Antiference HDMIE50P - HDMI Over CAT extender - Features & Fault finding


Both in the office and at home many viewing sources require connection via HDMI. In many circumstances HDMI leads aren't long enough for extending signals. Today we're looking at the Antiference HDMIE50P HDMI Over Data Cable extender set which allows you to extend 1080P signals up to distances of up to 50m. The product features a useful HDMI loop out for local screen connection essentially allowing you to view it on two screens without the need for HDMI splitter as well as POE at the receiver end saving a valuable plug socket behind your TV or monitor.

In this blog we'll go over setting up a HDMIE50P and problem solving it, we've also included a useful product for extending USB in a similar way, this is especially useful when extending the mouse from DVR/ NVRs.


1. First of all, you will want to connect the source (Ie DVR/ NVR, Blu Ray)  to the Input of the HDMI transmitter and then connect your CAT5e/ CAT6 cable to the receiver end. Connect your HDMI output on the receiver to your monitor and then plug in the power supply and turn on..

*Take note of the lights on the ethernet port

Green Power: If this is isn't on or is flickering, it indicates a potential issue with the power. This could be down to a lack of power from a faulty/damaged cable. If there is no green light at all then this could be an issue with the power supply.  **It is always recommended to install a full copper cable and avoid CCA grade data cable**

Yellow = Network: if this isn't on or is flickering, it indicates that there is a problem with the network connection. This may be a result from a weak network connection due to the length of the cable or the size of the signal being transmitted, a cheap or an underperforming cable or even a poor physical connection /crimp.

1a. (OPTIONAL) Now is a good time to plug in any peripherals like a mouse for a DVR/ NVR.

Here we have used a SMEDZ USB over CAT5e extender (USBCAT5E) to demonstrate that you can also have the mouse across the distance of the HDMI which can be used to control the DVR like normal. It's quick to install,  cost effective and no doubt welcomed solution for your customer.

* Note you will require 2 separate data cables using this method of extending USB and HDMI. If you only have one cable then KVM solution will be required (SMZ-HDMI-USB)

2. At this point if everything from the above is correct then we should be receiving a picture, if not then it could be down to a couple of simple things.

Problem 1 - No HDMI signal

Is your viewing screen a TV or Monitor ? If it's a DVR you're trying to view on a TV then this could be a supported resolution issue. Many DVRs are set out of the box at 1024*768, this resolution is supported by most monitors but not TVs. You will need to adjust your DVR settings to support the TV using either 720P or 1080P.

*Mast pre-configured DVRs/NVRs are set to 720P to ensure this isn't an issue*

If you're still receiving no HDMI signal then the likelihood is that your equaliser settings will need to be adjusted.

3. Equaliser - (EQ) - A very important setting on HDMI extenders and the cause of most issues with you'll come across on the HDMIE50P / It's something that should be taken note of on each install. The equaliser allows optimum performance for the installed cable distance. Each dip switch format allows for a different cable range. As standard these are set to 50m setting however many installs are well below this meaning the dip switches will need adjusting to suit. Please

Equaliser settings can always be found in the manual of the extender you have purchased. In the case of the HDMIE50P, here is a picture of EQ settings from the manual.


4. If you're receiving a picture but the image has green speccles/ pixels (As pictured) then this will likely be down to your EQ settings. If the EQ settings do not resolve the pixels then the HDMI lead should be changed as this could be down to a poor quality cable.


All in all the HDMIE50P is a very reliable piece of kit and something that's very useful to have. It is always recommended to use a good quality copper data cable and high quality HDMI cables to eliminate potential issues. By following the above you'll no doubt resolve many of the issues you may have and of course if you get stuck just give us a call!