Rohde & Schwarz RTP044 - Page 1389

Remote control commands
R&S
®
RTP
1389User Manual 1337.9952.02 ─ 12
For a detailed description, see Chapter 8.2.6.1, "Overview of eye diagram measure-
ments", on page 366.
Table 22-7: Eye diagram measurements
<MeasType>
parameter value
(remote control)
Measurement (man-
ual operation)
Description/Result Suffix
<n>
not used 1
ERPercent Extinction ratio (%) Eye base / Eye top *100
Prerequisite: Eye base > 0 and Eye top > 0
2
ERDB Extinction ratio (dB) 10*log (Eye top / Eye base) 3
EHEight Eye height Vertical eye opening 4
EWIDth Eye width Horizontal eye opening 5
ETOP Eye top Mean of the upper vertical histogram 6
EBASe Eye base Mean of the lower vertical histogram 7
not used 8...9
QFACtor Q factor (Eye top – Eye base) / (σtop + σbase) 10
not used 11...13
RMSNoise Noise (RMS) Quadratic mean of the noise of eye top and eye
base
14
SNRatio S/N ratio Signal-to-noise ratio
10 * log (Eye amplitude / Noise RMS)
15
DCDistortion Duty cycle distortion 20 * log (Eye amplitude / Noise RMS) 16
ERTime Eye rise time Duration for signal to rise from 10% to 90% of the
high signal level
17
EFTime Eye fall time Duration for signal to fall from 90% to 10% of the
high signal level
18
EBRate Eye bit rate Frequency between two crossings 19
EAMPlitude Eye amplitude Eye top - Eye base 20
not used 21...27
PPJitter Jitter (peak to peak) Average of the jitter for both crossing points
(σcrossing1 + σcrossing2) / 2
28
STDJitter Jitter (6*σ) Jitter *6 29
RMSJitter Jitter (RMS) Quadratic mean of the jitter at both crossing points 30
MEASurement<m>:EYEJitter:AUToscale........................................................................1390
MEASurement<m>:EYEJitter:LCHeck<n>:VALid.............................................................1390
MEASurement<m>:EYEJitter:LCHeck<n>:LOWer:LIMit................................................... 1390
MEASurement<m>:EYEJitter:LCHeck<n>:UPPer:LIMit....................................................1390
MEASurement<m>:EYEJitter:LCHeck<n>:LOWer:MARGin..............................................1391
MEASurement<m>:EYEJitter:LCHeck<n>:UPPer:MARGin...............................................1391
Automatic measurements