Step 2. Turn on the power analyzer and program the instrument settings as described in the test
record form under “CV Load Effect”.
Step 3. Set the electronic load for the output channel’s current as described in the test record form
under “CV Load Effect”. The output status should be “CV”. If it isn’t, adjust the load so that the output
current drops slightly.
Step 4. Record the output voltage reading from the DMM.
Step 5. Open the load. Record the voltage reading from the DMM again. The difference between the
DMM readings in steps 4 and 5 is the load effect, which should not exceed the value listed in the test
record form for the appropriate model under “CV Load Effect”.
Step 6. For models N6781A, N6782A, and N6784A only. Repeat steps 2 through 5 for the 6 V range.
Constant Voltage Source Effect (all models except N678xA SMU)
Test category = performance
This test measures the change in output voltage that results from a change in AC line voltage from the
minimum to maximum value within the line voltage specifications.
Step 1. Turn off the power analyzer and connect the ac power line through a variable voltage
transformer or an AC source.
Step 2. Connect a DMM and an electronic load (see Test Setup A). Set the transformer or AC source to
nominal line voltage.
Step 3. Turn on the power analyzer and program the instrument settings as described in the test
record form under “CV Source Effect”.
Step 4. Set the electronic load for the output channel’s current as described in the test record form
under “CV Source Effect”. The output status should be “CV”. If it isn’t, adjust the load so that the
output current drops slightly.
Step 5. Adjust the AC input to the lowest rated line voltage (86 VAC).
Step 6. Record the output voltage reading from the DMM.
Step 7. Adjust the AC input to the highest rated line voltage (264 VAC).
Step 8. Record the output voltage reading on the DMM. The difference between the DMM reading in
steps 6 and 8 is the source effect, which should not exceed the value listed in the test record form for
the appropriate model under “CV Source Effect”.
Constant Voltage Ripple and Noise
Test category = performance
Periodic and random deviations in the output combine to produce a residual AC voltage superimposed
on the DC output voltage. This residual voltage is specified as the rms or peak-to-peak noise in the
frequency range specified in the Keysight N6700 DC Power Analyzer Family Specifications Guide.
8 Verification and Calibration
378 Keysight N6705C Operating and Service Guide
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