If you go by what HP's frequency counters expected/accepted, it's
roughly a volt rms, perhaps within a factor of 2. Some go as high as
5V, but that's not what's required -- it's what's tolerated. There
does not appear to be a fixed standard, but that range should put
you in the ballpark. Just remember that this information is worth
twice what you paid for it.
Good luck!
-- Cheers
Tom
--
Prof. Thomas H. Lee
Allen Ctr., Rm. 205
350 Jane Stanford Way
Stanford University
Stanford, CA 94305-4070
On 9/6/2022 11:22, david vanhorn wrote:
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I'm fighting a problem with some signal generators and I
thought this group might have some information I need.
?
1: For a "typical instrument" what level should the 10 MHz
input be?? These SGs say NOTHING in the manual about that.
?
2: My past experience with older HP/Tek gear is that if you
provide an input they use that, otherwise they use their
internal. ? I've seen instruments that have 10MHz input and
output connectors separately, but now I'm faced with a new
twist, a single connector marked 10 MHz In/Out? These units let
you manually select ext or internal, but if the ref goes away
for a moment, or the power is lost, the SG switches back to
internal without notifying you, AND forces it's internal 10 MHz
out on the cable, which distorts and beats against the 10 MHz
being supplied, potentially screwing up any other instruments on
that feed!
?
This seems totally insane to me.? What I would expect is that
the SG delivers no signal output, and to maybe display "NO
REFERENCE" or some such, but NOT to automatically go back to
internal (about 2 to 4 Hz off on these units) and to force that
signal out onto the 10 MHz signal bus.
?
I've thought up some workarounds but so far it's all pretty
kludegy and inelegant.
