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5 - 48 FUNCTION REFERENCE
The following measurements are available:
volt: dc, rms, min peak, max peak, pk-pk, low level, high level, overshoot
(positive and negative), preshoot (positive and negative)
time: frequency, period, pulse width, rise time, fall time, duty cycle
delay: channel to channel on leading or trailing edges
Refer to the functions TIME MEASUREMENT, VOLT MEASUREMENT, and
DELAY MEASUREMENT for more information.
Execution of these measurements can also be controlled by pressing the
command switch on the measuring probe in the TOUCH, HOLD & MEASURE
mode. (Refer to the appropriate function for more information.)
Appendix E gives the complete menu structure of the MEASURE menu.
All calculated measurements are made using the HISTOGRAM method. The
HISTOGRAM method is used to assure that measurements on signals with
distortion, overshoot, ringing, or noise, establish the most probable signal levels
as references for the 0 % and 100 % amplitude levels.
The next figure shows all parameters used in this method.
All calculated measurements are made following a fixed sequence:
1. Using the HISTOGRAM algorithm, determine the HIGH-LOW levels and the
MIN-MAX levels. These parameters are used to define the 0% and 100%
voltage levels of the signal.
2. Calculate the MESIAL, DISTAL, and PROXIMAL levels. These voltage levels
are derived from the HIGH and LOW.
1st DISTAL
1st MESIAL
1st PROXIMAL
2nd DISTAL
2nd MESIAL
2nd PROXIMAL
3rd DISTAL
3rd MESIAL
3rd PROXIMAL
MAX
HIGH
90%
50%
10%
LOW
MIN
ST6743