Verification and Adjustments 2
Keysight E36200 Series Service Guide 65
4 Use an appropriate load resistor (see the fixed load value in the Recommended
test equipment list) to keep the power system at the instrument setting
specified in Table 2-6.
5 As shown in the figure, use two BNC cables to connect the differential
amplifier to the (+) and (−) output terminals. Each cable should be terminated
by a 50 Ω resistor. The shields of the two BNC cables should be connected
together. Connect the differential amplifier output to the oscilloscope with a
50 Ω termination at the oscilloscope input.
6 Set the differential amplifier to multiply by ten, divide by one, and 1 MΩ input
resistance. Set the differential amplifier's positive and negative inputs to AC
coupling. Set the oscilloscope’s time base to 5 ms/div, and the vertical scale to
10 mV/div. Turn the bandwidth limit on (usually 20 or 30 MHz), and set the
sampling mode to peak detect.
7 Program the power supply to the settings indicated in the in the test record
form for the appropriate model under Table 2-6 and enable the output.
Let the oscilloscope run for a few seconds to generate enough measurement
points. On the Keysight Infiniium oscilloscope, the maximum peak-to-peak
voltage measurement is indicated at the bottom of the screen on the right
side. Divide this value by 10 to get the CV peak-to-peak noise measurement.
The result should not exceed the peak-to-peak upper limits for instrument's
“CV ripple and noise, peak-to-peak” value. See the “Test Record Forms” on
page 74 for details.
8 Disconnect the oscilloscope and connect an rms voltmeter in its place. Do not
disconnect the 50 Ω termination. Divide the reading of the rms voltmeter by
10. The result should not exceed the rms limits in the test record form for the
appropriate model under “CV ripple and noise, rms”. See the “Test Record
Forms” on page 74 for details.
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