The Tek 465 and many other scope models can be used as a TDR
without building any circuitry. One simply needs to take the A gate
signal out of the rear panel of the scope and connect it in parallel with
the transmission line or antenna under test at the vertical scope input.
The gate signal provides a fast rise pulse on the line under test at the
beginning of the trace. Of course the sweep must be free running.
Reflections are easily seen as a result. I have used this very
technique with both single and dual direction Beverage antennas.
Lee K7TJR OR
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UR RST IS ... ... ..9 QSB QSB - hw? BK
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