| 摘要 |
PURPOSE:To record and reproduce a data FM signal and an unmoldulated information signal easily by the same channel by providing a changeover switch and performing recording on the same track of a magnetic tape in time-division transmission mode. CONSTITUTION:A changeover switch 21 composed of an FET responds to a control signal supplied from a control line 22 to connect an audio signal output line 20 and a data FM wave output line 15 to a common output line 23 by turns. Namely, this switch 31 makes selective connections so that a memorandum announcement audio signal is transmitted when a data FM wave is not transmitted. Therefore, a recording and reproduction part 24 records the data FM wave and an unmodulated information signal on the same track of a magnetic tape 28 in time-division mode. As a result, the reproduction data FM wave and reproduced unmodulated information signal appear on a reproduction output line 36 by turns in time-division transmission mode. This constitution records the reproduces the data FM signal and unmodulated information sgnal easily by the same channel. |
