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Setting Up the Test - 3
21
Class D: Equipment having an input current with a "special wave shape" (e.g. equipment with
off-line capacitor-rectifier ac input circuitry and switch-mode power supplies) and an active input
power ≤ 600 W. The active power is defined as Watts. For the Class D mA/W limits to apply, the
active power must also be greater than 75 W.
Motor Driven Device: Check this box if the equipment you are testing is a motor-driven device.
This will cause class A limits to be used in accordance with EN 61000-3-2 regardless of the input
current waveshape.
Note The EN 60555 Part 2 regulation only applies to Class A and Class B equipment. The
Agilent 14761A HFTS software will reflect this based on the regulations selection made
in the Options/Defaults menu. See appendix D for information about class
determination.
Advanced Test Options
The advanced test options may be used to modify test conditions outside the range permitted for
compliance tests. They are selected in the Advanced window. Generally, you would not change the
factory default settings if you are doing compliance testing because the changes may invalidate the test.
As an exception to the above statement, the Current Measurement Range setting and the Current Limit
settings may be changed without invalidating the compliance test as long as the changed settings do not
cause current limiting to occur during the test. Current limiting may occur during the time period when
power is initially applied but before the test is run. This time delay may be specified in the Advanced
Setup window for tests, and in the Pre-test window for pre-tests. Current limit errors are detected and
displayed if they occur during the test. Note that you can also set test limit overrides < 100% without
automatically flagging the test as non-compliant.