680A%20Rb.pdf

Send an inquiry to the factory sales dept. about your specific model 
number and serial number.
They may help you sort it out, unless the data is proprietary for their 
original customer.

Accuracy depends on your requirements. Yes the Rb is accurate and 
stable, but it can drift in time.
My Rb was about 2 parts in E10 after 10 years on the bench. I plan to 
compare it to the Cs
derived LORAN-C, 100 KHz signals, thru a Austron 2100 timing receiver.
At this time I think I can be happy with 1 part in E11 for my station clock
and 1 part in E10 for HF frequency measurements.

Ignorance is bliss and knowledge is expensive. No plans for a Cs at this 
time.
If I can fully understand the LORAN-C accuracy's and the Austron timing 
RX, I will be at
a nice "interim" level of happiness.

I have gotten a 4 parts in E13 comparison between the LORAN-C and the 
GPS disciplined oscillator,
at least for a short time, multiple times a day.
Most readings are between E10 an E13 comparing the GPS DO and the 
Loran-C RX.
probably bouncing due to the propagation paths and propagation 
perturbations.
Loran-C secondary station is ~ 40 miles away, but GPS GEO sats are 
~26,000 Km away.

It all started with Frequency Measuring Contests and a lot of folks were 
orders of magnitude
 more accurate than I could get. I am closing the gap.


Stan, W1LE   FN41sr  Cape Cod






nnovotney at cinci.rr.com wrote:

>Hello:
>
>My different types of equipment (scope, freq cntr, spec analyzer, etc) never seem to be right on the money, so I decided to run them all off a commnon exact 10MHz rubidium source.
>
>I got an FE-5680A  (was on a chopped off ckt board-whcih is apparently part of some motorola system pcb)..I hooked pin 1 to +15V & pins 2 to gns ...but nothing came out any of the other pins?!??  Where is the output?  Do I need another cxonnection?  I read you might need to apply +5v, but  don't want to try unless I know what I'm doing.  How do you determine what option your unit has?  It looks like about 60 options are possible!!  By the way, with my spec analyzer probe nearby I am sniffing the 6.834xx GHz signal-so the Rb is in there doing its thing.
>
>As a second note, as I read around here, it seems (to my understanding) that the Rb osc is not exact--that in fact it needs calibrated!!  Well, I dont't want to cal it --I bought this "atomic clock"  to let me cal all of my various xtal oscilators.  How on earth shall I cal this thing?  If I don't cal, how far off is it?  Can i count on 9 digits of accuracy with "no cal"
>a
>thanks for your hints & direction....I think I'll enjoy this group & hope to make some contibutions once I get going.
>
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