Problem 2: Light Bends Pesky light waves stubbornly refuse to turn corners, lose their strength with distance, bounce all over the place causing interference patterns and are also emitted by room lighting, the sun and of course your display which "rather annoyingly" ha ha puts out lots of light itself.
Unfortunately all these light sources tend to put out light at frequencies in the infrared band in addition to the light waves you can see. Putting an IR receiver right next to your lovely Flat Panel display subjects the infrared light coming in to the various frequencies of light going out, causing interference. The sensor itself generally accepts a wide frequency range and needs to be properly filtered to remove non infrared band signals. The closer the receiver can restrict the incoming light to just the frequencies put out by the remote control the purer the signal will be, and the more reliable the whole system will be.
If a manufacturer of a device inadvertently uses an IR code that is used by another manufacturer then you get two devices responding in their own unique ways to a signal meant for only one device. By its nature, an IR distribution system sends all of the signals to all of the devices. So, if two devices use the same code for a function, both devices will receive that code and will perform the function.
This type of thing is mainly caused by manufacturers who are not privy to the codes of the other manufacturers. In addition, different manufacturers of remote controls use different protocols and different carrier frequencies to transmit these different infrared signals.
As usual, the manufacturers love NOT getting together and creating standards. Unfortunately for us users, this sometimes makes using their products less of an easy and happy experience.
Low power emitters and adjustable output emitters are available for equipment that is overloaded by standard or high power emitters. This is especially true for cable and satellite TV boxes. Problem 5: Simplifies Distribution, Not Remote Control The system does not eliminate the requirement for multiple remotes. An easy to use universal remote will provide an easy one touch control for a sequence of operations either by macros or simple commands.
IR targetsRemote controls today are mostly "IR" based controllers which use electromagnetic waves in the Infrared band of "Light", which is just below our eye's visible light wavelengths. Infrared light is used in quite a lot of applications. From those "night vision" goggles used by the military and the freak in Silence of the Lambs to ultra cool uses in Astronomy and Art history.
Well, ok, "ultra cool" to the geek in us. Tech Note: Some remotes use "RF" frequencies. These are radio frequencies which are below infrared wavelengths in the electromagnetic spectrum.
The target's goal is to receive the light that an IR remote control puts out and convert it into electrical signals. The electrical signals must be filtered to remove the frequencies not within the frequency range emitted by the controller. If the target does a poor job of filtering, you get a noisy signal. Garbage in, garbage out is very much the case here. This is what makes the targets you use the most crucial part of the system. While you could say that the IR signals sent by the remote are analogous to digital signals, the light waves hitting the target are coming from all over the room and are more similar to analog.
If the remote turns the TV on, then it works. Be sure to clean the TV sensor before placing the IR repeater on it. This will help with a clear connection, and will help it stick on the adhesion.
A lot of people ask if you can plug the IR emitter directly into the television into the powered USB port. Their answer is yes, you can but that does make it more difficult to turn the TV on because the IR repeater does not have power when the TV is off. To compensate for this you can always turn on the TV by standing close to the TV and simply angling the remote around the frame. Leave me a comment below or shoot over an email! RC-MM protocol is becoming more prevalent with major brands.
Extending IR signal is only half of the problem. At Sewell we have designed multiple IR extenders for a variety of different set-ups. All of our IR Extenders are dual band and should work for most devices.
Here are some questions you should be asking and a few recommendations for those key factors in setups. Distance can be conquered both with cables and wirelessly. Our extenders can be extended via ethernet cable phoenix adapters or 3. Is there a clear path to your devices? Is there a wall or cabinet in your way? We have a few accessories that are able to fix some of those problems. But if you are needing to control 3 devices or more: our recommended choice is the BlastIR Pro.
When you are trying to control from multiple points things can get a little more complicated with interference. When you are trying to control from multiple points, the BlastIR Multizone can have 3 different receivers, control 12 devices, and protect from interference. See also BlastIR Pro.
Just plug and play over your already installed HDMI cable.
0コメント