Avtech AVP-AV-1S-C, Instructions Manual

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MINIMIZING WAVEFORM DISTORTIONS
USE 50 Ω TRANSMISSION LINES AND LOADS
Connect the load to the pulse generator with 50Ω transmission lines (e.g. RG-58 or RG-
174 cable).
This instrument requires a 50Ω load for proper operation. It will not properly drive a
high-impedance load. The output stage will be damaged if it is operated into an open
circuit (or any other high impedance). Failures due to improper output loading are not
covered by the warranty.
USE LOW-INDUCTANCE LOADS
Lenz’s Law predicts that for an inductive voltage spike will be generated when the
current through an inductance changes. Specifically, V
SPIKE
= L × dI
LOAD
/dt, where L is
the inductance, I
LOAD
is the load current change, and t is time. For this reason, it is
important to keep any parasitic in the load low. This means keeping wiring short, and
using low inductance components. In particular, wire-wound resistors should be
avoided.
PREVENTING DAMAGE
The AVP-AV-1S-C may fail if triggered at a PRF greater than 1 MHz.
This unit is designed to operate into a load impedance of 50 Ohms and the output
stage will be damaged if it is operated into an open circuit (or any other high
impedance). Failures due to improper output loading are not covered by the warranty.
The lifetime of the switching elements in the pulse generator module is proportional to the
running time of the instrument. For this reason the prime power to the instrument should
be turned off when the instrument is not in use.
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