| 摘要 |
<P>PROBLEM TO BE SOLVED: To lessen the inspection work and inspection time required for inspecting the operation of an FM transmitter. <P>SOLUTION: In response to a transmission instruction from a controller 1, an arbitrary set of FM transmitter apparatus T1-T3 transmits sound signals with radio frequencies different from each other and having a frequency interval dependent on a predetermined inspection standard. FM receivers R0-R4 receive the sound signals transmitted from these FM transmitter apparatus with different radio frequencies, respectively. A switch 3 switches any one of the sound signals transmitted with different radio frequencies selectively and delivers the selected sound signal from a speaker 4 as the output result. <P>COPYRIGHT: (C)2008,JPO&INPIT |
