Appendix B: Automatic Measurements Reference

CSA8000B & TDS8000B User Manual B-33

Table B- 5: RZ Measurements - Timing (cont.)
Name Definition
RZ Phase
Where:
HTcross1 of source1 is mean of the histogram at the time of the first crossing of either
polarity on source 1. See RZ Crossings on page B--61.
HTcross3 of source1 is the mean of the histogram at time of the next crossing on source
1of the same polarity as Tcross1.
HTcross1 of source2 is the mean of the histogram at the time of the first crossing of
either polarity on source 2 after Tcross1 of source1.
HAll Tcrossings are at the mid-reference levels, which are adjustable and defaults to
50% of the RZ maximum pulse amplitude. See Mid-reference level on page B--69.
If enabled, measurement gates constrain the measurement region to the area between the Start
Gate (G1) and Stop Gate (G2). See To Localize a Measurement on page 3--83.
This measurement requires the use of a waveform database. When this measurement is turned
on, it will automatically set the measurement system to use a waveform database if available.
See Use a Waveform Database on page B--70.
Phase =Tcross1 of source2 −Tcross1 of source1
Tcross3 of source1 −Tcross1 of source1 ⋅360
RZ Pk-Pk Jitter The delta between the minimum and maximum of time crossings at the reference level, with the
mean of the histogram being Tcross.
Pk-PK Jitter = Tcrosspp
The mid-reference level is adjustable and defaults to 50% of the RZ maximum pulse amplitude.
The jitter measurement can be performed on the positive or negative slope.
The slope can be selected to be the first positive, the first negative, or the first crossing (positive
or negative) in the region.
If enabled, measurement gates constrain the measurement region to the area between the Start
Gate (G1) and Stop Gate (G2). By default, the algorithm searches forward from the Start Gate
for the first specified edge, but the Direction of traversal can be reversed, so that the search will
be backward from the Stop Gate.
This measurement requires the use of a waveform database. When this measurement is turned
on, it will automatically set the measurement system to use a waveform database if available.