distortion may be appear on the waveform if this technique is used. This alternative test
arrangement is shown below:
If the AVO-6HF-B is operated at its maximum duty cycle, the worst-case power
dissipation in the output module is (250V × 5A × 4%) = 50 Watts. The internal fan must
have sufficient external ventilation to cool the module. The DB-9 control cable must be
connected as shown above for the fan to operate.
BASIC PULSE CONTROL
This instrument can be triggered by its own internal clock or by an external TTL trigger
signal. In either case, two output channels respond to the trigger: OUT and SYNC. The
OUT channel is the signal that is applied to the load. Its amplitude and pulse width are
variable. The SYNC pulse is a fixed-width TTL-level reference pulse used to trigger
oscilloscopes or other measurement systems. When the delay is set to a positive value
the SYNC pulse precedes the OUT pulse. When the delay is set to a negative value the
SYNC pulse follows the OUT pulse.
These pulses are illustrated below, assuming internal triggering and a positive delay:
23
SYNC
OUTPUT
AC
POWER
REAL-TIME
OSCILLOSCOPE
CHANNEL A
TRIG
INPUT
AVTECH
AVO-6
OUTPUT
MODULE
GND
OUT
scope
probe
1 Ohm
MAIN OUTPUT
CONNECTOR
IN
CONTROL
CONTROL
6-foot DB-9
control cable
6-foot RG-316
coaxial cable
Diode (device under test),
oriented for positive operation.
Reverse for negative operation.
Содержание AVO-6HF-B
Страница 37: ...PCB 158R4 LOW VOLTAGE POWER SUPPLY...
Страница 39: ...PCB 197G HIGH VOLTAGE DISCHARGE BOARD...
Страница 48: ...PERFORMANCE CHECK SHEET 48...