TDS5000B Online Programmer Guide
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H NCROss
This (timing measurement) measures the time from the trigger point
to the first falling edge of the waveform or gated region. The distance
(time) is measured at the middle reference amplitude point of the sig-
nal.
H NDUty
The negative duty cycle is the ratio of the negative pulse width to the
signal period, expressed as a percentage. The duty cycle is measured
on the first cycle in the waveform or gated region.
Negative Duty Cycle = (Negative Width) / Period * 100%
H NOVershoot
The negative overshoot amplitude measurement finds the negative
overshoot value over the entire waveform or gated region.
Negative Overshoot = (Low – Minimum) / Amplitude * 100%)
H NWIdth
The negative width measurement is the distance (time) between the
middle reference (default = 50%) amplitude points of a negative
pulse. The measurement is made on the first pulse in the waveform or
gated region.
H PBASe
This measures the base value used in extinction ratio measurements.
H PCROss
This (timing measurement) measures the time from the trigger point
to the first positive edge of the waveform or gated region. The dis-
tance (time) is measured at the middle reference amplitude point of
the signal.
H PCTCROss
The crossing percent (optical measurement) measures the location of
the eye crossing point expressed as a percentage of EYEHeight.
Crossing percent = 100 * [(eye--crossing--point – PBASe)/(PTOP –
PBASe)]
H PDUty
The positive duty cycle is the ratio of the positive pulse width to the
signal period, expressed as a percentage. It is measured on the first
cycle in the waveform or gated region.
Positive Duty Cycle = (Positive Width)/Period * 100%
H PEAKHits
This (histogram measurement) measures the number of points in the
largest bin of the histogram.
H PERIod
This timing measurement is the time required to complete the first
cycle in a waveform or gated region. Period is the reciprocal of fre-
quency and is measured in seconds.
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