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 50W (or higher) 50Ω load to the OUT connector and place
the scope probe across this load. The load resistor must have a voltage rating of at
least 250V. 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.
2. Set the oscilloscope to trigger externally with the vertical setting at 50 Volts/div and
the horizontal setting at 100 ns/div. Be sure that your oscilloscope and probe setup
can handle the maximum amplitude of 250V. The 50Ω load resistor should be rated
for at least 250V of voltage and 50W of power.
3. Turn on the AVR-AHF-1-B. The main menu will appear on the LCD.
4. To set the AVR-AHF-1-B to trigger from the internal clock at a PRF of 10 kHz:
24
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
