The Agilent 89600 series PC-based vector signal analyzers (VSAs) are noted for their cutting-edge digital signal processing features, particu- larly for emerging communications standards. You can take advantage of these features by using your own downconverter to provide an IF signal at a nominal 70 MHz to the 89611A. The 89611A performs digiti- zation of the IF signal and signal recording, and its software gives you full access to a wide range of vector signal analysis tools.