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From: time-nuts on behalf of paul swed
Sent: Tuesday, February 20, 2018 9:16:32 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Looking for some Frequency Electronics info
Walter pure speculation.
Maybe the 100 MHz is superposed to be locked to the
Walter pure speculation.
Maybe the 100 MHz is superposed to be locked to the 10 MHz.
With a scope see what the drift rates are between the two.
Adjust EFC slowly to get the 100 MHz to go below the 10 MHZ if its running
fast.
See if the light changes to green.
If it does you know that the system is
Hi
If it works like the unit that replaced it, it has a level detect on the
external
input that rejects signals below some threshold. It either locks up to the
internal
standard or to the external input. All of the outputs are in the 7 to 13 dim
range
when operating.
The fault circuit looks a
about it, I will post it here.
Thanks, Dick, W1KSZ
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From: time-nuts on behalf of Arthur Dent
Sent: Monday, February 19, 2018 9:35:14 PM
To: time-nuts@febo.com
Subject: [time-nuts] Looking for some Fre
Some time ago bought one on Ebay for under $50 just because it looked
interesting. It isn't a prototype but most of the FEI units probably
had limited production. It seemed to be more complicated than I
expected it to be but if I understood it better it would make more
sense.
The 10Mhz board is en
start with the power supplies, and go on until morning...
Don
On 2018-02-19 16:57, walter shawlee 2 wrote:
I recently got a strange little 1U FEI rack mounted unit called an
FE-7923F-100-1,
which appears to have rear 10MHz and dual 100Mhz outputs. it is called
a Frequency Reference Unit.
sadly,
I recently got a strange little 1U FEI rack mounted unit called an
FE-7923F-100-1,
which appears to have rear 10MHz and dual 100Mhz outputs. it is called a
Frequency Reference Unit.
sadly, my unit has a fault light, and no outputs. All the internal supplies look
good, and there is an FE-83AA
