HP 4155A, User'S Task Manual

Page: 153 / 279

Making a Measurement
Stress Force
T o Set up A C (Pulse) Stress
1. Press the 4
Stress
5 key in the P A GE CONTROL key group . Conrm that the
following is set on the STRESS: CHANNEL DEFINITION page for the PGUs
that you want to set up for ac stress:
VPULSE is set in the MODE eld.
SYNC is set in the FCTN eld.
2. Select
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STRESS SETUP primary softkey .
3. In the PERIOD eld, enter the pulse period.
4. In the WIDTH eld, enter the pulse width.
5. In the DELA Y TIME eld, enter the delay time , which is the time from the
stress start to the beginning of the pulse leading edge . See following gure .
6. In the PEAK V ALUE eld, enter the pulse peak value .
7. In the B ASE V ALUE eld, enter the pulse base value .
8. In LEADING TIME eld, enter the leading-edge transition time of pulse .
9. In TRAILING TIME eld, enter the trailing-edge transition time of pulse .
The same period you set for PGU1 is also used for PGU2. F or the other
parameters , you can set dierent values for PGU1 and PGU2.
T o set other areas of the STRESS: STRESS SETUP page , see \T o Set up Stress
Condition/Timing".
T o modify the UNIT and NAME elds.
Modify UNIT and NAME elds on STRESS: CHANNEL DEFINITION page .
T o set output impedance of PGU1 or PGU2.
In the IMPED ANCE eld, select:
N
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LOW secondary softkey to set output impedance to low (approximately
zero).
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50 ohm secondary softkey to set output impedance to 50 .
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