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Walkie talkie why frequency limit
Release Date:【2011.10.8】

Walkie talkie why frequency limit

In order to ensure the vast majority of users call undisturbed and rational use of frequency resources, National Radio Management Committee on the frequency of use were divided, different industries using the corresponding frequency range. When the user is buying the walkie-talkie, to local radio management committee for frequency point.

* what is the public radio?

Public Radio refers to : transmitting power is less than 0.5W, working in the specified frequency wireless interphone, the radio frequency, power and RF technology indicators must meet the following requirements:

1, effective radiated power ( EIRP ): < 0.5W;

2, emission frequency tolerance: < + 5ppm;

In 3, the transmitter spurious radiation: < 50uW;

In 4, receiver spurious radiation: < 20nW;

5: 12.50kHz, channel spacing.

In 6, operating frequency ( 9000; 409 units: MHz ): 409.7500, 409.7625, 409.7750, 409.7875, 409.8000, 409.8125, 409.8250, 409.8375, 409.8500, 409.8625, 409.8750, 409.8875, 4099125, 409.9250, 409.9375, 409.9500, 409.9625, 409.9750, 409.9875;

7: F3E, modulation mode;

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