Formation method and parusudochiyapureda device null of parusudochiyapureda transmission

摘要

PURPOSE:To substantially reduce generation of spurious component in a transmit radio wave by switching a hourly smoothly repeated signal as a modulation signal of the transmit radio wave to a short form wave signal synchronized with the repeated signal. CONSTITUTION:A sine wave (a) outputted from a sine wave generator 1, a clock pulse (b) synchronized with this, and a logical product (f) of a first transition detection signal (k) having delay of half-clock for driving a one bit random number generator and a last transition detection signal (e), control a switch circuit 7 to select the sine wave and one bit random number signal. When the output signal (g) is used as a modulation signal of transmit signal, the amplitude is changed smoothly at the time of transmission-receiving switching. When the one bit random number signal having delay of half-clock is used as a transmission-receiving switching signal (i), the previously obtained transmit radio wave is not outputted in a period of receiving. Thus, any spurious component in the transmit radio wave generated by modulation can be substantially reduced.