Hdmi over cat5’s

simpson93 · Feb 13, 2020

Afternoon all, wondering if anyone has used this product before -

https://cpc.farnell.com/clever-little-box/clb50-hdmi-t/conec2-screwless-hdmi-50mm/dp/AV24303

Ive wired hdmi points using 2x cat5e and the wiring diagram isnt much help.

[ElectriciansForums.net] Hdmi over cat5’s

Any thoughts other than replacing for a plugin converter

James · Feb 13, 2020

It is not hdmi over cat 5 converter.

It is expecting hdmi cable to be connected to it.

Choices are, add in an extra cable of the right spec.
Or buy hdmi over cat 5 converters

davesparks · Feb 13, 2020

As per James' post, you've installed the wrong cable. Your only option if the cable can't be replaced is to terminate one of the cat 5's with RJ45 connectors and use an ethernet to HDMI converter at each end.

simpson93 · Feb 13, 2020

Cheers guys will get the ethernet to hdmi adapters but surely it works in the same way? At the end of the day you've only got 16 cores with 2 cat5s. The ethernet to hdmi must use the same cores to corrospond to the hdmi outlet?

davesparks · Feb 13, 2020

simpson93 said:
Cheers guys will get the ethernet to hdmi adapters but surely it works in the same way? At the end of the day you've only got 16 cores with 2 cat5s. The ethernet to hdmi must use the same cores to corrospond to the hdmi outlet?

No, the HDMI cable carries an HDMI signal.
The HDMI to ethernet converter converts the HDMI signal to an ethernet data signal, which is transmitted over 2 pairs (4 wires) of the cat 5 cable and then converted back from the data signal to an HDMI signal.

garindan · Mar 15, 2020

davesparks said:
No, the HDMI cable carries an HDMI signal.
The HDMI to ethernet converter converts the HDMI signal to an ethernet data signal, which is transmitted over 2 pairs (4 wires) of the cat 5 cable and then converted back from the data signal to an HDMI signal.

@simpson93
Have you found and HDMI to CAT5 converter that actually works properly and doesn't cost loads of money? I've found the cheap ones to work but with unusable errors causing blips and colour issues.

freddo · Mar 15, 2020

They cheap ones can be troublesome. The ones that convert the signal to data and then back again are the most reliable, the ones that just try to jam the HDMI signal down the cable are not so good. I usually install Cat6 cable where possible as this can also reduce problems.

garindan · Mar 15, 2020

freddo said:
They cheap ones can be troublesome. The ones that convert the signal to data and then back again are the most reliable, the ones that just try to jam the HDMI signal down the cable are not so good. I usually install Cat6 cable where possible as this can also reduce problems.

I put in Cat6 cable and the cheap ones were useless. What are these other ones you are talking of? Are they the ones that are £50+ a unit?

freddo · Mar 15, 2020

Probably, but then again you get what you pay for. We were using some from a CCTV supplier about £70 I think, all worked faultlessly. I don't think they list them now though.

garindan · Mar 15, 2020

freddo said:
Probably, but then again you get what you pay for. We were using some from a CCTV supplier about £70 I think, all worked faultlessly. I don't think they list them now though.

Yeah. In my setting I'm looking at needing 12, so paying £70 each to accomplish this is just not an option. I've resorted to looking to remove the Cat6 twin cables I have in the wall and replacing them with HDMI v2.0 cables, chopping one end off so I can insert them through the capping and then putting a new 19 pin head on. It's going to be a real faff.

freddo · Mar 15, 2020

What signals are being sent, just from different devices to tvs? or 1 device and multiple tvs?

garindan · Mar 15, 2020

freddo said:
What signals are being sent, just from different devices to tvs? or 1 device and multiple tvs?

I've a TV on the wall with two HDMI ports behind it, as well as RJ45s and Aerial. The HDMI ports just pair to two further ports at standard wall height. Ports will be used for either consoles, set-top boxes or cinema surround sound. It's just avoiding anything looking ugly....!

Sorry but yes, one device per port....

Simon47 · Mar 23, 2020

davesparks said:
The HDMI to ethernet converter converts the HDMI signal to an ethernet data signal, which is transmitted over 2 pairs (4 wires) of the cat 5 cable and then converted back from the data signal to an HDMI signal

I rather doubt that, ethernet just doesn't have the bandwidth to carry HDMI - and 1Gbps ethernet uses all four pairs.
HDMI over Cat5e/6 extenders use passive components (cheap ones) or active electronics (better ones) to condition the signals to better match the cabling and minimise the distortion caused. If only one cable is used, then some signals have to share a pair, and AIUI this is why single cable extenders limit the video resolution/refresh rate. If two cables are used, then this limitation doesn't apply.

Jim_e_Jib · Mar 25, 2020

Probably not much use in the average domestic setting but HDBaseT is an accepted standard for sending digital video and audio, power and USB relatively long distances over Cat6 cable.