Agilent Technologies U8001A User's And Service Manual page 66

5 Service Guide
54
Load Transient Response Time
This test measures the time for the output voltage to recover to
within 15 mV of nominal output voltage following a load change
from full load to half load or vice versa.
Procedures:
1 Power off the power supply and connect the output to be
tested as shown in
Operate the electronic load in constant current mode.
2 Power on the power supply.
3 When the display is in the limit mode, program the output
voltage to full rated value, i.e. 30 V and output current to the
maximum programmable value.
4 Enable the output.
5 Set the electronic load to transient operation mode between
one half of the output's full rated value and the output's full
rated value at a 1 kHz rate with 50% duty cycle.
6 Set the oscilloscope coupling, internal sync and lock on
either the positive or negative load transient.
7 Adjust the oscilloscope to display transients as shown in
Figure 5- 4. Note that the pulse width (t2–t1) of the
transients at 15 mV from the base line is no more than 50 µs
for the output.
Figure 5- 2(A) with an oscilloscope.
U8001A/U8002A User's and Service Guide