User manual

Remote Control
R&S
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RTO
550User Manual 1316.0827.02 ─ 06
16.2.9.4 Eye/Jitter Measurement
The following table lists the measurement suffixes and the <MeasType> parameter value
with a short description.
For a detailed description, see chapter 5.2.1.3, "Eye/Jitter Measure-
ments", on page 136.
Table 16-15: Eye/jitter measurement types
Meas.
suffix
<MeasType>
parameter value
Meas. type Description/Result
1 not used
2 ERPercent Extinction ratio (%) Top level / Base level in percent
3 ERDB Extinction ratio (dB) Top level / Base level in dB
4 EHEight Eye height Vertical eye size
5 EWIDth Eye width Horizontal eye size
6 ETOP Eye top Upper reference level
7 EBASe Eye base Lower reference level
8...9 not used
10 QFACtor Q factor
(V
top
– V
base
)/(σ_top + σ_base)
11...13 not used
14 RMSNoise Noise (RMS) Average of top and base deviation
15 SNRatio S/N ratio Signal-to-Noise Ratio
16 DCDistortion Duty cycle distortion Eye Rise Time / Eye Fall Time
17 ERTime Eye rise time Duration for signal to rise from 10% to 90%
18 EFTime Eye fall time Duration for signal to fall from 90% to 10%
19 EBRate Eye bit rate Frequency between two crossings
20 EAMPlitude Eye amplitude V
top
-V
base
21...27 not used
28 PPJitter Jitter (peak to peak) Average of the jitter for both crossing points.
29 STDJitter Jitter (6*σ) Jitter *6
30 RMSJitter Jitter (RMS) Average deviation of the time from the virtual crossing
point.
MEASurement<m>:EYEJitter:LCHeck<n>:VALid...............................................................551
MEASurement<m>:EYEJitter:LCHeck<n>:LOWer:LIMit.....................................................551
MEASurement<m>:EYEJitter:LCHeck<n>:UPPer:LIMit......................................................551
MEASurement<m>:EYEJitter:LCHeck<n>:LOWer:MARGin................................................551
MEASurement<m>:EYEJitter:LCHeck<n>:UPPer:MARGin.................................................551
Command Reference