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Analyzing wavef

orms

Histogram measurements (cont.)

Measurement Description

Mean ±2 Std Dev Displays the percentage of points in the histogram that are within two standard deviations of the

histogram mean.

Mean ±3 Std Dev Displays the percentage of points in the histogram that are within three standard deviations of

the histogram mean.

Communication measurements

Measurement Description

Ext Ratio

The ratio of eye top to base. This m easurement only works for waveform database or a reference

waveform saved in waveform database mode.

Ext Ratio % The ratio of eye top to base expressed as a percentage. This measurement only works for

waveform database or a reference waveform saved in waveform database mode.

Ext Ratio (dB) The ratio of eye top to base expressed in decibels. This measurement only works for waveform

database or a reference waveform saved in waveform database m ode.

Eye Height

The measurement of the eye height in volts.

Eye Width

The measurement of eye width in seconds.

Eye Top The top value used in the extinction ratio measurements.

Eye Base The base value used in the extinction ratio measurements.

Crossing % The eye crossing point expressed as a percentage of eye height.

Jitter P-P

The peak-to-peak value for the edge jitter in the current horizontal units.

Jitter RMS The RMS value of the edge jitter in the current horizontal units.

Jitter 6 Sigma Six times the RMS value of the edge jitter in the current horizontal units.

Noise P-P

The peak-to-peak value of the noise of the top or base of the signal as speciﬁed by you.

Noise RMS The RMS value of the noise of the top or base of the signal as speciﬁed by you.

S/N Ratio The ratio of the signal amplitude to the noise of the top or base of the signal as speciﬁed by you.

Cyc Distortion The peak-to-peak time variation of the ﬁrst eye crossing measured at the Mid Ref as a percent of

the eye period.

Q-Factor The ratio of eye size to noise.

120 MSO/DPO70000DX, MSO/DPO70000C, DPO7000C, and MSO/DPO 5000B Series U ser M anual

Tektronix DPO7054C User Manual

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