Operational Check - Avtech AVR-8F-B-P-ADB1A Instructions Manual

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.
AC
POWER
1. Connect a cable from the SYNC OUT connector to the TRIG input of an
oscilloscope. Connect a 200Ω (or higher) load to the OUT connector and place the
scope probe across this load. The load resistor and the scope probe must have a
voltage rating of at least 1000V and an average power rating of 5 Watts. The power
dissipated in the resistor is given by
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. Factory tests are
conducted using a series-parallel combination resistors to make a high-voltage,
high-power, low-inductance composite load. Fan cooling the resistors allows for
slightly higher power dissipation. (Ohmite "OY" ceramic composition resistors -
http://www.ohmite.com
are readily available from
2. Set the oscilloscope to trigger externally with the vertical setting at 200 Volts/div
and the horizontal setting at 1 us/div. Be sure that your oscilloscope and probe

OPERATIONAL CHECK

AVTECH
PULSER
MAIN OUTPUT
CONNECTOR
SYNC
OUTPUT
ALL CABLES: 50 OHM COAXIAL
P = (V 2 / R) × (PW / T) = (V
- are recommended for such applications. These resistors
http://www.digi-key.com/
OSCILLOSCOPE
SCOPE
PROBE
CHANNEL A
TEST
LOAD
2 / R) × PW × f
and other distributors.)
REAL-TIME
TRIG
INPUT
26