Service and Maintenance 8
E364xA User’s and Service Guide 219
1 Turn off the power supply and connect the output to be tested as shown in
Figure 8-2 to an oscilloscope (AC coupled) between the (+) and (–) terminals.
Set the oscilloscope to the AC mode and bandwidth limit of 20 MHz. Connect
a resistive load (13.5 Ω)
[1]
to the terminal at B as shown in Figure 8-4.
2 Turn on the power supply. Select the high voltage range (20 V/1.545 A)
[2]
,
enable the output, and set the display to the limit mode. When the display is in
the limit mode, program the current to the maximum programmable value
(1.545 A)
[3]
and the voltage to the full rated value (20.0 V)
[2]
.
3 Check that the front panel CV annunciator remains lit. If it is not lit, adjust the
load down slightly.
4 Note that the waveform on the oscilloscope does not exceed the peak-to-peak
limit of (5 mV)
[4]
or (8 mV)
[5]
.
5 Disconnect the oscilloscope and connect the AC rms voltmeter in its place
according to the “Vrms measurement techniques” on page 218 and as shown
in Figure 8-4. The rms voltage reading must not exceed the rms limit of 0.5
mV
[4]
or 1 mV
[5]
.
6 Repeat step 1 through step 5 for the other output.
[1] For the E3646A model. For other models, refer to Table 8-4.
[2] For the E3646A model. For other models, refer to Table 8-5.
[3] For the E3646A model. For other models, refer to Table 7-3.
[4] For the E3646A/E3648A model.
[5] For the E3647A/E3649A model.
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