COPYING DEVICE, CONTROL METHOD OF THE SAME, AND STORAGE MEDIUM STORING COMPUTER-READABLE PROGRAM

PROBLEM TO BE SOLVED: To make reducible a radiation noise of a copying machine at a whole without affecting a copying operation, to make reducible the noise counter measures of an unnecessary shield or the like more, to clear the specification of radiation noise and to realize a copying environment which is friendly to an environment. SOLUTION: In the copying device having a device for executing a copying operation, respective controllers individually switch/control the modulation rates of respective SSFG which frequency-modulate clock signals inputted to the respective devices at a prescribed period.