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Originally Posted by Rickertsen2
The output of the victor is a duty cycle modulated square wave but its's frequency is high enough that for out purposes as well as modeling purposes it can be treated as if it were variable voltage DC. Since it is a square wave and it is of sufficiently hihg frequency its "RMS voltage" can be measured with accuracy without a "true RMS" meter.
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I'm going to say you can't acurately measure the voltage with a voltmeter by the definition of RMS.
VRMS = 0.7 × Vpeak
VRMS = 0.7 * 12V = 8.4V
Since we're pulsing +12V DC (changing the duty cycle), theoreticly, the voltage should always be 8.4 Volts.
EDIT: This is only true for a sine wave (AC voltage). Give me a minute for a square wave.
EDIT2: Because our duty cycle changes it throws off the RMS calculation big time. The above equation is true for a 50% duty cycle square wave.