time-nuts Digest, Vol 168, Issue 24
(too old to reply)
Joseph Gwinn
2018-07-29 14:12:44 UTC
Message: 2
Date: Thu, 26 Jul 2018 12:45:47 -0700
Subject: [time-nuts] 10 MHz 'failover' switch?
Content-Type: text/plain; charset=utf-8
Looking for recommendation for a ?failover? or ?redundant? switch for
10 MHz distribution.
Not really sure of the correct term.
Something that sensed RF on primary 10 MHz, and then switched to
secondary on fail of primary.
A brief search showed several very nice $$$ items, suitable for
commercial applications,
but I wonder if there are some ?last year?s? (but not last century)
versions that would work for a home lab.
I have a GPSDO and a Rb source of 10 MHz.
The power supply on the GPSDO failed (worked enough to light up the
GPSDO, but not enough to lock).
I have a new power supply on order, but would be nice to have ?insurance?.
Thanks in advance for the group bandwidth.
End of time-nuts Digest, Vol 168, Issue 24
There is a Time-Nut level answer: US 9,261,587 "Methods and apparatus
for highly reliable signal distribution". The key is that only one
reference is allowed to sing at any time, greatly reducing leakage and
the resulting phase disturbances. (The references are not turned on
and off.)

Joe Gwinn

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