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Appendix B: Automatic Measurements Reference
B-36
CSA8000B & TDS8000B User Manual
Return-to-Zero (RZ) Measurements - Area
Table B--6 describes each RZ measurement in the area category. See Table B--4
on page B--15 for amplitude category measurements; see Table on B--5 on page
B--29 for timing category measurements
Table B- 6: RZ Measurements - Area
Name Definition
RZ Area The area under the curve for the RZ waveform within the measurement region. Area measured
above ground is posit ive; area measured below ground is negative.
over the m easurement region.
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.
For best result s with t his measurement:
H Perform a Dark Level compensati on before taki ng this m easurement if the source of the
measured waveform is an optical channel. See To Perform Dark-Level and User
Wavelength Gain Compensations on page 3--98.
H Optimize the vertical resolution before taking this measurement. See How to Optimize the
Vertical Resolution on page B--70.
RZ Area =
ጺ
waveform(t) dt,
RZ Cycle Area The area under the curve for the first RZ bit period. Area measured above ground is posi tive;
area measured below ground is negative.
Where the m easurem ent regi on is f rom St art Gate (G1) to Stop Gate (G2), if measurement
gates are enabled, or the first acquired RZ cycle.
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.
For best result s with t his measurement:
H Perform a Dark Level compensati on before taki ng this m easurement if the source of the
measured waveform is an optical channel. See To Perform Dark-Level and User
Wavelength Gain Compensations on page 3--98.
H Optimize the vertical resolution before taking this measurement. See To Optimize the
Vertical Resolution on page B--69.
RZ Area =
ጺ
waveform(t) dt