Avtech AVR-G5-B, Instructions Manual

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OPERATIONAL CHECK
This section describes a sequence to confirm the basic operation of the instrument. It
should be performed after receiving the instrument. It is a useful learning exercise as
well.
Before proceeding with this procedure, finish read this instruction manual thoroughly.
Then read the “Local Control” section of the “Programming Manual for -B Instruments”
thoroughly. The “Local Control” section describes the front panel controls used in this
operational check - in particular, the MOVE, CHANGE, and ADJUST controls.
1. Connect a cable from the SYNC OUT connector to the TRIG input of an
oscilloscope. Connect a 100 kΩ (or higher) load to the OUT connector and place
the scope probe across this load. The load resistor must have a voltage rating of at
least 400V. The power dissipated in the resistor is given by
P = (V 2 / R) × (PW / T) = (V 2 / R) × PW × f
where “V” is the output voltage, “R” is the load resistance, “PW” is the pulse width,
and “T” is the pulse period (1/frequency), and “f” is the frequency. If a 100 kΩ
resistor is used, the worst-case power dissipation is 0.5 Watts. (Ohmite “OY”
ceramic composition resistors -
http://www.ohmite.com - are recommended for such
applications. These resistors are readily available from http://www.digi-key.com/
and other distributors.)
2. Set the oscilloscope to trigger externally with the vertical setting at 100 Volts/div
and the horizontal setting at 1 us/div. Be sure that your oscilloscope and probe
setup can handle the maximum amplitude of 220V. A high-voltage attenuator might
be necessary to avoid damaging the probe and oscilloscope.
AVTECH
PULSER
MAIN OUTPUT
CONNECTOR
SYNC
OUTPUT
AC
POWER
ALL CABLES: 50 OHM COAXIAL
REAL-TIME
OSCILLOSCOPE
CHANNEL A
TRIG
INPUT
SCOPE
PROBE
TEST
LOAD
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