When converters are used in an I/Q pair, the I channel always uses the even block numbers, and the Q channel always uses the odd block numbers. For example, in a Dual RF-ADC tile, the I RF-ADC is block0, and the Q RF-ADC is block1. For Quad RF-ADC tiles, or RF-DAC tiles, the I channels are block0 and block2, while the related Q channels are block1 and block3, respectively.