Thanks for the reply John.
J. Forster wrote:
Likely yes, but check the spec. If the output circuit is a low Zout buffer
amp and two separate roughly 50 Ohm resistors, they should be independent.
Or, two distinct buffers could be used too.
Ah yes, the spec that's in the manual that I don't have! :-) I don't
know if HP often revises specs or procedures on newer versions of the
same model number. If not, my unit has a problem.
You can do a simple check with an Ohmmeter, with the unit powered OFF.
Measure the R between the front and rear output center pins. If it's close
to zero, they are likely just paralleled, not individually buffered.
Yes, the front and rear outputs are directly connected - no resistors or
buffers.
As to the amplitude growth, try a different cable length., It might be a
resonance w/ the cable length terminated by the 'scope's C.
I just realized that it's not the device on the end of the cable, it's
the cable itself. Attaching a cable with nothing on the end causes the
meter reading to increase. Not the kind of thing you expect from HP. I
tried the same test on an RF generator at 10 MHz and a similar signal
level. The cable length had no effect on the signal amplitude.
Definitely pointing to a circuit trouble.
Ed
Best,
-John
============
[snip]
In summary, should I be able to use both front & rear connectors
simultaneously without disrupting the other outputs and does it make
sense that high impedance connections cause the 5 MHz level to rise?
Sorry for the rather long message. Thanks for any help anyone can
provide.
Ed
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