An FIR filter of a DS-CDMA UWB modem transmitter and a control method thereof are disclosed. The bracket comprises a base connected with a wire frame having an upper and lower element. The first side face 1a and polished surface 6 are intersected at an obtuse angle \u03b8, and the second side face 1b and light scattering surface 5 are intersected at an obtuse or right angle \u03b1. The fastener is then pivoted to change its orientation. The laser beam collects radio frequency energy for use by the electronic medium. This invention provides means to locally execute an APDU script and collect APDU responses locally for batch transfer to a remote server.