 The best bit error ratio (BER) is obtained when the samples are taken as far away as possible from any data stream transitions.While most oversampling designs using a counter employ a sampling clock frequency that is an even multiple of the data stream, an odd multiple is better able to create a sampling point further from any data stream transitions and can do so at nearly half the frequency of a design using an even multiple.In oversampling type CDRs, the signal used to sample the data can be used as the recovered clock.