User Manual

Series 2200 Programmable DC Power Supplies Reference Manual Appendix B: Calibration
2200S-901-01 Rev. A/November 2011 B-35
Check current noise
Equipment required
(Item 5) High current hook up wire (bold line
connections)
(Item 12) Oscilloscope
(Item 11) 1  Load Resistor
(Item 14) Oscilloscope 10X probe
1. Plug the DUT into your local line power from the mains.
2. Plug the test oscilloscope into the same mains outlet as the DUT.
Some AC Power Sources create large amounts of high frequency noise on the power line that the
instrument may not fully reject. Noise directly on the mains is typically better controlled.
Use the same mains outlet for both the DUT and test oscilloscope to avoid ground loops which may
cause noise.
3. Power on the DUT and test oscilloscope.
Ensure the warm-up criteria has been met as described in the Performance Verification Conditions.
4. Set up the equipment as shown in the following figure.
Use the appropriate load resistor depending on the model of the DUT. See Voltage noise at 20
MHz (on page B-10) for information.
Figure 24: 20 MHz current noise test setup