Thanks again to the generosity of Rob Kimberley who provided the original,
I have upoladed a scan of the manual for the Efratom VRFS rubidium
frequency standard to Rapidshare.
The VRFS is a VXIbus module that contains an Efratom FRS rubidium standard
plus the associated electronics to provide and control a variety of
outputs.
The manual doesn't contain any internal details of the FRS module itself,
separate manuals are already available for this online, but as well as
detailed installation and programming information it does contain full
schematics of the control board includng details of the phase locked loop
circuit
and the filter stages for the various outputs.
Whilst being of obvious value to existing owners of the VRFS unit this
manual should also be of interest to anyone considering the implementation of
sinusoidal outputs for their own frequency divider/distribution system.
I haven't provided an optimised pdf for this one as optimisation did
produce some noticeable effects on the schematics so just the original 32MB
file
is available......
_https://rapidshare.com/files/450749387/Efratom_VRFS.pdf_
(https://rapidshare.com/files/450749387/Efratom_VRFS.pdf)
As always, if anyone would like to upload this to Didier's site or
elsewhere to ensure its ongoing availability that would be much appreciated.
regards
Nigel
GM8PZR
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