TDS5000B Online Programmer Guide
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H MEDian
This (histogram measurement) measures the middle point of the histo-
gram box. Half of all acquired points within or on the histogram box
are less than this value and half are greater than this value.
H MINImum
This amplitude measurement finds the minimum amplitude. This val-
ue is typically the most negative peak voltage. It is measured over the
entire waveform or gated region.
When histogram is selected with the MEASUrement:METHod com-
mand, the minimum measurement measures the lowest nonzero bin in
vertical histograms or the time of the leftmost nonzero bin in the hori-
zontal histograms.
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)]