Equalization Processing
Software
The PatternVu option adds four powerful
components to the BERTScope Analyzer for the analysis of
PRBS and user patterns:
CleanEye averages
waveform data to present an eye diagram with the non data
dependent jitter removed. This allows the user
to view and measure data dependent jitter such as Inter
Symbol Inference, giving an intuitive idea of the compensatable
jitter present, for example. It is effective on any
repeating pattern up to 32,768 bits long.
The Single
Value Waveform Export utility converts
the CleanEye output to an export file in Comma Separated
Vector (CSV) format. The
output file, of up to 105 bit
points, can be exported into Microsoft Excel or software
analysis and simulation tools such as Stat-Eye or MatLab.
This allows offline filtering of real captured data
and the implementation of standards-based processing
such as Transmitter Dispersion Penalty (TWDP) required
by 802.3aq, the recent Long Reach MultiMode (LRM) 10
Gigabit Ethernet standard.
The FIR Filter equalization processor
allows the emulation of the communication channel to
view and measure the eye as the detector in the receiver
would, by applying a software linear filter to the data
before it is displayed.
The filter characteristics are controlled
by entering the individual weighting coefficients of
a series of taps in the FIR (Finite Impulse Response) filter. Up
to 32 taps can be programmed to allow fine resolution
of the filter shape, and it can be applied to repeating
patterns up to 32,768 bits long.
Single Edge Jitter
Measurement allows truly deep BER based jitter
measurements to be applied to individual data edges
above 3 Gb/s
for the first time. The Jitter Peak measurement function
enables computation of jitter on a single edge in
the pattern, selected by the user. The resulting
jitter measurement excludes data-dependent effects,
showing only the uncorrelated jitter components
such as Rj, Buj, and Pj.
The PatternVu equalization processor
option is available on any BERTScope analyzer.
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