Tektronix, Inc. P6240, Руководство пользователя

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Measuring Waveforms Automatically
TLS 216 User Manual
3–69
Table 3–3: Measurement Definitions (Cont.)
Name Definition
Frequency Timing measurement for the first cycle in the waveform or gated region. The reciprocal of the period.
Measured in Hertz (Hz) where 1 Hz = 1 cycle per second.
High The value used as 100% whenever High Ref, Mid Ref, and Low Ref values are needed (as in fall
time and rise time measurements). Calculated using either the min/max or the histogram method.
The min/max method uses the maximum value found. The histogram method uses the most
common value found above the mid point. Measured over the entire waveform or gated region.
Hold Timing measurement. The time between the first transition to an illegal state for all waveforms in a
group (except the clock) and the clocking edge of the waveform in the channel specified as the clock.
The clock can be any channel. It does not have to be included in the measured group. Logic levels
are dictated by High Ref and Low Ref.
Low The value used as 0% whenever High Ref, Mid Ref, and Low Ref values are needed (as in fall time
and rise time measurements). May be calculated using either the min/max or the histogram method.
With the min/max method, it is the minimum value found. With the histogram method, it refers to the
most common value found below the mid point. Measured over the entire waveform or gated region.
Maximum Voltage measurement. The maximum amplitude. Typically the most positive peak voltage. Measured
over the entire waveform or gated region.
Mean Voltage measurement. The arithmetic mean over the entire waveform or gated region.
Minimum Voltage measurement. The minimum amplitude. Typically the most negative peak voltage. Measured
over the entire waveform or gated region.
Negative Duty Cycle Timing measurement of the first cycle in the waveform or gated region. The ratio of the negative
pulse width to the signal period expressed as a percentage.
NegativeDutyCycle
+
NegativeWidth
Period
100%
Negative Overshoot Voltage measurement. Measured over the entire waveform or gated region.
NegativeOvershoot
+
Low
*
Min
Amplitude
100%
Negative Width Timing measurement of the first pulse in the waveform or gated region. The distance (time) between
MidRef (default 50%) amplitude points of a negative pulse.
Peak to Peak Voltage measurement. The absolute difference between the maximum and minimum amplitude in
the entire waveform or gated region.
Phase Timing measurement. The amount one waveform leads or lags another in time. Expressed in
degrees, where 360
comprise one waveform cycle.
Period Timing measurement. The time it takes for the first complete signal cycle to happen in the waveform
or gated region. The reciprocal of frequency. Measured in seconds.
Positive Duty Cycle Timing measurement of the first cycle in the waveform or gated region. The ratio of the positive
pulse width to the signal period expressed as a percentage.
PositiveDutyCycle
+
PositiveWidth
Period
100%
Positive Overshoot Voltage measurement over the entire waveform or gated region.
PositiveOvershoot
+
Max
*
High
Amplitude
100%