A transceiver apparatus configured to support antenna selection in accordance with a communications standard, the apparatus comprising: a hardware subsystem comprising: a duplexing component ; a transmitter chain ; a first receiver chain and a second receiver chain respectively comprising a first antenna port and a second antenna port at an upstream end thereof, the first receiver chain and the transmitter chain sharing the duplexing component ; a signal redirection system arranged to couple temporarily the second antenna port to the first receiver chain at a point of entry thereof and in response to an antenna selection instruction, and arranged to redirect temporarily a signal path from the second antenna port into the first receiver chain and then back into the second receiver chain downstream of the point of entry; and a controller arranged to coordinate the temporary redirection of the signal path from the second antenna port into the first receiver chain ; wherein a portion of the first receiver chain comprises receive path amplification and a portion of the second receiver chain also comprises the receive path amplification ; and the apparatus is characterised by : the first receiver chain comprising a first analogue-to-digital converter having a first maximum signal headroom threshold requirement associated therewith, and the controller is arranged to determine whether application of the receive path amplification in respect of the first receiver chain to a first signal received via the second antenna port results in the first maximum signal headroom threshold requirement being exceeded. a hardware subsystem comprising: a duplexing component ; a transmitter chain ; a first receiver chain and a second receiver chain respectively comprising a first antenna port and a second antenna port at an upstream end thereof, the first receiver chain and the transmitter chain sharing the duplexing component ; a duplexing component ; a transmitter chain ; a first receiver chain and a second receiver chain respectively comprising a first antenna port and a second antenna port at an upstream end thereof, the first receiver chain and the transmitter chain sharing the duplexing component ; a signal redirection system arranged to couple temporarily the second antenna port to the first receiver chain at a point of entry thereof and in response to an antenna selection instruction, and arranged to redirect temporarily a signal path from the second antenna port into the first receiver chain and then back into the second receiver chain downstream of the point of entry; and a controller arranged to coordinate the temporary redirection of the signal path from the second antenna port into the first receiver chain ; wherein a portion of the first receiver chain comprises receive path amplification and a portion of the second receiver chain also comprises the receive path amplification ; and the apparatus is characterised by : the first receiver chain comprising a first analogue-to-digital converter having a first maximum signal headroom threshold requirement associated therewith, and the controller is arranged to determine whether application of the receive path amplification in respect of the first receiver chain to a first signal received via the second antenna port results in the first maximum signal headroom threshold requirement being exceeded. <EOS>