Test instrument delivers pulse and noise generation Product News 1/30/2008 Post a comment Agilent Technologies claims to introduce the industry's first pulse function arbitrary noise generator, which is said to provide superior signal quality combined with versatile waveforms for general-purpose bench tests or advanced serial data stress tests.
Measuring HD performance with Tektronix' Picture Quality Analyser and other tools Design How-To 1/25/2008 Post a comment While the quality of analog and full-bandwidth digital video can be characterised indirectly by measuring the distortions of static test signals, compressed television systems pose a far more difficult challenge. Picture quality in a compressed system can change dynamically based on a combination of data rate, picture complexity, and the encoding algorithm employed.
Optical analyzers extend reach Design How-To 1/21/2008 Post a comment No radio engineer would think of doing without a spectrum analyzer, but developers working in the electromagnetic spectrum's optical range have had little choice.
Measuring video quality: Can objective metrics match human eyes? Design How-To 1/4/2008 Post a comment Can objective metrics replace the "gifted" human eye when evaluating video quality? In short -- no -- but they have an important purpose. Subjective video analysis is costly, time consuming, and difficult to repeat. Objective metrics act as important evidence, while subjective analysis provides the confirmation.
As data rates begin to move beyond 25 Gbps channels, new problems arise. Getting to 50 Gbps channels might not be possible with the traditional NRZ (2-level) signaling. PAM4 lets data rates double with only a small increase in channel bandwidth by sending two bits per symbol. But, it brings new measurement and analysis problems. Signal integrity sage Ransom Stephens will explain how PAM4 differs from NRZ and what to expect in design, measurement, and signal analysis.
January 2016 Cartoon Caption ContestBob's punishment for missing his deadline was to be tied to his chair tantalizingly close to a disconnected cable, with one hand superglued to his desk and another to his chin, while the pages from his wall calendar were slowly torn away.122 comments