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Old 23.07.2017, 14:15
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Anybody have experience with Cable TV signal boosters?

I have digital TV service from a cable provider called SASAG. I assume it is similar to or based on Cablecom.

Due to the layout of my apartment the cable TV socket is at one side of the main room and we have the TV at the other side on the end of a 10M cable.
Occasionally we have breaks in the signal. Sasag investigated and said the signal level at our TV is marginal.

I am wondering if the 10M cable is an RG59 and moving to RG6 would improve it?
Written on the cable is EN 50117-2-4 23 MK76 CLASS A WISI 16 04 4 M 1628, I have no clue which RG this is.

The other possibility is to add an amplifier by the cable TV socket, there seem to be plenty of types available. Anybody have experience or advice here.
I have the "go back 7 days viewing" option and this seems the most sensitive to the problem. Edit - I assume for this to work there must be some sort of two way communication?

The set top box is a Kathrein, TechnoTrend, C2851
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Old 23.07.2017, 14:55
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Re: Anybody have experience with Cable TV signal boosters?

I don't know enough of the swiss telly system to provide you with a link to the perfect cable, but i do know that RG6 has a bad shielding for signals under 50Mhz, and HDTV mostly operates around 37Mhz, so RG6 is not your best solution. For video signals RG59 is still the way to go.

Personally and given that 10meters really ain't that long i'd just go to mediamarkt and but a new RG59 cable, if that does not fix problems you still can start looking into amplifiers.
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Old 23.07.2017, 14:58
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Re: Anybody have experience with Cable TV signal boosters?

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I am wondering if the 10M cable is an RG59 and moving to RG6 would improve it?
Written on the cable is EN 50117-2-4 23 MK76 CLASS A WISI 16 04 4 M 1628, I have no clue which RG this is.
RG6 has a thicker core conductor than RG59. RG59 is 0.8mm, RG6 is 1.0 (+/- 0.02mm in both cases)

Have you got a Vernier, or a cable known to be one or the other spec to compare with the one in question?

59 is usually ok for a short run, but 10m may well be too much for the frequencies you're using.

Are your dropouts irregular? What is on the other side of the wall? Microwaves and such sometimes cause problems if the SNR is marginal, or the signal is weak.
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Old 23.07.2017, 15:01
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Re: Anybody have experience with Cable TV signal boosters?

I'd go for a wireless link myself - indeed I still have one kicking around myself for potential use in the guest rooms. Each unit has an Ethernet connection, so just plug one into the router and one to the TV box and Bob's your uncle. Won't even need to change settings, as the box still thinks it's a cabled connection.

Then again, doesn't the box have wifi capability anyway?
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Old 23.07.2017, 15:11
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Re: Anybody have experience with Cable TV signal boosters?

Which of the 4 connection variants are you using Marton?
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Old 23.07.2017, 15:21
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Re: Anybody have experience with Cable TV signal boosters?

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Which of the 4 connection variants are you using Marton?
Variant 4 but on advice from SASAG without the splitter. The wifi router is plugged into a TV socket in another room.
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Old 23.07.2017, 15:29
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Re: Anybody have experience with Cable TV signal boosters?

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Variant 4 but on advice from SASAG without the splitter. The wifi router is plugged into a TV socket in another room.
And the wifi doesn't drop at the same time as the TV?

I'm a bit surprised that the SASAG guy didn't change the cable, add an amp, or make a concrete suggestion that you should do either of those.

How often do the drops happen?
Did the SASAG guy measure the signal at the TV socket as well and find it was within spec?
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Old 23.07.2017, 15:41
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Re: Anybody have experience with Cable TV signal boosters?

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And the wifi doesn't drop at the same time as the TV?

I'm a bit surprised that the SASAG guy didn't change the cable, add an amp, or make a concrete suggestion that you should do either of those.

How often do the drops happen?
Did the SASAG guy measure the signal at the TV socket as well and find it was within spec?
No, wifi is OK; does not drop at the same time as the TV. Anyway hard to tell with Ethernet connections where multiple retries are allowed.

The 10M cable is any way relatively new. I bought it when I changed the set top box earlier this year which needed F connectors.

Drops happen several times per day.

SASAG guy did measure at the socket; I assume was OK as nothing was mentioned - possible dangerous assumption!

He thought taking the splitter away would fix it.

The building was renovated in 1986 so I assume the internal cabling is at least that old, do not fancy trying to replace cabling in a building of which some structural parts are hundreds of years old.
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Old 23.07.2017, 16:16
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Re: Anybody have experience with Cable TV signal boosters?

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The other possibility is to add an amplifier by the cable TV socket, there seem to be plenty of types available. Anybody have experience or advice here.
I have the "go back 7 days viewing" option and this seems the most sensitive to the problem. Edit - I assume for this to work there must be some sort of two way communication?
Correct, the amplifier would need to provide a back channel. Something which was not needed in the past and may not be provided by all amplifiers. Also the amplifier would need to have a wide enough spectrum. Normally, the amplifier in the basement should provide a strong enough signal.

You mention a splitter. Is this used to connect cable modem and receiver to the very same socket? Is it a simple T-splitter or is it like the special splitter from UPC? See http://wwwch.upc.ch/techn_info_multimedia_services.pdf

Do you know what kind of socket you have:
- Radio/TV, Radio/TV/Modem, or dual Broadband with back channel?
- Bandwidth of the socket?
- If it is an end socket or a bypass socket?
- If it is a bypass socket do you know the attenuation?
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Old 23.07.2017, 17:06
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Re: Anybody have experience with Cable TV signal boosters?

Marton,

You could try replacing the cable, but 10m is the max, and if the distribution in the house is pre digital then the signal at the socket may already be weak.

I'd try a powered amp at the socket, like this you'll need a wall wart to drive the amp, and a short coax to get from the socket to the amp.

(You want the amp at the socket end of the cable, not at the STB end.)
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