SPURPLOT

This graphical analysis software aims to help the user choose the frequency plan, mixer and filter criteria necessary for frequency translation, and allows the tuning of these parameters according to frequency specifications. It includes tunable and reusable 10 x 10 mixer intermodulation tables that define the mixer type, local oscillator (LO) power levels, adjustable lowpass, highpass, bandreject, or bandpass filters, each with Butterworth or Tchebychev characteristics, tunable filter parameters including centre of comer frequency, bandwidth, ripple, notch depth, out-of-band attenuation, and 1-30 pole selectivity.