Antiference Video and USB over Ethernet extender



Today's blog will cover a very fitting product for CCTV applications - the Antiference KVM Extender.


Package Contents


*HDMI and Ethernet cables are not included as varying lengths may be required


Diagrams and description of ports

  1. Power indicator
  2. USB connection indicator
  3. LAN signal output
  4. Reset button
  5. Power input (5VDC)
  6. HDMI input
  7. USB port (to connect to DVR)



  1. Power indicator
  2. USB connection indicator
  3. LAN signal output
  4. Reset button
  5. Power input (5VDC)
  6. HDMI input
  7. USB port (to connect to DVR)


Setting up your KVM


First you will need to remove everything from the box and ensure the contents are accounted for (see above for list).

You will need both power supplies as the RX balun is not PoE powered on these units, this is to allow for the much longer transmission distance (up to 120m).

  1. Start with setting up the transmitter end first; connect the included PSU to the TX balun input, you should see the LED power light come on.
  2. Next you need to connect in the HDMI source (in this case a recorder) using a HDMI lead
  3. At this point, if you plan on using the USB over Ethernet function as well then you need to connect the supplied USB to USB cable to your input device (recorder / PC).




  1. Once the transmitter is set up correctly you can now configure the receiver; connect the 5VDC in the same way as on the TX balun, again you should see the power light come on.
  2. Now connect the HDMI output to your monitor / TV via HDMI cable
  3. If you are using the USB function then connect your mouse and(or) keyboard to the two USB inputs





After both devices are connected and powered up, run an Ethernet cable between the two to link them - the link light will turn yellow. 

You should now be able to get an image on your viewing platform, if this is not the case then press the reset button on both units so it can configure the distance and EDID settings.






Using through a network

One quite unique and potentially very useful feature of these particular HDMI baluns is that they are designed to also work through a switch. This means that you can actually transmit the signal through your existing network.

Simply set up your TX and RX baluns as described above but instead of running an Ethernet cable between the two, connect the Ethernet on the transmitter into your existing network and do the same with the receiver. You may need to reset them to reset the distance and EDID as above.

This feature can prove very useful in office environments that have LAN ports around the building as it negates the need to run a cable.


Things to bear in mind

The recommended distance for this product are 100m over CAT5e and 120m over CAT6 for 1080p video and USB.

You need to power both ends as mentioned above, this is to allow for such a long transmission distance.

Always use good quality HDMI leads.