The ISL5217 Quad Programmable UpConverter (QPUC) is a QASK/FM modulator/FDM upconverter designed for high dynamic range applications such as cellular basestations. The QPUC combines shaping and interpolation filters, a complex modulator, and timing and carrier NCOs into a single package. Each QPUC can create four FDM channels. Multiple QPUCs can be cascaded digitally to provide for up to 16 FDM channels in multi-channel applications.