Tektronix TDS5000B Series, Онлайн руководство пользователя

Страница: 376 / 420

376
Clock Source Channel
Select the input channel that is connected to the clock signal.
Clock Threshold Level
To set the clock threshold voltage level, click Clock Level, and then use the multipurpose knob to
set the voltage level.
Comm Trigger Source
Use the Source drop-down list to select the channel for the comm trigger source. Use the Type
drop-down list to select the clock source for the trigger. Use the Polarity drop-down list to select
the polarity of the clock source.
Control Window Handle
Cos
Inserts the text COS( into the math expression.
Cosh
Inserts the text COSH( into the math expression. The COSH function computes the hyperbolic
cosine of x
Crossing Percent
Crossing percent measurement is the eye crossing point expressed as a percentage of eye height.
Crossing Percent = 100 x [(pCross1Mean - pBaseMean)/(pTopMean - pBaseMean)]
Cycle Area
The cycle area is a voltage over time measurement. The measurement is the area over the first
cycle in the waveform or the first cycle in the gated region expressed in volt-seconds. The area
above the common reference point is positive while the area below the common reference point is
negative.