First press the dot key to adjust to the frequency mode, enter 438.438 then press MENU then press 10 on the numeric keypad to adjust to the digital sub-tone press the white triangle symbol key to find the digital sub-tone you want then press MENU to store it, then press 12 on the numeric keypad to adjust to the corresponding digital sub-tone, store it (the two digital sub-tones should be the same, or it can't be used) then press 27 to store it to a blank channel. It's done.
1, the English name of the walkie-talkie is two way radio, it is a two-way mobile communication tool, in the case of not needing any network support, you can talk, no call charges, for relatively fixed and frequent calls to the occasion. There are three main types of walkie-talkies: analog walkie-talkies, digital walkie-talkies, and IP walkie-talkies.
2, walkie-talkie technology was first produced in the windy twenties, born in the Westinghouse laboratory. A named John Kermode character eccentric inventor "whimsical" to realize the postal documents automatically check, that time on the application of electronic technology, every idea is very novel. His idea was to mark envelopes with a walkie-talkie, in which the message was the recipient's address, like today's postal codes. For this reason Kermode invented the earliest walkie-talkie marking, the design scheme is very simple, that is, a "bar" represents the number "1", two "bars" represents the number "2", and so on. Then, he invented by the basic components of the intercom reading device: a (able to emit light and receive reflected light) determination of the reflected signal bar and the empty method, that is, the edge of the positioning coil; and the use of the determination of the results of the method, that is, the decoder.