Avtech AVR-EB4-B, Instructions Manual, Page: 62 / 83

TROUBLESHOOTING
If you obtain “strange” output waveforms, or unexpected values of t
RR
, keep these
points in mind:
1) The test jig output must be terminated with 50 Ohms.
2) The coaxial cable connecting the test jig to the output module should normally be
as short as possible (60 cm or less).
3) If the measured t
RR
seems too long, try reducing the length of the coaxial cable
connecting the test jig to the output module as much as possible. (This may or
may not affect the measured value, depending on the exact diode switching
characteristics.)
4) If reflections are observed on the output waveform, increase the length of the
coaxial cable connecting the test jig to the output module so that the reflections
do not overlap with the reverse transient. This will probably not change the
measured value, but it will keep the two effects isolated (the reverse transient
and the reflections), for greater measurement confidence.
5) Keep device lead lengths as short as possible, to minimize parasitic inductance.
6) The test jig lid must be closed, or the pulser output will be disabled.
For technical support, contact info@avtechpulse.com . Sample waveforms and digital
photos of your setup are always helpful!
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