TDS5000B Online Programmer Guide
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H CRMs
This measures the true Root Mean Square voltage over the first cycle
in the waveform or the first cycle in the gated region.
H DELay
This measures the time between the middle reference (default = 50%)
amplitude point of the source waveform and the destination wave-
form.
H DISTDUty
The duty cycle distortion measures the time between the falling edge
and the rising edge of the eye pattern at the mid reference level.
It is the peak--to--peak time variation of the first eye crossing mea-
sured at the mid--reference as a percent of the eye period.
H EXTINCTDB
This (optical waveform (eye diagram) measurement) measures its
extinction ratio. Extinction Ratio (dB) measures the ratio of the aver-
age power levels for the logic High to the logic Low of an optical wa-
veform and expresses the result in dB.
This measurement only works for fast acquisition signals or a refer-
ence waveform saved in fast acquisition mode.
Extinction dB = 10 X (log 10 (High / Low)
H EXTINCTPCT
This (optical measurement) measures the extinction ratio of the se-
lected optical waveform. Extinction Ratio (%) measures the ratio of
the average power levels for the logic Low (off) to the logic (High)
(on) of an optical waveform and expresses the result in percent.
This measurement only works for fast acquisition signals or a refer-
ence waveform saved in fast acquisition mode.
Extinction % = 100.0 x (Low / High)
H EXTINCTRATIO
This (optical measurement) measures the extinction ratio of the se-
lected optical waveform. Extinction Ratio measures the ratio of the
average power levels for the logic High to the logic Low of an optical
waveform and expresses the result without units.
This measurement only works for fast acquisition signals or a refer-
ence waveform saved in fast acquisition mode.
Extinction Ratio = (High / Low), ratios greater than 100 or less than 1
generate errors; low must be greater than or equal to 1 microwatt.
H EYEHeight
This measures the vertical opening of an eye diagram in volts.
H EYEWidth
This measures the width of an eye diagram in seconds.
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