| 摘要 |
PURPOSE:To facilitate eccentric compensation, by subtracting an unbalance vector indicating an error during the period of an 0V signal from that obtained by computation of a signal from a pickup to cancel errors in an electric system. CONSTITUTION:A signal from a pickup 12 and a signal of 0V are inputted into a vector computing section 15 separately through a switching section 13 and an input signal preprocessing section 14, and unbalance vector signals 151X and 151Y are inputted into a vector subtraction section 17, which are sent 10 an error vector memory section 16. Then, a signal indicating 0V is inputted and an unbalance vector outputted from the computing section 15 is stored into the memory section 16. The signal from the pickup 12 is sent to a display section 18 by subtracting the unbalance vector containing errors of the memory section 16 from that outputted from the computing section 15. This eliminates errors in an electric system, thereby facilitating work.
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