| 摘要 |
PURPOSE:To attain mutual communication without executing the change-over of a switch at the time of transmitting and receiving by causing the carrier frequencies of stereo right and left channels to be different. CONSTITUTION:The communication is executed in a 20A side composed of tape recorder devices 21A and 22A, and a 20B side composed of tape recorder devices 21B and 22B. In such a case, tape and microphone changing-over switch 23A and 23B in the 20A side and 20B side are set to a microphone MIC side. Then, a transmitting channel changing-over switch 24A in the 20A side is set to a left channel L and a transmitting channel changing-over switch 24B in the 20B side is set to a right channel R respectively. A sound signal from a microphone 25A in the 20A side is FM-modulated by a carrier frequency fL and a sound output is obtained in the headphone of the left channel in the receivers 22A and 22B. A sound signal from a microphone 25B in the 20B side is FM-modulated by a frequency fH and the sound output is obtained in the headphone of the right channels in the receivers 22A and 22B. |
