| 摘要 |
PURPOSE:To prevent the input impedance at an input terminal from being disordered even when a distribution output terminal is opened because it is not used by dividing and applying a source voltage which is supplied from an indoor unit to an outdoor unit to the anodes of two diodes of a switch part. CONSTITUTION:The output of either of converters for horizontal polarization and vertical polarization appear at the distribution output terminal 31 of the switch part 52 according to the control state of a control terminal part 32. For example, both or either of terminals 31 and 33 is put in an open state because the indoor unit is not connected. In this case, terminals 32A and 32B of the switch part 52 are opened and a terminal 31 is also opened, but the source voltage for the outdoor unit is divided and applied to the anodes of the diodes D31 and D41 as a voltage of about 5V. Consequently, the diodes D31 and D41 of the switch part 52 turn on and input terminals 14H and 14V are therefore terminated, thereby stabilizing the input impedance. |
