Fluke PM-3380B, PM-3390B, PM-3370B, PM-3394B, PM-3384B Waveform measurements, Pulse characteristics

USING THE COMBISCOPE INSTRUMENTS 3 - 11

3.3.3Waveform measurements

The following figure shows the terms used for pulse measurements and the key words that are used as header nodes in the measurement instructions.

	TMAXimum
			MAXimum
RISE	RISE TIME		FALL TIME	FALL
OVERshoot				PREShoot
HIGH
REFerence
HIGH
		AMPLitude		PTPeak
REFerence
MIDDle
REFerence
LOW
LOW	RISE		FALL
	PREShoot	OVERshoot
				MINimum
	TMINimum
		PWIDth		NWIDth
			PERiod	ST7154

Figure 3.2 Pulse characteristics

The reference high and low parameters determine the desired interval for rise time and fall time measurements. The default low and high references are 10% and 90% of the pulse amplitude (= HIGH - LOW).

Default REFerence LOW =LOW + 0.1 * (HIGH - LOW)

Default REFerence HIGH =LOW + 0.9 * (HIGH - LOW)

In a similar way, the reference middle parameter determines the desired interval for pulse width (PWIDth, NWIDth) and duty cycle (PDUTycycle, NDUTycycle) measurements. When defaulted, the reference middle value is assumed to be at 50% of the amplitude.

Default REFerence MIDDle =LOW + 0.5 * (HIGH - LOW)