Abstract: A method and apparatus for board-to-board circuit connection. In one example, a connector system includes a printed circuit board having a first set of electrical pads and at least one electrical component positioned between the first set of electrical pads and an adapter frame. The adapter frame includes a second set of electrical pads on a bottom surface and connected to the first set of electrical pads of the printed circuit board and a third set of electrical pads on a top surface and electrically connected to the second set of electrical pads. The adapter frame further includes a chamber configured to house the at least one electrical component and having electrical shielding that forms at least a partial Faraday cage around the at least one electrical component. A connector receptacle having a set of pins is connected to the third set of electrical pads.

Abstract: A wireless communication unit (400) comprises a dual-port modulator for generating a radio frequency signal. A digital to analogue converter (446), operably coupled to a data generator (570), converts digital data to an analogue signal to be used in generating the radio frequency signal. An attenuator (450), operably coupled to the digital to analogue converter (446) attenuates the analogue signal output from the digital to analogue converter (446). A signal processor (402) is operably coupled to the attenuator (450) for setting an attenuation value of the attenuator (450) to balance signals input to the two ports of the dual-port modulator.