The commonly used electric door remote control system is generally divided into two parts: transmitting and receiving.

(1)發射部分

(1) Launch part

分為遙控器和發射模塊，遙控器是作為一個整機來獨立使用;而遙控模塊在電路中當一個元件來使用，根據其引腳定義進行應用，使用遙控模塊的優勢在于可以和應用電路天衣無縫的連接、體積小、低、物盡其用，但使用者必須真正懂得電路原理，否則還是用遙控器來的方便。

It is divided into remote controller and transmitting module. The remote controller is used independently as a whole machine; The remote control module is used as a component in the circuit and is applied according to its pin definition. The advantage of using the remote control module is that it can be seamlessly connected with the application circuit, small volume, low price and make the best use of everything. However, the user must really understand the circuit principle. Otherwise, it is convenient to use the remote control.

(2)接收部分

(2) Receiving part

分為超外差與超再生接收方式，超再生解調電路也稱超再生檢波電路，它實際上是工作在間歇振蕩狀態下的再生檢波電路。超外差式解調電路與超外差收音機相同，它是設置一本機振蕩電路產生振蕩信號，與接收到的載頻信號混頻后，得到中頻(一般為465kHz)信號，經中頻放大和檢波，解調出數據信號。由于載頻頻率是固定的，所以其電路要比收音機簡單一些。超外差式的接收器穩定、靈敏度高、抗干擾能力也相對較好;超再生式的接收器體積小、便宜。

Super regenerative demodulation circuit is also called super regenerative detection circuit. It is actually a regenerative detection circuit working in intermittent oscillation state. Superheterodyne demodulation circuit is the same as superheterodyne radio. It is equipped with a local oscillation circuit to generate oscillation signal. After mixing with the received carrier frequency signal, the intermediate frequency (generally 465kHZ) signal is obtained. After intermediate frequency amplification and detection, the data signal is demodulated. Because the carrier frequency is fixed, its circuit is simpler than that of a radio. The superheterodyne receiver has the advantages of stability, high sensitivity and relatively good anti-interference ability; Super regenerative receiver is small and cheap.

影響無線電式電動卷閘門遙控器遙控距離的因素：

Factors affecting the remote control distance of radio electric rolling gate remote controller:

a.阻擋，目前使用的無線遙控器使用規定的UHF頻段，以直線傳播，中間若有墻壁阻擋將折損遙控距離，如果是鋼筋混泥土的墻壁，由于導體對電波的吸收作用，影響更甚;

a. Blocking: the currently used wireless remote controller uses the UHF frequency band specified by the state and propagates in a straight line. If there is a wall blocking in the middle, the remote control distance will be damaged. If it is a reinforced concrete wall, it will be even more affected due to the absorption of electric waves by conductors;

b.發射功率，發射功率大則距離遠，但耗電大，容易產生干擾;

b. Transmission power: large transmission power means long distance, but it consumes a lot of power and is prone to interference;

c.接收靈敏度，接收器的接收靈敏度提高，遙控距離增大，但容易受干擾造成誤動或失控;

c. Receiving sensitivity: the receiving sensitivity of the receiver is improved, and the remote control distance is increased, but it is easy to be disturbed, resulting in misoperation or out of control;

d.天線，采用直線型天線，并且相互平行，遙控距離遠，但占據空間大，在使用中把天線拉長、拉直可增加遙控距離;

d. The antenna adopts linear antennas, which are parallel to each other and have a long remote control distance, but occupy a large space. Lengthening and straightening the antenna in use can increase the remote control distance;

e.高度，天線越高，遙控距離越遠，但受客觀條件限制。

e. Height, the higher the antenna, the farther the remote control distance, but it is limited by objective conditions.

電動卷閘門遙控器技術性能：

Technical performance of remote controller for electric rolling gate:

1、工作電壓：遙控盒AC220V，遙控器DC12V(23A型電池)。

1. Working voltage: remote control box AC220V, remote controller DC12V (23a battery).

2、負載功率：≤200VA。

2. Load power: ≤ 200va.

3、遙控距離：≤100米。

3. Remote control distance: ≤ 100m.

4、遙控類型：無方向性，可穿墻越壁。

4. Remote control type: non directional, can pass through the wall.

5、遙控方式：315MHz 6萬組編碼，產品之間互不干擾。

5. Remote control mode: 315MHz 60000 groups of codes, and products do not interfere with each other.

6、外形尺寸：遙控盒130×85×35mm，遙控器60×40×13mm。

6. Overall dimension: remote control box 130 × eighty-five × 35mm, remote control 60 × forty × 13mm。

電動卷閘門遙控器工作頻率與編碼：

Working frequency and code of remote controller of electric rolling gate:

電動門遙控常用的載波頻率為315mHz或者433mHz，遙控器使用的是規定的開放頻段，在這一頻段內，發射功率小于10mW、覆蓋范圍小于100m或不超過本單位范圍的，可以不必經過“無線電管理委員會”審批而自由使用。

The common carrier frequency of electric door remote control is 315MHz or 433MHz. The remote controller uses the open frequency band specified by the state. In this frequency band, if the transmission power is less than 10MW, the coverage is less than 100m or does not exceed the scope of the unit, it can be used freely without the approval of the "Radio Regulatory Commission".