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Using HP 4193A vector meter - RF Cafe Forums
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xile
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Post subject: Using HP 4193A vector meter
Posted: Fri Feb 22, 2008 4:29 pm
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Joined: Fri Feb 22, 2008
4:01 pm Posts: 2 |
Hi all, New here. What does it mean if phase
angle > 90 degree when calibrating the probe
on the vector meter by connecting the probe to ground?
The R component becomes negative! And at lowest
possible frequency 400 kHz, the phase angle is not
stable, jumping from -88 to + 100. Why?
Thanks in advance.
_________________ Cheers, Xile
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skywave |
Post subject:
Posted: Wed Sep 10, 2008 6:12 pm
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Joined: Wed Sep 10, 2008
5:49 pm Posts: 4 Location: Central England
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The rapid variation in phase could be because your
"ground" is not really ground. There could be all
sorts of RF pick-up, including the supply freq.
and harmonics of it and all manner of other crap
noise.
_________________ Quantum Mechanics - the
dreams that Stuff is made of.
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Posted 11/12/2012
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