Performance Veri
fi
cation
Check Current Noise
Equipment required
(Item 5) High current hook up wire
(bold line connections)
(Item 12) Oscilloscope
(Item 11) 1
Ω
Load Resistor
(Item 14) Oscilloscope 10X probe
For each channel sequentially.
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.
NOTE.
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.
NOTE.
Ensure the warm-up criteria has been met as described in the Performance
Veri
fi
cation Conditions.
4.
Set up the equipment as shown. (See Figure 9.)
Figure 9: 20 MHz current noise test setup. The channel 1 test setup is shown.
Series 2200 Multichannel Programmable DC Power Supplies Technical Reference
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