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Appendix B: Automatic Measurements Reference
CSA8000B & TDS8000B User Manual
B-33
Table B- 5: RZ Measurements - Timing (cont.)
Name Definition
RZ Phase
Where:
H Tcross1 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.
H Tcross3 of source1 is the mean of the histogram at time of the next crossing on source
1of the same polarit y as Tcross1.
H Tcross1 of source2 is the mean of the histogram at the time of the first crossing of
either polarit y on source 2 aft er Tcross1 of source1.
H All Tcrossings are at the mi d-reference levels, which are adj ustable and def aults 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 automat ically 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 t he 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 jitt er measurement can be performed on the positive or negative slope.
The slope can be selected to be the fi rst posi tive, the fi rst negat ive, 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 f irst speci fied 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 automat ically set the measurement system to use a waveform database if available.