A motorized vacuum sander having a vacuum assembly mounted on one end of a body tube and a pivoting sanding head assembly with an angle adjustment mechanism mounted on the other end. In one aspect, the present invention provides a method for transmitting a plurality of digital data streams over an analog microwave link comprising multiplexing the digital data streams, converting the multiplexed data stream into an analog baseband signal and transmitting the baseband signal along with an analog sub-carrier over an analog broadcast network. A control circuit monitoring the contacts maintains the analyte meter in a low power mode until detecting both the test strip and the sample, whereupon the control circuit activates the meter and enables an analog analyte measurement circuit.