Understanding the Basics of Wireless Video Transmission
Video transmission is much more sensitive than audio transmission, requiring precise setup to achieve long-distance transmission. A critical factor is ensuring a true line of sight (LOS) between the transmitting and receiving antennas.
Importance of True Line of Sight
True line of sight is more than just being able to see the other antenna. Proper antenna placement is crucial for optimal performance. When an antenna radiates, it doesn't just send signals straight point-to-point; signals radiate out in a cone shape. Some signals go up into the air, while others bounce off the ground or other obstructions. These variations can cause parts of the signal to arrive out of phase with the direct signal, leading to interference and poor video quality.
To achieve long-range wireless video transmission, place the antennas 15-20 feet above any obstructions, ensuring a clear path for the signal.
Antenna Placement and Obstructions
Even if there are no obstructions other than the ground, aim to place the antenna as high as possible to maximize distance. Surprisingly, the ground counts as an obstacle! Ensure the antenna is elevated to avoid signal interference.
When installing your system in winter, consider any trees between the transmitter and receiver. What works perfectly in winter may fail in summer when trees grow leaves. Moisture-laden leaves are excellent at blocking signals.
Also, account for moving items as potential interference sources. For example, a truck passing through the signal path can disrupt video transmission. Raising the antenna to maintain a clear line of sight can solve this issue.
Long-Range Wireless Video Installation Instructions
This long-range wireless video camera system uses "access points," with one set to transmit and the other to receive. The receiving side connects to the internet through your building's network router or an Ethernet switch. The access point requires 24 volts DC and includes a Power over Ethernet (PoE) injector to provide power through a CAT 5 or higher cable. Plug the PoE injector into a 110VAC outlet.
Here is an example of some wireless bridge equipment: wireless bridge kit
On the camera side, an access point is set to transmit mode. It also includes a 24 volts DC PoE injector as its power source. The camera requires an 802.3af compatible PoE injector that auto-detects the correct voltage. As this side is usually outdoors, use a waterproof electrical junction box with a 110VAC outlet to house both PoE devices.
A short CAT 5 cable (included) connects the two PoE devices. Longer CAT 5 cables are available for purchase; you'll need one for the camera and one for the access point. Measure the cable length required for optimal positioning of both devices.
Monitoring Capabilities
Once your video is on your network, you can view it using standard devices such as desktops, laptops, tablets, or smartphones. Free software for PCs and low-cost apps for tablets and phones are available for convenient monitoring.
If instead of a long-rang video you need both audio and video, check out our video intercom equipment here: Types of video intercoms
Copyright IntercomsOnline.com. All Rights Reserved.
