Antenna installation and use instructions: Antennas are directional and omnidirectional. Directional antennas transmit signals in a certain direction, such as using a set of products (front-end only one camera), and send them one at a time (one transmitter to one receiver). The omnidirectional antenna transmits the signal to the surrounding area. For example, when one transmitter transmits multiple receivers, the transmitter uses an omnidirectional antenna. On the multiple receivers of the control center, each receiver uses a directional antenna. The antenna is usually installed on the transmitter side. If you want to get better results, you can install the antenna on both sides of the transmitter and receiver. Outdoor antennas can be installed at 200mW or more, and outdoor antennas can be installed in open and unobstructed environments. The transmission distance can be increased several times (depending on the antenna gain, 5DB increase in antenna gain corresponds to a doubling of the power of the transmitter). Directional antenna installation direction: The transmitting antenna and the receiving antenna should be installed and fixed facing each other! !
If an external antenna is connected, the effect is not to use the original small antenna. The only possibility is that the external antenna is not connected. These connections include the connection between the connectors above the antenna, the connection between the antenna and the transmitter, especially The antenna connector connected to the transmitter must be accurately inserted into the hole in the transmitter antenna connector. Otherwise, the external antenna will not work.
When testing, due to limited power supply, only one side of the room can be used to provide power for the transmitter, but not to provide power to the receiver in another room, which is just right for receiving. Machines and transmitters cause obstacles because buildings with reinforced concrete structures have the greatest resistance to radio waves. In order to avoid any obstacles, please ensure that there is no obstruction between the transmitter and the receiver as much as possible. It is possible to extend the connection between the receiver and the monitor and lengthen the connection between the transmitter and the camera so that the antenna of the transmitter and the antenna of the receiver can interact with each other. visible. The transmitting and receiving points have walls or other obstacles. No matter the distance to be transmitted, you must extend the transmitting and receiving audio and video connections or install an outdoor high-gain antenna to bypass obstacles as much as possible. Only by keeping the transmitting antenna and the receiving antenna visible to each other can we test our marked transmission distance and receive a clear image.
The initial use of video transmission steps:
Select the transmitter must be transmitted and received is complete, the transmitter, receiver, antenna frequency must be associated with the job! ! The front-end camera (camera grab, camera) is turned on and connected to the wireless transmitter; the back-end control center, receiver and monitor (television) are connected. Note: To ensure that the monitor (television) is working properly, such as using a computer display, purchase a separate acquisition card and access the computer through the acquisition card; then verify that the power supplied by the transmitter and receiver is the correct amount of current. Connect the transmitter, camera and power supply, and then connect the receiver, monitor, power supply, audio and video cable, and adjust the buttons on the transmitter and receiver to select the channel.
Transmitter and receiver FM mode:
1.2G15 channel transmitter corresponds to 28 channels:
3, if the transmitter is 15 channels, the receiver is 28 channels, in use, the transmitter and receiver channels are tuned to the same number, follow-up environment can be more than a few channels to try until the sound and received The picture is very clear to the digital display receiver cycle function instructions:
Turn on the power first, the LED display lights, press any key of CONTROL to receive 28 channel signals between 0.9G—1.56G, the display changes from 00, 01, 02...28, and each press changes once A channel. When you need to automatically cycle a certain number of channel signals, just select the receiving channel, press and hold any of the CONTROL buttons for 4 seconds, the decimal point lights up, indicating that the channel's signal has been stored, release the button, press and hold a button again to select Repeat the above steps for the looped channel. Press the CONTROL key to select the signal to be received. Press the CONTROL key to adjust the digit to the OA position. At this time, the receiver will receive signals of different frequencies according to the channel you selected above. To release the cycle: (1) You can press and hold one of the CONTROL buttons to release it until display 00. The cycle is released; (2) You can power off the cycle once. When the display is adjusted to 0A, only the storage indicator lights, indicating that there is no looping channel. When power is turned off, it needs to be reset. If the power is not turned off during the cycle, the channel will automatically record the channel before the power off when the power is turned on. The receiver is marked with VIDEO, AUDIO, and 12V, respectively connected to the AV input of the monitor. DC12V is a positive power external power supply plug.
Channel Adjustment on the Transmitter There are 1, 2, 3, and 4 position pull switches as shown in the figure above, and 8 channels can be called up. The transmitter is dialed to 2414 receiver display 01 as shown in the above chart; the transmitter is dialed to 2432 receiver display 02; Transmitter dials 2450 Receiver display 03; Transmitter dials 2468 Receiver display 04; Transmitter dials 2370 Receiver display 05 Transmitter dials 2390 Receiver display 06 Transmitter dials 2490 Receiver display 07 Transmitter The machine dials 2510 to display 08 so that it can receive sounds and images. The receiver is marked with VIDEO (video), AUDIO (audio), 12V, and the AV input of the monitor. DC12V is a positive power external power supply plug.
Indoor transmitter power requirements:
The common transformer on the market is marked with 1000mA, and after careful measurement, only 700mA, the receiver we produce needs 12V450mA power supply; the transmitter below 800mw transmitter needs 12V/600mA power supply; 1000mW to 1500mW transmitter needs 12V1.500MA switching regulator power supply; 2000 milliwatts to 3000 milliwatts transmitter needs to use 12V2500MA switching power supply; 5000 milliwatts transmission needs 12V3A switching power supply.
Indoor transmitter receiver with lithium battery requirements:
In the unlikely event that there is no power source, the rechargeable battery or battery can be used to provide power. However, the transmitter below 3000mw should not be powered by 12V battery for a long time, because the voltage of 15V or above will easily damage the transmitter when the 12V battery is fully charged.
Test/Usage Problem Explanation:
When you use this product, if there is a scrolling black bar on the monitor (television) screen, it may be a poor transformer that you don't have enough power supply or use for the transmitter or receiver; if the image is not too For clarity, first check the camera (camera, camera) you purchased, because the camera is what kind of definition, what clarity is received, it is recommended that the best quality camera.
Signal interference, channel interpretation:
The number of wireless video transmitters provided by ordinary manufacturers is four, and the wireless video transceivers developed and produced by our company are 1.2G15 channels; 2.4G has 8 channels; a total of 23 frequency points can be adjusted and can be completely avoided Other people's channel. In the same area, 19 sets of transmitters can be used at the same time, leaving him with four frequencies in between.
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