On 11/8/19 4:00 PM, David Gilbert wrote:
By the way, I was wrong when I said earlier that TLW was telling me I
had a dead short. The graph only made it look like that, and a more
careful look at the axis dimensions said that the dips for each
frequency were always about 28 ohms resistive at the low power of my
analyzer ... which makes more sense than a short for a fault caused by a
high power RF arc over. I find that even more impressive (the data, not
my error), since it means that the location of even non-absolute
anomalies (neither open nor short) could potentially be found by this
method.
It's essentially like doing the FFT of a frequency sweep to do time
domain reflectometry.. And it's very, very sensitive. The one thing
that will cause troubles (with either approach sweeps or TDR) is some
sort of repetitive partial fault - because of ambiguities.
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