5520A
Operators Manual
4-20
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9. Press E. The calibrator clears your entry from the Control Display and copies
it into the Output Display (below is typical).
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10. Press O to activate the calibrator output.
A softkey label for range appears on the Control Display in the dc voltage function:
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• Range (Operating Range) selects autorange (auto) or lock (locked) for the present
range. When auto (the default setting) is selected, the calibrator automatically selects
the range that provides the best output resolution. When locked is selected, the
calibrator will not change ranges when you are editing the output. The locked
selection is usually made when you do not want range changes that may cause a
small perturbation in the output, e.g., when checking the linearity of a given
multimeter range.
4-23. Setting AC Voltage Output
You may select an ac voltage output in volts or as a power output in dBm, where dBm is
10 log(Pout/.001) , where Pout is expressed in watts. The output range is 1 mV to
1000 V. When selecting dBm outputs, the 5520A calculates dBm at a selected
impedance level. Based on this, the formula is:
20 log(V) - 10 log(Impedance * .001) = dBm.
Complete the following procedure to set an ac voltage output at the 5520A front panel
NORMAL terminals. If you make an entry error, press Gto clear the display, then
reenter the value.
Caution
Verify the applied voltage to the UUT does not exceed the
rating of the UUT insulation and the interconnecting wiring.
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