Tektronix CSA8000B Series, User Manual

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Appendix B: Automatic Measurements Reference
B- 8
CSA8000B & TDS8000B User Manual
Pulse Measurements - Timing
Table B--2 describes each pulse measurement in the timing category. See Table
on B--1 on page B--2 for amplitude category measurements; see Table B--3 on
page B--14 for area category measurements.
Table B- 2: Pulse Measurements - Timing
Name Definition
Burst width The time between the first and last crossings, either positive or negative, of the waveform at the
mid-reference level in the measurement region. See
Measurement Reference Parameters and
Methods on page B--56 or in the online help. Also see Reference Levels Method on page 3--79.
The mid-reference level is adjustable and defaults to 50% of the pulse amplitude.
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.
Cross+ The time of the first positive crossing of the data sampled at the mid-reference level in the
measurement region.
Cross+ = Tcross
Where Tcross is the horizontal coordinate of the first positive crossing. See Pulse Sources
on page B--57.
The mid-reference level is adjustable and defaults to 50% of the pulse amplitude.
If enabled, measurement gates constrain the measurement region to the area between the Start
Gate (G1) and Stop Gate (G2). By default, searching is forward from the Start Gate for the first
rising edge, but can be reversed, so that searching is backward from the Stop Gate.
Cross- The time of the first negative crossing of the data sampled at the mid-reference level in the
measurement region.
Cross-- = Tcross
Where Tcross is the horizontal coordinate of the first negative crossing.
The mid-reference level is adjustable and defaults to 50% of the pulse amplitude.
If enabled, measurement gates constrain the measurement region to the area between the Start
Gate (G1) and Stop Gate (G2). By default, searching is forward from the Start Gate for the first
falling edge, but can be reversed, so that searching is backward from the Stop Gate.