| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a radio communication device and control method thereof in which processing is automatically performed by solving trouble wherein howling is prevented conventionally by turning on a loop function for only one of communicating parties when operating the loop function for enabling a third person who wants to perform wire tapping of a simultaneous speech, to receive a conversation between both the communicating parties but when starting communication, complicated operation of determining and setting which one of the communicating parties is to turn on the loop function is required, therefore and further when the third person performs wire tapping of reception, the third person does not know a transmission frequency to perform wire tapping on and can not immediately specify a reception frequency. <P>SOLUTION: A radio communication device comprises a loop function for performing a simultaneous speech with frequencies f1, f2 different from each other as transmission and reception frequencies and mixing a reception signal with a modulation signal of a transmission unit as needed. The radio communication device is configured or controlled so that a radio communication device on a calling side, on a called side, on a predetermined side, or on a side using a predetermined frequency as a transmission frequency, turns on the loop function, and a radio communication device on the other side turns off the loop function. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
