Multiple bands enable one RF-DAC or RF-ADC analog channel and share multiple DUC or DDC channels to transmit or receive the multi-band carrier signals. For RF-DAC, multiple baseband signals can be up-converted in separate DUC chains and then combined at the crossbar before being sent to the analog RF-DAC block.
In RF-ADC, the multi-band/carrier inputs from one RF-ADC are split into multiple DDC paths for down-conversion. The carriers from different bands are separated and located at low frequencies (in general at zero). In the multi-bands operation, a converter is enabled on channel 0 (dual bands at channel 0 and 1) or channel 2 (dual bands at channel 2 and 3). Multi-bands operations support both real and complex output. All these configurations can be enabled at the crossbar page. The following figure illustrates the dual bands configuration of C2C and C2R.
