| 摘要 |
<p>PURPOSE:To constitute a system-up AV equipment group by providing each AV equipment with the function which monitors the presence or the absence of a control signal on a bus line and temporarily holds the output of the control signal. CONSTITUTION:A signal presence/absence detecting part 16 on the bus line always monitors whether the waveform on the bus line is not changed for a certain time or longer or not to transmit the result to a command part 13 as an output stop command. Consequently, the signal on a connection line connected to a system terminal 15 can be detected, and it is detected that the other AV equipment 2 to 4 use the system terminal 15 to output the control signal; and when the other AV apparatus 2 to 4 issue commands, the AV equipment waits for the end of their control and outputs its own control signal thereafter. Thus, two or more AV equipment can be connected, and AV equipment of high operability which are systematized furthermore are obtained.</p> |
