VOXLINK HD 1080P HDMI 1.4a Wireless HDMI Extender for HDTV 3D Wifi HDMI Sender Transmitter Receiver up to 30m Support HDCP1.4 3D
If your a little like me a movie enthusiast, you may also prefer to enjoy your home movie collection with the highest possible picture and sound quality, on demand. You may also be tinkering with streaming movies from your home Network Attached Storage (NAS) to one or more HD screens on your home. I have always had the intention of showing movies or YouTube collections on TV or monitor screens around the home that synchronize with music through my Sonos sound system. I see myself using this when I have a bunch friends over, watching the Rugby with my mates or just enjoying our favorite movie with the family.
Regardless your goals, moving HDMI signal around the home, overcoming signal losses when using long HDML extensions, or signal spliters has always been a challenge.
Over the years I have tested various Wireless HDMI extension devices which all suffered from interference or signal loss when transmitter and receiver are not in line of sight or are too far from each other.
Mind you, in my case I could use a 15 metre HDMI extension cable, and I tested this and confirm it works. However to keep the cable length down (so it wont pick up interference or signal loss) I would need the cable to sit on the floor as it cross a hallway, and that's a recipe for disaster.
The Problem to be solved by WiFi Extenders
So my goal for this exercise is to find a series of devices that will allow the same picture sent out to one or more TV's or monitors, at the same time, distributing HDMI a full resolution. I will also be attempting to separate audio from the HDMI and pass that into the SONOS sound system to distribute throughout the home, (great for parties).
My first obstacle is sending HDMI to the TV, without unsightly cables sitting on the floor or visible in corridors attached to skirting boards.
I WiFi HDMI extender would be a perfect way to pass the signal across a room, avoiding a longish cable around the corners of the room. This might then only require a shorter cable at sending and receiving sides to connect the devices.
How would a WiFi Extender be used?
The Voxlink was rated as being capable of sending a HD 1080P signal up to 30 meters (in a line of sight). The line of sight is acceptable because of the higher frequency used for this device is less capable of bending around corners like that of your 2.4G signal used by home WiFi.
However, the devices come with mounting plates, so it would be simple enough to place the receiver and transmitter on top of a shelf or cupboard, so the signal can cross a room bouncing of the ceiling and for the most part the devices and connecting cable could be positioned out of sight.
How did the Voxlink perform?
Unfortunately the Voxlink did not perform as well as expected. The two devices (transmitter and receiver) would not connect at 30,20 or even 10 meters!
At 6 meters we managed to get a picture, and curiously if I moved the receiver just 1 littler further away, at 6.1 meters the signal (and picture) was lost.
For testing the devices were placed at 1 meters from the ground, in line of sight (no obstacles in between). If a person stood in front of the receiver for over 5 seconds the signal was lost.
If the person moved and line of sight was restores it could take up to 3 minutes for the picture to return. In some cases it did not return and a restart was needed to regain signal.
Finally when restarting both devices at 6 meters, it could take 2-3 minutes for the picture to appear.
At a distance of 2 meters the signal appeared faster (30 seconds), was much stronger and less susceptible to a human standing in between transmitter and receiver.
In conclusion the device we tested appears to lack the signal strength to be used in a home setting where the two devices are greater that 6 meters apart. But this still gives you some options, because you can use 5 to 10 meter extension cables from your source to the transmitter, and from receiver to the display device. So if all you want to do is get the signal across a corridor or down a hallway to be then met by a receiver and some cable you can hide behind furniture, its still a goo solution to a problem, and being self powered it is in a sense re transmitting the signal from receiver to the TV, so longer cable extensions might be possible from the receiver to your TV.
One word of caution with these devices, if that trying to daisy chain these devices together might NOT work. We did not test this scenario but we have noticed that using multiple passive extensions doesn't always work. You might find it works with one movie and not another, because of the resolution different amount of data is transmitted which will play havoc in a circumstance where the signal is only just strong enough to get through.
Whats next ?
Next element to solve is to find powered HDMI spliter devices that can separate the same signal and pass it to multiple receiver devices allowing simultaneous video streaming to multiple devices in the home. The problem being that although there are devices that advertise this capability, once you daisy chain devices together the technology that re transmits the HDMI signal may pass a signal on that your TV cant display, but I will share more on this once I have finished the research!