Waveform Measurements - Fluke CombiScope PM3370B User Manual

USING THE COMBISCOPE INSTRUMENTS
3.3.3

Waveform 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.
RISE
OVERshoot
HIGH
REFerence
HIGH
REFerence
MIDDle
REFerence
LOW
LOW
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
Default REFerence HIGH =LOW + 0.9
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
TMAXimum
RISE TIME
RISE
PREShoot OVERshoot
TMINimum
PWIDth
Figure 3.2
MAXimum
FALL
FALL TIME
PREShoot
FALL
PERiod
Pulse characteristics
(HIGH - LOW)
*
(HIGH - LOW)
*
(HIGH - LOW)
*
MINimum
NWIDth
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