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Standard User joconnell
(experienced) Thu 11-Oct-18 08:02:57
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Wired ethernet connection from PVR and TV


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I've connected both my Humax PVR and Samsung TV to my network using the RJ45 port that each has, but the TV reports that there's no cable connected and the PVR just refuses to use the wired connection and just falls back to using it WiFi connection.

On both units, the RJ45 port is adjacent to the HDMI ports so I'm wondering if the cat5e cables I've used are getting affected by RF interference from the HDMI connections?
Administrator MrSaffron
(staff) Thu 11-Oct-18 09:42:26
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Re: Wired ethernet connection from PVR and TV


[re: joconnell] [link to this post]
 
Interference scenario is unlikely, have you proved the cables work by connecting another device that has a known working Ethernet port?

The author of the above post is a thinkbroadband staff member. It may not constitute an official statement on behalf of thinkbroadband.
Standard User joconnell
(experienced) Thu 11-Oct-18 10:08:05
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Re: Wired ethernet connection from PVR and TV


[re: MrSaffron] [link to this post]
 
Yes, both cables were previously used to connect my router to a BT OR modem and to connect my router to a switch that drives the rest of the Ethernet network.

The reason I suspected interference is that the TV aerial cable previously used with the TV kept dropping the Freeview signal, replacing it with a known good cable made no difference - the fix was to make my own aerial cable with shielded solid core coax, which suggested that the issue was being caused by interference by the adjacent HDMI ports/connectors, so wondering if shielded CAT 5e might be needed for the Ethernet connections?


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Standard User billford
(elder) Thu 11-Oct-18 10:29:35
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Re: Wired ethernet connection from PVR and TV


[re: joconnell] [link to this post]
 
It's generally better (where possible) to stop interference getting out rather than getting in... have you tried a better quality (or even just another) HDMI cable?

Bill
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Administrator MrSaffron
(staff) Thu 11-Oct-18 10:30:45
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Re: Wired ethernet connection from PVR and TV


[re: joconnell] [link to this post]
 
If you think its interference then moving an Ethernet device e.g. laptop to the location of the of the devices and testing there may help identify that.

What was the aerial cable made of before? All coax I've used has a solid core and metal braided outer.

The author of the above post is a thinkbroadband staff member. It may not constitute an official statement on behalf of thinkbroadband.
Standard User adrenalize_
(newbie) Thu 11-Oct-18 10:54:00
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Re: Wired ethernet connection from PVR and TV


[re: joconnell] [link to this post]
 
IMHO There would have to be an extremely large amount of interference to stop the network connection negotiating even if dropped down to 10Mbps - I'd work back up the networking route with a laptop or similar to see where the networking gets to.
Administrator MrSaffron
(staff) Thu 11-Oct-18 12:19:28
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Re: Wired ethernet connection from PVR and TV


[re: adrenalize_] [link to this post]
 
One possibility is that the Ethernet cables are crossover ones, which many devices won't care about but some devices do.

The author of the above post is a thinkbroadband staff member. It may not constitute an official statement on behalf of thinkbroadband.
Standard User jabuzzard
(regular) Thu 11-Oct-18 12:56:23
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Re: Wired ethernet connection from PVR and TV


[re: MrSaffron] [link to this post]
 
In reply to a post by MrSaffron:
If you think its interference then moving an Ethernet device e.g. laptop to the location of the of the devices and testing there may help identify that.

What was the aerial cable made of before? All coax I've used has a solid core and metal braided outer.


Normally the leads that go between a faceplate in the wall and your TV for both satellite and terrestrial are stranded core coax. Much the same way as the mains lead for an appliance is stranded but the fixed wiring in the walls is solid core.
Standard User joconnell
(experienced) Thu 11-Oct-18 13:16:55
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Re: Wired ethernet connection from PVR and TV


[re: MrSaffron] [link to this post]
 
In reply to a post by MrSaffron:
If you think its interference then moving an Ethernet device e.g. laptop to the location of the of the devices and testing there may help identify that.

What was the aerial cable made of before? All coax I've used has a solid core and metal braided outer.
It was a flexible cable which I'd bet was braided core rather than solid core
Standard User joconnell
(experienced) Thu 11-Oct-18 13:19:08
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Re: Wired ethernet connection from PVR and TV


[re: billford] [link to this post]
 
In reply to a post by billford:
It's generally better (where possible) to stop interference getting out rather than getting in... have you tried a better quality (or even just another) HDMI cable?
The HDMI cable is a good quality one that I bought to replace the one that came with the TV.

I've since learned that the RF interference from an HDMI cable would be in the UHF frequency and so shouldn't affect a cat5e ethernet connection.
Standard User joconnell
(experienced) Thu 11-Oct-18 13:19:48
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Re: Wired ethernet connection from PVR and TV


[re: adrenalize_] [link to this post]
 
In reply to a post by adrenalize_:
IMHO There would have to be an extremely large amount of interference to stop the network connection negotiating even if dropped down to 10Mbps - I'd work back up the networking route with a laptop or similar to see where the networking gets to.
That'll be my next step
Standard User joconnell
(experienced) Thu 11-Oct-18 13:31:33
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Re: Wired ethernet connection from PVR and TV


[re: MrSaffron] [link to this post]
 
In reply to a post by MrSaffron:
One possibility is that the Ethernet cables are crossover ones, which many devices won't care about but some devices do.
That is possible, but the switch at the other end is a Cisco one that senses crossover cables and adjusts as needed so would be surprised is that's an issue, but I will get out my cable tester.

I wasn't having a very good day yesterday when moving my router from behind the TV and relocating it in the utility room. It started off well as the router is now in a more central location within the house and as a result, there's WiFi signal all around the house, which is great. But for some reason I'd first unplugged the existing cat5e cables from the wall-socket near the TV, then later on plugged them back in after connecting them to the PVR and TV but managed to plug in the first cable upside-down, thus destroying the spring connectors inside the RJ45 module and breaking the retention clip on the cable boot, so the cable is now useless. Cue ordering a replacement RJ45 module and some tricky replacement of the broken module, unless the damaged module is repairable?
Standard User joconnell
(experienced) Fri 12-Oct-18 15:51:27
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Re: Wired ethernet connection from PVR and TV


[re: joconnell] [link to this post]
 
I found the cause of the problem after testing the connection between the RJ45 sockets and the patch panel and found that a number of pins weren't transmitting any signal on both sockets. I can understand how that would've happened on one of the sockets as I'd previously tried to plug in a patch cable incorrectly, destroying the connectors in the the process, but the other socket had no such damage done. In fact I'd unplugged the router which used both sockets, one to receive the WAN connection, the other to connect the router to my gigabit switch and all worked fine until I unplugged the cables when moving the router.

Anyway, I replaced the two RJ45 modules (a bit of hassle as it's very fiddly and error prone) and all is now well - both PVR and TV connected via ethernet now and both more responsive with streaming services.

Thanks all for your help and info.
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