Tektronix CSA7154, User Manual

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Appendix B: Automatic Measurements Supported
B- 4
CSA7000 Series, TDS7000 Series, & TDS6000 Series Instruments User Manual
Table B- 1: Mask measurements and their definition (optional on TDS7000 Series & TDS6000 Series)
Name Definition
Ext Ratio The ratio of eye top to base. y p
Ext Ratio = PTop
mean
/PBase
mean
Extinction Ratio % The ratio of eye base to top in %. y p
Ext Ratio % = 100*(PBase
mean
/PTop
mean
)
Extinction Ratio dB The ratio of eye top to base in dB Extinction Ratio dB The ratio of eye top to base in dB.
Ext Ratio dB = 10*Log(PTop
mean
/PBase
mean
)
Eye Height The eye height in watts or volts. y g y g
Eye Height = (PTop
mean
-- 3*PTop
sigma
) -- (PBase
mean
+ 3*PBase
sigma
)
Eye Width The eye width in seconds. y y
Eye Width = (TCross2
mean
-- 3*TCross2
sigma
) -- (TCross1
mean
+ 3*TCross1
sigma
)
Crossing % The eye crossing point as a percentage of eye height.
Crossing % = 100*[(PCross1
mean
-- PBase
mean
)/(PTop
mean
-- PBase
mean
)]
Eye Top The top of the eye.
Eye Base The base of the eye.
Jitter Pk- Pk The peak-to-peak value for the edge jitter in the current horizontal units. p p g j
Jitter PP = TCross1
PP
Jitter RMS The RMS value of the edge jitter in the current horizontal units.
Jitter RMS = TCross1
sigma
Jitter 6
σ
6 x (Jitter RMS)
Noise Pk-Pk The peak-to-peak value of the noise of the top or base of the signal as specified by the
user.
user.
Noise Pk--Pk = PTop
pk--pk or
PBase
pk--pk
Noise RMS The RMS value of the noise of the top or base of the signal as specified by the user. p g p y
Noise RMS = PTop
sigma or
PBase
sigma