combined – each TRU contains 2 TRX so in combined mode the 2 TRX connect to the CDU on 1 cable, this is used for configuration above 2,2,2 but u will have loss using the hybrid combiner so less coverage but greater capacity
uncombined – there are 2 separate cables connecting the TRU (2 TRX) to the CDU so max configuration will be 2,2,2 but no loss so greater coverage but less capacity