Tektronix CSA8000B, TDS8000B CSA8000B & TDS8000B User Manual B-53

Appendix B: Automatic Measurements Reference
CSA8000B & TDS8000B User Manual B-53
Table B- 8: NRZ Measurements - Timing (cont.)
Name Definition
NRZ Phase
Where:
HTcross1 of source1 is the time of the first crossing of either polarity on source 1.
HTcross3 of source1 is the time of next crossing on source 1of the same polarity as
Tcross1.
HTcross1 of source2 is the time of the first crossing of either polarity on source 2 after
Tcross1 of source1.
HAll Tcrossings are at the mid-reference level, which is adjustable and defaults to 50%
of the NRZ eye amplitude. See NRZ Crossings on page B--64.
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 =Tcross1of source2 −Tcross1 of source1
Tcross3 of source1 −Tcross1 of source1 ⋅360
NRZ Pk-Pk Jitter The delta between the minimum and maximum of time crossings, with the mean of the
histogram being Tcross.
Pk-PK Jitter = Tcrosspp
The Jitter At control in the Measurement Setup dialog specifies whether the jitter is to be
measured at the eye cross or at the mid-reference level. See To Localize a Measurement on
page 3--83.
The mid-reference level is adjustable and defaults to 50% of the eye amplitude.
If enabled, measurement gates constrain the measurement region to the area between the Start
Gate (G1) and Stop Gate (G2).
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.