Tektronix CSA8000B - Manual (Page 317)

Appendix B: Automatic Measurements Reference
CSA8000B & TDS8000B User Manual B- 55
Non-Return-to-Zero (NRZ) Measurements - Area
Table B--9 topic describes each NRZ measurement in the area category. See
Table B--7 on page B--37 for amplitude category measurements.; see Table B--8
on page B--50 for timing category measurements.
Table B- 9: NRZ Measurements - Area
Name Definition
NRZ Area The area under the curve for the NRZ waveform within the measurement region. Area
measured above ground is positive; area measured below ground is negative.
over the measurement 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.
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.
For best results with this measurement:
H Perform a Dark Level compensation before taking this measurement 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.
NRZ Area
=
ጺ
waveform(t) dt,
NRZ Cycle Area The area under the curve for the first NRZ bit time within the measurement region. Area
measured above ground is positive; area measured below ground is negative.
over the first NRZ bit within the measurement region.
When this measurement is turned on, it will automatically set the measurement system to use a
waveform database if available.
For best results with this measurement:
H Perform a Dark Level compensation before taking this measurement 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.
NRZ Area
=
ጺ
waveform(t) dt,