1 Calibration Procedures
54 Keysight U3606B Service Guide
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.
1 Turn off the instrument and connect an oscilloscope between the front panel
(red) and (black) output terminals (see Figure 1-13, “Test setup for load
transient response time verification,” on page 35).
2 Turn on the instrument. Press [Voltage] to select the constant voltage mode.
Ensure that appropriate range is selected.
3 Set the output voltage to the full rated value (30 V for S1 range, 8 V for S2
range, or 1 V for S2m range) and current to full scale.
4 Connect an additional electronic load across the front panel (red) and
(black) output terminals in parallel with a oscilloscope. Operate the electronic
load in the constant current (CC) mode.
5 Set the electronic load in transient operation mode between one half of the
output full rated value and the output full rated value at a 1 kHz rate with 50%
duty cycle.
6 Set the oscilloscope for AC coupling, internal synchronization, and lock on
either the positive or negative load transient.
7 Adjust the oscilloscope to display transients as shown in Figure 1-17. Note
that the pulse width (t
2
– t
1
) of the transients at 15 mV from the base line
should be no more than 100 μs for the output.
8 Repeat step 2 to step 7 for the S2 (8 V/3 A) and S2m (1000 mV/3 A) ranges. All
the transient response time result should less than 100 μs for the output to
recover to within 15 mV as shown in Table 1-17.
Table 1-16 Constant voltage RMS noise verification test
Output voltage Range (parameter) Error from nominal 1-year
30 V with 30 Ω S1 (30 V)
±0.002 V
rms
8 V with 2.67 Ω S2 (8 V)
±0.002 V
rms
1 V with 0.33 Ω S2m (1000 mV)
±0.002 V
rms
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