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Appendix B: Automatic Measurements Reference
B-50
CSA8000B & TDS8000B User Manual
Non-Return -to-Zero (NRZ) Measurements - Timing
Table B--8 topic describes each NRZ measurement in the timing category. See
Table B--7 on page B--37 for amplitude category measurements.; see Table B--9
on page B--55 for area category measurements.
Table B- 8: NRZ Measurements - Timing
Name Definition
NRZ Bit Rate The inverse of the time interval between two consecutive eye-crossing points. In other words, it
is the reciprocal of the Bit Time.
Where Tcross2 and Tcross1 are the mean of t he histogram of t he two consecut ive eye
crossings. 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 automat ically set the measurement system to use a waveform database if available.
See Use a Waveform Database on page B--70.
NRZ Bit Rate =
1
(Tcross2 − Tcross1)
NRZ Bit Time NRZ Bit Time is measured as the time interval between two consecutive eye-crossing points.
NRZ Bit Time = Tcross2 – Tcross1
Where Tcross2 and Tcross1 are the mean of t he histogram of t he two consecut ive eye
crossings.
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 automat ically set the measurement system to use a waveform database if available.
NRZ Crossing Time The horizontal position of the eye crossing. Data is sampled on a horizontal slice at the eye
crossing, and the mean of t he horizont al histogram returns the crossing time.
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 automat ically set the measurement system to use a waveform database if available.