An Operational Description
The RF mouse transmitted by use FSK (Frequency Shift Key) radio frequcy technology to operate a special designed receiver which associated with an
IBM compatible PC. The FSK Technology is a kind of FM modulation. The modulation depth was designed by the manufacture, such as + 3KHz that
means the series digital data 0 or 1 were transnitted as carrier frequency minus 3 KHz or plus 3KHz. In the block diagram locatin A (please refer to the
next page) which was series digital data as usual. The location B was modulated by FSK. And then the carrier frequency was slected by a switch.
