VPItransmissionMaker^TMCable Access

Cable access systems offer a ready-made solution to the last mile. However, as services move from broadcast to interactive, infrastructure has to be upgraded. Partitioning the network and adding fiber feeds offers a graceful upgrade strategy. VPItransmissionMaker^TM Cable Access allows the benefits and limitations of fiber in access systems to be explored in detail. Because it combines flexible signal-processiing modules with a substantial library of photonic components, almost any mixed analog and digital access technology can be investigated in great detail.

Applications

• Investigate mixed transmission formats such as baseband digital plus SCM analog plus QAM digital, including upstream path options. Use the extensive library of signal processing modules to simulate novel modulation and demodulation schemes
• Investigate transmitter and modulator performance requirements, including directly modulated laser clipping and memory effects
• Calculate fiber-induced signal degradation including XPM, FWM, Raman, dispersion, multiple reflections and interaction with the source
• Evaluate upstream-data DWDM systems using frequency stacking or high-speed digital-analog conversion
• Identify critical design parameters including dispersion, amplifier gain-tilt, demultiplexer performance, amplifier noise, Rayleigh backscattering and multi-path interference
• Develop antenna-remoting and radar applications, using optical millimeter-wave signal generation, up-conversion and mixing
• Present data as waveforms, eye-diagrams, constellations and spectra (optical and RF). Use industry standard measurement tools for analysis of Q, BER, CTB, CSO, 3-IM and SNR

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