Powered HDMI > Cat5e baluns sending power into my matrix?? - AVS Forum | Home Theater Discussions And Reviews
Forum Jump: 
Thread Tools
post #1 of 3 Old 09-18-2013, 09:57 AM - Thread Starter
analoguebaby's Avatar
Join Date: Sep 2013
Posts: 1
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Hi there,

I've been reading through some of the many threads here on issues with sending HDMI over Cat5e, but I think this may be a more specific problem so I'd really appreciate any advice.

We have a 4x4 HDMI matrix from CPC Farnell - http://cpc.farnell.com/_/hdsmx404/switch-hdmi-4x4/dp/CS20232?in_merch=Products%20From%20This%20Range

and we're using these baluns - http://www.hasense.com/html_products/HDMI-Super-Extender-(-By-CAT-5e6cable-50M)-21.html

to send HDMI from the matrix outputs to another room. The run is fairly long and includes a Cat5 patch bay and a wall panel in the other room.

I'm having problems with dropouts, "snow" and other forms of interference appearing onscreen. I'm using Cat5e cables I've terminated, replaced and re-terminated myself at every point in the chain. Ditto with HDMI cables, though these are pre-made. In other words I'm pretty satisfied that the cables are fine. I've also swapped out the baluns for new ones to no avail.

The baluns come with a 5V power adapter, but plugging this in gives me a weird problem. When I power up the baluns (power input is located at the receiver end) I can't turn the HDMI matrix off - that is, flipping the power switch on the matrix doesn't seem to do anything as all the LEDs remain lit. When I remove the power supply from the balun the lights on the matrix go out. Is the balun sending 5V back to the matrix? I've left it off for now, but I'm not sure if power is actually needed for the baluns to work properly or whether it just powers the IR magic eyes (I'm not using these).

Close to throwing in the towel and just running some heavy duty HDMI cable through the loft. Any help would be hugely appreciated though.

Many thanks in advance,
analoguebaby is offline  
Sponsored Links
post #2 of 3 Old 09-19-2013, 06:43 PM
AVS Forum Special Member
AV_Integrated's Avatar
Join Date: Jun 2005
Location: Northern, VA - Washington, DC
Posts: 5,390
Mentioned: 32 Post(s)
Tagged: 2 Thread(s)
Quoted: 1095 Post(s)
Liked: 794
This is a cheap HDMI over Cat-5 extender and is producing results which are common to many of these types of products. It has been shown over and over again that this is exactly the type of unpredictable issue which should be expected with these.

I know, not what you want to hear.

If you have a distance over 50', then I would recommend that you use a HD-Base-T transmitter/receiver set such as those sold by Monoprice.


I have personally tested these up to 300' using 6 pieces of cat-5e which were spliced together in about the worst possible manner... Then I left it to run 1080p material all day long and there wasn't a single dropout or flicker. HD-Base-T has basically become an industry standard which is used by Extron, Crestron, AMX, and a long list of other top-tier companies, but comes in at a very reasonable price for good quality at Monoprice.

You can run their garden hose HDMI cable up to 50' and if access is good, this will be the cheapest solution. I am using a 75' HDMI cable from my PS3 to my basement, then 50' back up to my display and I have zero issues whatsoever with it, so certainly it is possible with their good cables.


AV Integrated - Theater, whole house audio, and technology installation in the Washington DC metro area.
AV_Integrated is offline  
post #3 of 3 Old 09-20-2013, 04:13 AM
AVS Forum Special Member
Joe Fernand's Avatar
Join Date: Oct 2001
Location: Scotland, UK
Posts: 2,164
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 330 Post(s)
Liked: 199
Have you tried Source > Extender > Display and confirmed that option works across your cables?

Power to the Receiver – only the manufacturer of that product can confirm why they are powering the Receiver and what it is sending back (if anything) to the Transmitter.

Assuming you are in the UK you could give our Octava HDCATIR-UK a go – we have supplied them to customers using the same Matrix you are using and no reports of strange problems!



Octava Inc. Multi-cast HD over LAN solutions for Residential and Commercial installations.

The Media Factory. Residential and Commercial system Design, Consultancy, Installation, Supply and Integration.
Joe Fernand is offline  
Sponsored Links
Reply HDMI Q&A - The One Connector World

Iogear Cat5e 6 Extender

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page

Forum Jump: 

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off