force AT to retune to another DO carrier

firs: How to force an AT to retune to another DO carrier?.

Second:in huawei documentation states this “the AT
performs the “AND” calculation using the negotiation parameter AccessHashingClassMask
and the AccessHashingChannelMask of all frequencies, and selects the frequencies that
have the most “1” in the results of the “AND” calculation as the set of available frequencies.
In this way, different ATs can camp on different frequencies.”

need example how the access hash channel mask ‘AND’ is performed.