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How to buy walkie-talkie FAQ
Add Time: 2015.11.10      Clicks: 1302
Q: What are the formalities required to purchase walkie-talkie?
A: Using wireless radio frequency resources to be occupied, it must apply to the local radio management committee, to be non-commissioned approval before purchasing the use of specific procedures need to apply are as follows: 1. No committee or dealer to receive "Set Radio declaration Table "; 2. Fill out the form, use the area, purchase quantity, purpose must be filled out clearly and affix the official seal; 3. support returns to the District Security Bureau (generally within the district government authorities) filing the declaration, approved by the District Security Bureau, in comments on the application form and sign the form returned to the applicant; 4. holding "Application Form" to the non-commissioned declaration. SRRC approved and approved the use of frequencies shall be issued after the applicant 'purchase licenses "; 5. hold" purchase licenses "buy walkie-talkie; 6. holding walkie-talkies and" quasi-purchase card receipt "to the non-commissioned tests and pay frequency occupation fee (100.00 yuan per year) and so on. No committee issued "radio station license." The use of public radio, without receiving a license, free of frequency occupation fee. Using human (or units) in the acquisition of public radio simply fill out provided by the manufacturer "Registration Card" button.
Q: What is the difference between analog and digital walkie talkie?
A: The traditional analog radio is the voice, signaling modulated continuous wave signal to the carrier frequency walkie-talkie, and after a communication mode amplification optimization process. Mature technology, improve the system, the cost is relatively low. Digital radio is the voice signal is digitized in a particular digital encoding and specific baseband modulation format, and digital signal processor optimized data of the communication mode. Compared with traditional analog radio, voice-interference ability, high security, channel occupy a more narrow bandwidth, greater capacity to transfer data and other significant advantages.
Q: U / V segment talkie distance calls Which is better?
A: distance calls and walkie-talkie use environment. Electromagnetic wavelengths U / V segment is not the same machine, transmission losses are not the same, because the buildings inside the city more, use the intercom segment U is relatively good; if the environment is more open, such as the sea, desert, etc., V section intercom relative better.
Q: Why use the walkie-talkie frequency limits?
A: To ensure that the vast majority of users to talk undisturbed and rational use of frequency resources, the state radio station on the frequency of use of the management committee were divided, the provisions of different industries using the appropriate frequency range. When users purchase walkie-talkie, and would like to apply for a local radio frequency management committee
Q: intercom call to pay for it?
A: conventional walkie-talkie to talk to do not pay. No matter how much you use frequently, every year you only need to pay for each unit talkie frequency occupancy costs tens of dollars can be, such as the use of public radio is not required to pay any fees.
Q: After a period of silence using a headset?
A: Please change the sub-audible tone, while the group must change the tone of all the walkie-talkie, or apply to change the frequency.
Q: Can the intercom call?
A: In the case of network support conditions, radio can be used to call. However, if only conventional single call between the phone functions can not be achieved.
Q: Will there be radiation using a walkie-talkie problem?
A: walkie-talkie designed to meet the relevant provisions of the Ministry of Information Industry [2001] No. 869 document, will not harm the human body, and is not close to the body when using a walkie-talkie call, but the body 5-7 cm distance calls.
Q: What factors affect the walkie-talkie distance calls and effects?
A: 1 system parameters: 1) The transmitter output power is stronger, the greater the coverage of the transmitted signal, the farther communication distance. However, the transmission power can not be too large, the transmission power is too large, not only power, influence amplifier component life, and interference is strong, affects call quality and others, but also produce radioactive contamination. States authorities to transmit power radio communications equipment are clearly defined. Receiver sensitivity 2) communication equipment, the more distant communication distance. 3) the antenna gain when the antenna is matched with the machine, typically, the antenna height increases, the reception or transmission capacity enhancement. The hand-held walkie-talkie antenna is generally helical antenna, the bandwidth and gain than other types of antennas to be smaller, more vulnerable to human impact. 2. Environmental factors: Environmental factors are the main path, tree density, electromagnetic interference environment, buildings, weather and terrain differences and the like. These factors and other parameters directly affect the field strength and coverage of the signal. 3. Other factors: 1) The battery is low, when the battery is low, voice quality will deteriorate. Serious, there will be noise, affecting the normal call. 2) antenna matching, band and band antenna inconsistent machine, the antenna impedance mismatch, will seriously affect the distance calls. For users, the antenna should pay attention when changing the antenna tightening, while non-manufacturers can not just use the antenna provided can not use the machine does not meet the antenna frequency point.

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