Fluke PM-3384B First falling edge equals the REFerence MIDDle until, PDUTycycle Referencemiddle

COMMAND REFERENCE		4 - 69
:MINimum	No parameters. Measures the MINimum instantaneous voltage
	value of the waveform. The unit of MINimum is volt.
:NDUTycycle	<reference_middle>
	Measures the negative duty cycle. The negative duty cycle is
	the ratio (percentage) of the negative width (NWIDth) and the
	PERiod of the waveform, as shown in figure 3.2.
:NWIDth	<reference_middle>
	Measures the negative width, which is the time duration of the
	negative pulse. This time period extends from the moment that
	the first falling edge equals the REFerence MIDDle until the
	next rising edge equals the same reference level, as shown in
	figure 3.2. The negative width is expressed in seconds.
:PDUTycycle	<reference_middle>
	Measures the positive duty cycle. The positive duty cycle is the
	ratio (percentage) of the positive width (PWIDth) and the
	PERiod of the waveform, as shown in figure 3.2. DCYCle is an
	alias of PDUTycycle.
:PERiod	[<expected_period> [,<period_resolution>]]
	Measures the period of the input signal. The period is the
	inverse of the FREQuency and is expressed in seconds.
:PTPeak	No parameters. Measures the peak to peak value of the input
	signal. The peak to peak value is the difference between the
	MAXimum and MINimum value of the waveform. The PTPeak
	value is expressed in volts.
:PWIDth	<reference_middle>
	Measures the positive width, which is the time duration of the
	positive pulse. This time period extends from the moment that
	the first rising edge equals the REFerence MIDDle until the next
	falling edge equals the same reference level, as shown in figure
	3.2. The positive width is expressed in seconds.
:TMAXimum	No parameters. Measures the time of the first occurrence of the
	MAXimum voltage of the input signal. The unit of TMAXimum is
	seconds.