Professional radio intercom
The users of professional radios are mostly used in the professional business of group teams. Therefore, the characteristics of professional radio walkie-talkie is that the function is simple and practical. In the design, there are multiple communication interfaces for users to make secondary development. The frequency report setting is mostly through computer programming, users can not change the frequency, the panel displays only the number of channels, does not directly display the frequency point, the frequency of confidentiality is better, the frequency of stability is also higher, not easy to run.
In the long-term work, its stability and reliability are high, and the working temperature range is wide, generally -30 degrees to +60 degrees. The working frequency of the professional machine is V high section (148-174MHZ) and V low section (136-160MHZ) in the VHF section. Another part is the entire section (136-174MHZ). However, in the UHF band, most of them are U-high (450-470MHZ) and U-low (400-430MHZ), and very few are U-wide (400-470MHZ). The performance, reliability, and stability of professional machines are higher than those of amateurs. Their prices are naturally higher than those of amateurs, and some are even higher.
Amateur radio interphone
A radio intercom designed and manufactured to meet the needs of radio enthusiasts. This kind of walkie-talkie can also be called “playing machineâ€, and the enthusiasts who play the walkie-talkie are called “HAM†or “hamâ€. Due to the limited frequency range of radios, there are differences between the environmental conditions and requirements for use and professional walkie-talkies. The main feature of the amateur machine is that the volume should be small, the function should be complete, the frequency scan can be performed, the frequency can be directly set on the panel, and the frequency point can be displayed on the panel. Its technical indicators, equipment stability, frequency stability, reliability, and work environment are also worse than professional radios. The direct result is that the cost of the amateur machine is also lower to meet the needs of individual purchases.
In response to this amateur personal radio service, various countries have allocated special frequency bands for use by amateur radio sports enthusiasts. The frequency bands opened by China are 144 to 146 MHz and 430 to 440 MHz. This is generally the case in all countries in the world. In October 2001, the "Radio Frequency Planning of the People's Republic of China" published by the State Administration of Radio Communications of the Ministry of Information Industry specifically described amateur radio amateurs and amateur services as "amateur services: self-training and mutual communication for amateur radio amateurs". Radiocommunication services for technical research. Amateur radio enthusiasts refer to people who are formally approved and interested in radio technology, whose interest is purely personal and does not involve profit."
The users of professional radios are mostly used in the professional business of group teams. Therefore, the characteristics of professional radio walkie-talkie is that the function is simple and practical. In the design, there are multiple communication interfaces for users to make secondary development. The frequency report setting is mostly through computer programming, users can not change the frequency, the panel displays only the number of channels, does not directly display the frequency point, the frequency of confidentiality is better, the frequency of stability is also higher, not easy to run.
In the long-term work, its stability and reliability are high, and the working temperature range is wide, generally -30 degrees to +60 degrees. The working frequency of the professional machine is V high section (148-174MHZ) and V low section (136-160MHZ) in the VHF section. Another part is the entire section (136-174MHZ). However, in the UHF band, most of them are U-high (450-470MHZ) and U-low (400-430MHZ), and very few are U-wide (400-470MHZ). The performance, reliability, and stability of professional machines are higher than those of amateurs. Their prices are naturally higher than those of amateurs, and some are even higher.
Amateur radio interphone
A radio intercom designed and manufactured to meet the needs of radio enthusiasts. This kind of walkie-talkie can also be called “playing machineâ€, and the enthusiasts who play the walkie-talkie are called “HAM†or “hamâ€. Due to the limited frequency range of radios, there are differences between the environmental conditions and requirements for use and professional walkie-talkies. The main feature of the amateur machine is that the volume should be small, the function should be complete, the frequency scan can be performed, the frequency can be directly set on the panel, and the frequency point can be displayed on the panel. Its technical indicators, equipment stability, frequency stability, reliability, and work environment are also worse than professional radios. The direct result is that the cost of the amateur machine is also lower to meet the needs of individual purchases.
In response to this amateur personal radio service, various countries have allocated special frequency bands for use by amateur radio sports enthusiasts. The frequency bands opened by China are 144 to 146 MHz and 430 to 440 MHz. This is generally the case in all countries in the world. In October 2001, the "Radio Frequency Planning of the People's Republic of China" published by the State Administration of Radio Communications of the Ministry of Information Industry specifically described amateur radio amateurs and amateur services as "amateur services: self-training and mutual communication for amateur radio amateurs". Radiocommunication services for technical research. Amateur radio enthusiasts refer to people who are formally approved and interested in radio technology, whose interest is purely personal and does not involve profit."
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