Jitter analysis and clock data recovery
R&S
®
RTO6
1101
User Manual 1801.6687.02 ─ 05
Measurement
Abbrevia-
tion
Description
Resu
lts
Diagram
S
t
D
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a
p
/a
b
s
H
is
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o
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T
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Eye height @BER
(3)
EH@BER
Returns the vertical eye opening at the user-
defined BER.
x
Random plus
(other) bounded
uncorrelated noise
RN+
(O)BUN
Random noise plus (other) bounded uncorrelated
noise or (other) bounded uncorrelated noise is the
combined effect of both noise types.
If periodic components are activated RN + OBUN
are displayed, otherwise RN + BUN.
RN + (O)BUN is typically used, if track or spec-
trum plots are desired. Both plots are not availa-
ble for RN only or (O)BUN only components as
the time dependencies of these noise types are
unknown. RN + (O)BUN spectrum is a useful
approximation of the RN spectrum for negligible
small (O)BUN.
x
x
x
x
x
Total noise
TN
Measures the total level error of the input signal.
It is defined as the amplitude deviation between
the amplitude of the input signal at the decision
time point and its corresponding reference level.
x
x
x
x
x
Deterministic noise
DN
The reproducible portion of the overall level error
of the input signal. It consists of the data-depend-
ent noise, the periodic noise components and the
other bounded uncorrelated jitter components.
x
x
x
Data-dependent
noise
DDN
Consists of inter-symbol interface noise and level
distortion. It depends on the symbol sequence.
ISIN is an effect whereby past symbols have an
influence on future symbols.
DCD is a mismatch between rising and falling sig-
nal transitions due to reference level mismatch or
other imbalances between transitions.
x
x
x
x
x
Level distortion
(3)
LD
A measure of imbalance between different sym-
bol levels. It is defined as the difference between
the average level errors of the symbols one and
zero.
x
Periodic noise
(2)
PN
Periodic noise is typically caused by crosstalk
from periodic signal sources to the transmitter or
transmission line. It represents the harmonic por-
tion of the overall level error.
x
x
x
x
x
(1)
(2)
> "Enabled".
(3)
No results available, if "Levels" is set to "Rising"/"Falling".
Advanced jitter and noise (option R&S
RTO6- K133/K134)
