Inventors:
James R. WASCHURA - Los Altos CA, US
Senthil Kumar THANDAPANI - San Jose CA, US
Timothy E. SAUERWEIN - Portland OR, US
Assignee:
TEKTRONIX, INC. - Beaverton OR
International Classification:
H04B 1/04
Abstract:
Embodiments of the present invention provide a variable inter symbol interference generator that generates a data signal having a variable amount of inter symbol interference by passing a data signal through (1) a programmable filter having an adjustable frequency response, and through (2) a fixed filter having a fixed frequency response such as a PCB trace, a length of cable, a discrete filter, or the like. By adjusting the parameters and therefore the insertion gain or loss of the programmable filter, and combining this with one or more fixed filters, a large range of continuously variable and finely tunable inter symbol interference amounts can be easily generated.
