| 摘要 |
PURPOSE:To prevent same fading from being generated even when power supplies are applied simultaneously in the case of an experiment through the use of plural simulators by providing a means varying an initial value of a PN signal and a means displaying the initial value or its relating data to the simulator. CONSTITUTION:A multiplier 13 takes exclusive OR to signals selected from outputs of R1-RN stages of N-stages of a shift register circuit 11 and the result is fed back to an input of the stage R1. An input signal to the stage R1 in the shift register circuit 11 is used as an output of a PN(pink noise) circuit. A preset circuit 12 connects to the shift register circuit 11 and a preset value is externally inputted to an input terminal 16 of the preset circuit 12 and the preset value is displayed on a display circuit 14. Since the shift in a PN series differs from a different preset value, generated fading is differentiated. Thus, in the case of the experiment through the use of plural simulators, when power supplies are applied at a same time, same fading is not caused. |
