Zhongjiuhutong remote control 13.5cm Zhong9 set-top box remote control receiver remote control ABS material

Zhongjiuhutong remote control 13.5cm Zhong9 set-top box remote control receiver remote control ABS material

Deeply understand the principle and characteristics of wireless remote control

I believe you all know the wireless remote control. It has been widely used in various fields and is also a common device. It appears in smart home, anti-theft alarm, electric door and window, automobile electronics, industrial control and other fields. It has the advantages of convenient use, remote control and small size.

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Principle of wireless remote control:

The principle of the wireless remote controller is to number the electronic signals controlled by the transmitter first, then modulate, infrared modulate or wireless FM, AM, and convert them into wireless signals for transmission. The receiver receives the radio wave containing information, receives, amplifies and decodes it to obtain the initial control electronic signal, and then amplifies the electronic signal to drive the relevant electrical components to realize the wireless remote control.

Wireless remote control is a remote control device, which uses radio wave control equipment. The commonly used wireless remote control system is mainly divided into two parts: transmitting and receiving.

(1) The transmission part is mainly divided into two forms: remote control and transmission module.

(2) Generally, the reception part is also divided into two forms, namely, super-external difference and super-regenerative reception. The super-regenerative de-regulating power supply circuit is also called the super-regenerative detection power supply circuit. In fact, it is a regenerative detection power supply circuit that works in the intermittent oscillation state. The superheterodyne demodulation power circuit is the same as the superheterodyne radio. It is equipped with a machine oscillation circuit that generates oscillation signal. After receiving the mixed frequency signal, the intermediate frequency signal is obtained, and the network signal is called out through the intermediate frequency amplification and check wave.

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Features of wireless remote control:

1. The wireless remote control has the function of setting data information not to be lost: sending single pulse, sending mode, single code and double code conversion are set by the keyboard, and the set state is always valid before the next setting. Replace the battery. Long-term power failure has no effect on the set data information.

2. Panel dual status indicator: there are two indicators on the panel, indicating the status of effective function keys, emission status, etc. It is very intuitive when using double-digit code.

3. Increase the transmission power of the wireless remote controller to realize remote control. The wireless remote controller adopts high-power transmission design, with a long transmission antenna and a distance of 200~1000 meters (open ground).

4. The wireless remote controller uses high capacity batteries, and the battery capacity is increased. The wireless remote controller uses 6. Compared with the remote control, F22 9V has a 23 times increase in the capacity of stacked battery powered A battery. It not only reduces the use cost, but also lays the foundation for high-power transmission. There is a charging input socket on the remote control, which can be charged by the 6F22 rechargeable battery, which is conducive to environmental protection and long-term use.

5. Static complete power off: the battery is powered off when the function key is operated, and the battery is completely powered off when the operation is completed. Energy-saving extends battery life.

6. The wireless remote control has retransmission function: the last double code operation of this remote control has retransmission function. In the status of double-digit code transmission, press the "*" button, and the last double-digit code will be sent by instant transmission. In the status of double-digit code transmission, press the "#" function key to release, and the last double-digit code will be sent regularly.

7. The wireless remote control buttons can be divided into single button sending and double button sending: the number of remote control buttons is limited, no matter the remote control button keyboard can not accommodate hundreds of buttons, the wireless remote control adopts the telephone multi-code group mode. In addition to the ordinary remote control can operate with single button, it can also be set to the double code sending mode. In the double code working mode, such as using the telephone, the double code command will be sent immediately after pressing the two buttons. The remote control can also be set as a 3-digit code or a 4-digit code. Even the instruction with two-digit code is 12+100=112 is usually enough. You can manually switch between single-key and double-key codes.

8. Add the number and address of the wireless remote control: the number of PT2262 numbers is 6561, and the number of this remote control number is 65365. The number of PT numbers is 10 times that of 2262, and the repetition rate is greatly reduced.

9. The wireless remote control has two transmission methods: regular transmission and ordinary transmission. Ordinary transmission is the remote control transmission method used in the market; Fixed transmission is a new transmission method, which can ensure that the receiver can receive the remote control commands normally and greatly shorten the transmission time. This transmission mode can not only reduce the interference between remote controllers at the same time, but also save the power required for transmission, which is conducive to extending the battery life. Two transmission modes can be set manually.

10. The wireless remote control can be compatible with the original 2262 code remote control, and both send the same number of codes. However, compared with the remote control numbered 2262, the pulse width setting is flexible. The default narrow pulse state is equivalent to the pulse width of PT2262 using 1.5M ～ 2M oscillating resistance. The pulse width can be manually set to the wide pulse output mode, which is equivalent to the oscillating resistance of PT2262 using 3.3 ～ 4.7M output pulse width.