95x Series Operating Manual - May 17, 2022
Page
71
of
155
ACTIONS WHILE RUNNING
•
Breakdown and (optionally) arc detection are performed throughout the test. On any failure the pulse is
immediately aborted.
•
A U pulse is shown above, a UNIPOLAR- pulse has the same timing but has the opposite voltage
polarity, a BIPOLAR pulse is a pair of opposite polarity pulses (positive first) with no delay between them.
•
A delay is enforced following the pulse(s) to allow any stored energy in the 95x or the DUT caused by
asymmetry in the waveform to dissipate.
o
After a unipolar pulse of either polarity or after an abnormally terminated bipolar pulse, this delay is
500ms.
o
After a normally terminated bipolar pulse, this delay is 40ms.
CONFIGURING
An example PULSE menu is as follows
–
Seq 1 Step 1 PULSE
LEVEL: 200.0V
POLARITY: U
BREAKDOWN: 150.0mApk
RAMP: 1.0msec
HOLD: 1.5msec
ARC DETECT:4us 10mA
ON FAIL: ABORT SEQ
•
LEVEL
. Allows the test voltage level to be programmed. For a bipolar pulse, both polarities have
nominally the same voltage amplitude.
o
The amplitude of the pulse is not accurately controlled by the 95x during this type. The actual
peak voltage amplitude is displayed for review after a test step has been run, enabling the user
to adjust the peak test voltage for a specific DUT. Alternatively, the 95x can do this semi-
automatically by using the Lead Compensation feature.
•
POLARITY
. Allows the polarity of the pulse to be selected.
o
U
.
A single, positive polarity, pulse of voltage is produced.
o
UNIPOLAR-
.
A single, negative polarity, pulse of voltage is produced.
V
O
LTAG
E
TIME
RAMP
(tr = 0.5 to 20ms)
HOLD
(0.5 to 30ms)
RAMP
(= tr)
