Tektronix TDS 500D series User Manual

Appendix B: Algorithms
B–4
TDS 500D, TDS 600B, & TDS 700D User Manual
MCross1, MCross2, and MCross3 — refer to the first, second, and third 
cross times, respectively. (See Figure B–1.)
The polarity of the crossings does not matter for these variables, but the
crossings alternate in polarity; that is,  could be a positive or negative
crossing, but if  is a positive crossing,  will be a negative
crossing.
MidRef + (Hysteresis x Amplitude)
MidRef – (Hysteresis x Amplitude)
MidRef
MCross1
(StartCycle)
MCross2
MCross3
(EndCycle)
Figure B–1: MCross Calculations
The oscilloscope calculates these values as follows:
1. Find the first  in the waveform record or the gated region.
This is .
2. Continuing from , find the next  in the waveform
record (or the gated region) of the opposite polarity of . This is
.
3. Continuing from , find the next  in the waveform
record (or the gated region) of the same polarity as . This is
.
MCross1Polarity — is the polarity of first crossing (no default). It can be rising or
falling.
MCross Calculations

Tektronix TDS 500D series Specifications

General

Brand	Tektronix
Model	TDS 500D series
Category	Test Equipment
Language	English