Tektronix TDS5000B Series, Онлайн руководство пользователя, Страница: 377 / 420

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Cycle Mean
This voltage measurement is the arithmetic mean over the first cycle in the waveform or the first
cycle in the gated region.
Cycle RMS
This voltage measurement is the true Root Mean Square voltage over the first cycle in the
waveform or the first cycle in the gated region.
Data Source Channel
Select the input channel that is connected to the data signal.
Data Threshold Level
To set the data threshold voltage level, click Data Level, and use the multipurpose knob to set the
voltage level.
Dead Time
Dead time is the time that the instrument requires to process an acquisition. The instrument cannot
acquire any new data until the previous data has been processed. If dead time is long, the
instrument can miss acquiring infrequent events.
"Dead time" Between Acquisitions
Delay
This timing measurement is the time between the mid reference (default 50%) amplitude point of
two different waveforms.
Delay Edges
The Delay Edge buttons determine whether the measurements will be taken on the rising or falling
edge of the waveform. After selecting an edge, the graphic in the control window is updated to
show the edge from which the measurements will be taken.
Derivative
Inserts the text DIFF( ) into the math expression. Enter an argument to the function. The derivative
function produces the derivative of the argument.
Duty Cycle Distortion
Duty cycle distortion is the peak-to-peak time variation of the first eye crossing measured at the
MidRef as a percent of the eye period.
DCD(sec) = 100% x TDCDp-p/(TCross2mean – TCross1mean)