Without knowing details of calibration, let me point to a power
supply/fixture 283 (I think) that supplies power to S52 and feeds trigger
signal to front panel. Something like that could be used to get signal out
of S52 when 7S12 is not available. Alternatively, a 284 can be used as a
pretty good signal source.
While on the sampling gear subject, could someone tell me more about S4. I
have been told that construction of S4 is quite terrible, so sampling pulses
blow by on the bridge is significant and low level signals can be drown in
that noise. I gentleman who told me about that, said that he almost scrapped
amplifier that he was building, but power meter showed no noise, so he went
out and found S6, which confirmed that amplifier was all right.
The S4 has marginally higher bandwidth, but because of that rumor I stayed
away from it and opted for S6.
Regards
Miroslav Pokorni
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----- Original Message -----
From: "Craig Sawyers" <c.sawyers@...>
To: "TekScopes Yahoo Group" <TekScopes@...>
Sent: Tuesday, March 02, 2004 8:24 AM
Subject: RE: [TekScopes] 7S/7T Sampling System
Have you considered a 7S14 instead of a 7T11/7S11/Sx. The 7S14 is often
overlooked because it is one of the original 7000 plugins. The 7S14 is a
1
GHz Dual Trace Sampling plugin with the sampling heads and a delayed
timebase all built in to a very easy to use self contained unit.
I don't think that necessarily helps - the full cal procedure for the test
fixures calls for a 7S12; a pulse generator (S52) is used to supply a
clean
and fast pulse and the two sampling heads look at the + and - differential
signals coming out. The ampifier compensation is then tweaked to minimise
aberrations. I guess that a 7S14 could be used with a seperate 100ps
pulser, but that would only do for the -00 suffix fixture. The -01
procedure calls for S2's with 4.6GHz bandwidth. I don't have the
procedure
for the -02.
Craig
