| 摘要 |
PURPOSE:To decrease remarkably a preheat time of a transmitter by supplying individually a power supply to a low frequency section and a high frequency section respectively. CONSTITUTION:The inside of a transmitter is separated into a low frequency section l and a high frequency section 2 and power supply siwtches Sw1,Sw2 applying power individually respectively are provided. While the preheat time of the low frequency section l is longer normally as 1000-1600 msec, that of the high frequency section 2 is short as 30-80msec. Thus, the power swich Sw1 is applied at a prescribed time before the data transfer timing is inputted to preheat the low frequency section l in advance thereby reducing remarkably the transmission preheat time.
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