TDR scope analyzes 12.5-Gbps data paths
Staff -- Test & Measurement World, 11/1/2006 2:00:00 AM
When characterizing signal paths of multigigabit serial data paths, digital designers have had to move from using time-domain reflectometers (TDRs) to using more expensive vector network analyzers (VNAs). Recognizing that trend, Tektronix developed the DSA8200 digital signal analyzer that characterizes paths for digital data streams up to 12.5 Gbps. This sampling scope with a TDR function boasts 15-ps reflected TDR rise time, 50-GHz TDR and S-parameter measurements, and a 600-µV noise floor at 50 GHz. The company says the instrument is less expensive than a VNA and enables you to set up and perform measurements faster.
The DSA8200 consists of a mainframe and slots for four differential optical and electrical pairs. Two TDR heads reside at the end of 2-m cables that connect to the plug-in modules. Thus, you can keep the TDR head close to your DUT, and you can characterize up to four differential pairs. Sampling modules are also available.
Because the DSA8200 is a Windows-based instrument, you can use the company’s IConnect software to measure return loss, reflections, eye diagrams, jitter, and crosstalk. A command-line interface lets you automate measurements through scripts.
Base prices: DSA8200 mainframe—$20,900; TDR modules—$27,100; sampling modules—$22,000; IConnect software packages—$7900. Tektronix, www.tektronix.com.
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