WaveExpert Series Sampling Oscilloscopes

WaveExpert 100H

• Fast eye pattern measurements
• Available 100 GHz sampling module for measurements beyond 40 GB/s
• Pattern locking feature of HCIS enables analysis of PRBS23 waveforms
• Channel equalization using Eye Doctor feature
• RZ and NRZ measurments
• Built-in optical measurements such as Extinction Ratio, OMA, etc.

Fast eye pattern measurements acquire millions of samples in seconds compared to minutes or hours on conventional sampling scopes. WaveExpert comes standard with a complete set of compliance masks and measurements.

Long test patterns are used to analyze the affects of channel distortions such as dispersion in optical fibers. The XXL memory option in the WaveExpert provides up to 510 M samples of waveform storage which can be viewed and analyzed on-screen. The fast acquisition rate provided by the CIS timebase acquires a complete PRBS23 pattern in less than one minute. The analysis shown here is using the WaveScan feature to find the 20 fastest and slowest rise time edges in a PRBS23 pattern.

Eye patterns remain one of the most important measures of signal quality in optical systems. In the past, designers were forced to use small statistical samples for this measurement, but the WaveExpert oscilloscope’s fast coherent timebase provides a level of throughput rivaled only by bit error rate test systems. Eye patterns consisting of millions of samples can be measured in seconds, thus providing the highest level of accuracy and repeatability for a complete range of eye-based measurements such as extinction ratio, modulation amplitude, eye height and eye width. With its fast acquisition, the WaveExpert oscilloscope performs the most accurate eye jitter measurements, without the timebase drift problems present in standard equivalent-time scopes.

Telecom and datacom technologies are at 40 Gb/s in deployed systems, and 80 Gb/s and beyond in the lab. Measuring signals at these rates is pushing the limits of test equipment technology. The WaveExpert oscilloscope with its industry-leading 100 GHz bandwidth is up to the challenge. The fast acquisition, deep memory, and low jitter of the HCIS timebase provide an unprecedented level of waveform analysis. Complex measurements such as dispersion penalty, and processing functions such as equalization, are possible for the first time on pattern lengths as long as PRBS23. A complete set of optical and electrical plug-in modules provides coverage of all current and emerging standards.

The high measurement throughput of the HCIS timebase provides the highest analysis depth of any oscilloscope. This plot shows probability of capturing 10 mask violations as a function of measurement time. The WaveExpert requires less than 15 seconds to guarantee this measurement while a conventional sampling oscilloscope requires over 4 minutes.

An available 100 GHz bandwidth electrical sampling module enables measurements beyond 40 Gb/s. This image shows the time domain pulse from a femto-second laser and the FFT of the pulse. The HHI C05-W-22 100 GHz photodiode was used with the SE-100 sampling head to acquire the signal. The right grid scale is 20 GHz/div horizontally and 6 dB/div (3 dB/div optical).