| 摘要 |
A wireless telephone 27 MHz uses that frequency as a support. Therein built is a synchronic-impulse, with a binary code of the called telephone and our telephone. Synchronic impulse is at the frequency of 250 KHz, while the binary code is at 100 KHz. Synchronic-impulse and the binary code are built-in 500 KHz, and the speaking frequency of 20 KHz, and all that is once mixed in a mixer and sent to the carrying frequency of 27 KHz. Once we dial the number of a private owner, the synchronic-impulse of our phone goes together with the binary code of his telephone, then synchronic-impulse of our phone then binary code of our phone. Time between two synchronic impulses is precisely defined and it is adjusted between two telephones during the speech, i.e. those two telephones are synchronized. During the conversation, pressing the button for transmission, as with walkie-talkies the conversation is done, being the only shortcoming of this telephone. Note: The shortcoming of this telephone is that it works at a free frequency of 27MHz and a higher frequency licence should be asssigned to us.
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