User Manual

Appendix B: Calibration Series 2200 Programmable DC Power Supplies Reference Manual
B-34 2200S-901-01 Rev. A/November 2011
Figure 23: 20 MHz voltage noise test setup
5. Set the oscilloscope as follows:
a. 1 mV/division
b. 1 M  input resistance
c. 20 MHz bandwidth (BW) limit
d. AC Coupled
e. Auto-trigger
f. 1 ms/div
g. Set to measure Vp-p and VRMS
6. Set the DUT to the 100% FS output voltage.
7. Set the DUT to the 100% FS output current.
8. Turn the DUT output on.
Do not touch the load resistor. The load resistor may become hot enough to cause burns.
9. Enter the oscilloscope measurements into the Voltage noise at 20 MHz (on page B-10) table for
checking Noise at 20 MHz.