The AFE840x is a multichannel communications signal processor that provides analog-to-digital conversion and digital downconversion optimized for cellular base transceiver systems. The AFE8405 and AFE8406 both support UMTS, CDMA-1X and TD-SCDMA air-interface cellular standards. The AFE8405 provides up to 8 UMTS digital downconverter channels (DDC), 16 CDMA DDCs, or 16 TD-SCDMA DDCs. The DDC channels are independent and operate simultaneously. The AFE8405 has two input ports: one is hardwired to an internal 14-bit analog-to-digital converter and the other is a 16-bit digital input. Each DDC channel can be programmed to accept data from any one of the two input ports. The AFE8406 provides up to 8 UMTS digital downconverter channels (DDC), 16 CDMA DDCs, or 16 TD-SCDMA DDCs. The DDC channels are independent and operate simultaneously. The AFE8406 has four input ports: two are hardwired to internal 14-bit analog-to-digital converters and two are 16-bit digital inputs. Each DDC channel can be programmed to accept data from any one of the four input ports. The AFE8405 and AFE8406 SEK's are a set of hardware and software tools designed to ease the AFE840x evaluation. This guide provides a step-by-step description on how to set up the AFE840x system solution.