Hello, I searched the topics related to RTV / SAT sockets, but I am still not sure which antenna socket should I choose. * The installation is in a single-family house * The cable will be directly connected to the multiswitch at the antenna (probably the length of the cable between the...

I still read and finally found an explanation - * end socket is used for star type installation (without through socket) * termination socket is used for serial installations

It all depends on the signal level at the input to the socket. 20 m of a good cable means a loss of about 6 dB. If the level is still too high, and it should be remembered that we have to fit in the band, about 48-74dB (at the outlet from the socket), it will have to be suppressed so as not to distort the head in the receiver, i.e. use an end socket with greater attenuation. We try to aim with the signal level m / w in the middle of the range, that is about 60dB

I will want to use such a Terra MR508 multiswitch. Cables in a single-family house as a colleague wrote and placed in a star. I think also about 20-25m What end sockets to buy with what attenuation? I want 1.5dB for the living room And I don't know other rooms: Is 10dB Is 2 dB Gwiazda-2db-bialy-764563,id8831.html Please help.

So I can safely take what I showed ...?

After all, I wrote that you can. Typical RTV / SAT sockets - the first for a two-cable SAT installation (but you can also use a single-cable one), the second - standard - for one cable (SAT + TV).

OK thanks Because you gave me a second link to the 10dB socket ...

Oh, indeed. Sorry. I meant a sale, but something is sticking badly, or they are changing on the website

There are no sensational prices, you can buy better.

what to choose the attenuation of RTV / SAT sockets - 1.5dB or 10dB

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#1 16662486 25 Aug 2017 13:04

ad_min ad_min

Level 12

» | Topic author

Post #1
16662486 25 Aug 2017 13:04

Hello,
I searched the topics related to RTV / SAT sockets, but I am still not sure which antenna socket should I choose.

* The installation is in a single-family house
* The cable will be directly connected to the multiswitch at the antenna (probably the length of the cable between the multiswitch and the socket is about 15-20 meters)
* I would like a socket with 3 outputs (RTV / SAT)
* I don't know what device will be connected to it yet
* I do not know the parameters of the antenna or the device (multiswitch) yet

What attenuation should I choose 1.5dB or 10dB?
* http://elektralnie.pl/szukaj/valifb-gn-tv-rd-sat-zakoncz.html " target="_blank" rel="nofollow noopener ugc" class="postlink inline" title="" > http://elektralnie.pl/szukaj/valifb-gn-tv-rd-sat-zakoncz.html
* https://elektralnie.pl/szukaj/valifb-gn-tv-rd-sat-konco.html " target="_blank" rel="nofollow noopener ugc" class="postlink inline" title="" > https://elektralnie.pl/szukaj/valifb-gn-tv-rd-sat-konco.html

From what I understand, the amount of attenuation needed may be related to the signal strength from the multiswitch, cable length and the receiver itself.
I currently only know the length of the cable.
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#2 16662587 25 Aug 2017 14:07

andpol 33 andpol 33

Level 39

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Post #2
16662587 25 Aug 2017 14:07

Definitely with less damping.
#3 16662610 25 Aug 2017 14:21

ad_min ad_min

Level 12

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Post #3
16662610 25 Aug 2017 14:21

I still read and finally found an explanation -
* end socket is used for star type installation (without through socket)
* termination socket is used for serial installations
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#4 16667395 28 Aug 2017 08:36

TELMOR_PL TELMOR_PL

Level 32

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Post #4
16667395 28 Aug 2017 08:36

It all depends on the signal level at the input to the socket. 20 m of a good cable means a loss of about 6 dB. If the level is still too high, and it should be remembered that we have to fit in the band, about 48-74dB (at the outlet from the socket), it will have to be suppressed so as not to distort the head in the receiver, i.e. use an end socket with greater attenuation. We try to "aim" with the signal level m / w in the middle of the range, that is about 60dB
#5 18402236 14 Jan 2020 11:54

pepe_lodz pepe_lodz

Level 15

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Post #5
18402236 14 Jan 2020 11:54

I will want to use such a Terra MR508 multiswitch.
https://www.dipol.com.pl/multiswitch_mr-508_t...owy_8-wyjsciowy_z_aktywna_naziemna_R70608.htm
Cables in a single-family house as a colleague wrote and placed in a star. I think also about 20-25m
What end sockets to buy with what attenuation?

I want 1.5dB for the living room
https://elektro-hurt.com/legrand-niloe-gyszne...at-sat-koncowe-1-5db-bialy-764566,id8834.html

And I don't know other rooms:
Is 10dB
https://elektro-hurt.com/legrand-niloe-gyszne-tv-rd-sat-koncowe-10db-bialy-764565,id8833.html

Is 2 dB
https://elektro-hurt.com/legrand-niloe-gźdzo-tv-rd-sat-g Gwiazda-2db-bialy-764563,id8831.html

Please help.
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#6 18403576 14 Jan 2020 21:24

Anonymous Anonymous

Level 1

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Post #6
18403576 14 Jan 2020 21:24

pepe_lodz wrote:
I want 1.5dB for the living room
https://elektro-hurt.com/legra...1-5db-bialy-764566,id8834.html
May be. Sale

pepe_lodz wrote:
Is 2 dB
https://elektro-hurt.com/legra...a-2db-bialy-764563,id8831.html
May be. Sale
#7 18403904 14 Jan 2020 23:49

pepe_lodz pepe_lodz

Level 15

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Post #7
18403904 14 Jan 2020 23:49

So I can safely take what I showed ...?
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#8 18404336 15 Jan 2020 10:47

Anonymous Anonymous

Level 1

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Post #8
18404336 15 Jan 2020 10:47

pepe_lodz wrote:
So I can safely take what I showed ...?
After all, I wrote that you can. Typical RTV / SAT sockets - the first for a two-cable SAT installation (but you can also use a single-cable one), the second - standard - for one cable (SAT + TV).
#9 18404354 15 Jan 2020 10:56

pepe_lodz pepe_lodz

Level 15

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Post #9
18404354 15 Jan 2020 10:56

OK thanks
Because you gave me a second link to the 10dB socket ...
#10 18404382 15 Jan 2020 11:08

Anonymous Anonymous

Level 1

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Post #10
18404382 15 Jan 2020 11:08

pepe_lodz wrote:
Because you gave me a second link to the 10dB socket ...
Oh, indeed. Sorry. I meant a sale, but something is sticking badly, or they are changing on the website
#11 18404409 15 Jan 2020 11:20

pepe_lodz pepe_lodz

Level 15

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Post #11
18404409 15 Jan 2020 11:20

There are no sensational prices, you can buy better.
#12 18404759 15 Jan 2020 14:17

irekr irekr

VIP Meritorious for electroda.pl

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Post #12
18404759 15 Jan 2020 14:17

I closed the topic as archival.
Regulations:
3.1. In particular, it is forbidden to:
....
3.1.19. Publishing entries in archival discussions.

I will add from myself, I wrote about it once: the terminal sockets (with the attenuation introduced for the VHF / UHF band, never SAT) are mainly produced for the German and French market, where the cable signal distribution of local / operator networks with "gluing" of local building networks is used satellite installation. Quite a popular solution wherever there are "national minorities" using SAT positions other than eg Astra or Eutelsat W5 A popular solution, for example in Berlin in Kreuzberg, Paris 18th district or Saint Denis near Paris.
In Polish conditions, the use of attenuated sockets does not make much sense if multiswich is used, where the VHF-UHF signal levels are locally controlled.
On the other hand, there are "collective" houses built as if "hybrid", where the existing installations of the old type - in series from apartment to apartment - are fitted with cables going to the multiswich and supporting almost exclusively satellite signals - sometimes also cable operators. But then it is clearly stated that it is a through socket.
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Topic summary

✨ The discussion revolves around the choice of attenuation for RTV/SAT sockets in a single-family house installation. The user is uncertain whether to select sockets with 1.5dB or 10dB attenuation, considering a cable length of approximately 15-20 meters connected to a multiswitch. Responses indicate that the choice of attenuation depends on the signal level at the socket's input, with recommendations leaning towards lower attenuation (1.5dB) for optimal signal quality. It is noted that 20 meters of good quality cable results in about 6dB loss, and the goal is to maintain a signal level around 60dB at the socket output. The discussion also touches on the types of sockets suitable for different installation configurations, emphasizing the importance of matching the socket type to the installation method (star vs. serial).
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FAQ

TL;DR: For star-wired RTV/SAT outlets on 15–25 m runs, assume ~6 dB loss per 20 m and “aim … about 60 dB.” Choose the smallest socket attenuation that still lands within 48–74 dB at the outlet. [Elektroda, TELMOR_PL, post #16667395]

Why it matters: Picking 1.5 dB vs 10 dB affects picture quality and avoids receiver overload in multiswitch systems; this FAQ helps homeowners and installers size attenuation confidently.

Quick Facts

Target outlet level: approx. 60 dB within a safe 48–74 dB window for terrestrial bands. [Elektroda, TELMOR_PL, post #16667395]
Approx. coax loss: ~6 dB over 20 m with good cable; factor this before choosing socket attenuation. [Elektroda, TELMOR_PL, post #16667395]
End (terminal) sockets are for star installations; through sockets are for serial (loop-through) runs. [Elektroda, ad_min, post #16662610]
Attenuated outlet elements act on VHF/UHF (TV/FM), not on the SAT path. [Elektroda, irekr, post #18404759]
In multiswitch systems, attenuated sockets are rarely needed if levels are locally controlled. [Elektroda, irekr, post #18404759]

Which attenuation should I choose: 1.5 dB or 10 dB for an RTV/SAT end socket?

Use the least attenuation that keeps the outlet within 48–74 dB. With 15–25 m of quality coax (≈6 dB/20 m), 1.5–2 dB usually fits better than 10 dB. Overshooting risks under‑level signals; undershooting can overdrive the tuner. Aim near 60 dB at the outlet. [Elektroda, TELMOR_PL, post #16667395]

How do I size attenuation if I only know cable length?

Estimate cable loss, then pick the smallest socket attenuation that centers the outlet near 60 dB. Example: 20 m run ≈6 dB loss; if the multiswitch output is strong, 1.5–2 dB may still land you near 60 dB, avoiding overload. “We try to aim … about 60 dB.” [Elektroda, TELMOR_PL, post #16667395]

What level should I target at the socket for DVB‑T/T2?

Target roughly mid‑range, about 60 dB, staying within 48–74 dB at the outlet. This avoids both noise‑floor issues and tuner overload. If you measure above the window, add attenuation; if below, reduce it. [Elektroda, TELMOR_PL, post #16667395]

What’s the difference between an end socket and a through socket?

End (terminal) sockets finish a star branch and do not pass signal onward. Through sockets sit mid‑run in serial (loop‑through) wiring and include pass‑through plus defined tap loss. Pick end sockets for star, through sockets for serial. [Elektroda, ad_min, post #16662610]

Does a 10 dB RTV/SAT socket also attenuate the SAT output?

No. The specified attenuation applies to the VHF/UHF TV/FM path. The SAT leg remains effectively unattenuated by that element. This design prevents starving LNB-fed SAT signals while trimming terrestrial levels. [Elektroda, irekr, post #18404759]

Are attenuated sockets necessary in multiswitch installs?

Often no. Multiswitch systems usually control local VHF/UHF levels, so added outlet attenuation brings limited benefit. As one expert notes, “the use of attenuated sockets does not make much sense if multiswitch is used.” [Elektroda, irekr, post #18404759]

I’m using a Terra MR508 and 20–25 m runs—what should I buy?

Start with 1.5–2 dB end sockets in main rooms. Verify outlet levels; adjust only if measurements exceed the 48–74 dB window. This approach keeps you near the 60 dB target without unnecessary loss. [Elektroda, TELMOR_PL, post #16667395]

Can I mix 1.5 dB in the living room and 2 dB elsewhere?

Yes. Use lower attenuation where longer or higher‑priority runs need margin. Community guidance confirmed 1.5 dB and 2 dB as acceptable standard RTV/SAT end sockets for star wiring. [Elektroda, Anonymous, post #18404336]

What happens if the level is too high at the outlet?

You can distort the tuner front end (“the head in the receiver”). Symptoms include pixelation or dropouts despite strong readings. Add attenuation to bring the outlet back within the 48–74 dB window. [Elektroda, TELMOR_PL, post #16667395]

How do I choose between 1.5 dB and 10 dB when unsure of device specs?

Default to less damping. It preserves margin, especially on 15–25 m runs. If later measurements show excess level, step up attenuation. Excessive fixed loss is harder to recover without amplifiers. [Elektroda, andpol 33, post #16662587]

Do attenuated outlets exist for specific markets or use cases?

Yes. They’re common where cable TV networks blend with building SAT distribution, notably in parts of Germany and France. Typical multiswitch‑only homes don’t need them when levels are managed. [Elektroda, irekr, post #18404759]

Is there a quick method to size socket attenuation without a meter?

Use a three-step estimate: 1) Compute cable loss (~6 dB/20 m). 2) Check multiswitch output spec or installer notes. 3) Pick the smallest outlet attenuation that keeps the estimated outlet near 60 dB. Validate later with measurements. [Elektroda, TELMOR_PL, post #16667395]

Will using the wrong socket type hurt performance?

Yes. Using a through socket in a star run adds unnecessary loss and mismatch; using an end socket mid‑chain breaks serial distribution. Match end sockets to star, through sockets to serial. [Elektroda, ad_min, post #16662610]

What’s a practical failure case to watch for after installation?

If channels pixelate after adding a high‑loss outlet (e.g., 10 dB) on a long run, the outlet level likely fell below 48 dB. Swap to a 1.5–2 dB model to restore headroom. [Elektroda, TELMOR_PL, post #16667395]

Are there any buying notes from the thread?

Contributors confirmed the shown 1.5 dB and 2 dB Legrand end sockets as suitable picks for star‑wired RTV/SAT. Choose based on measured or estimated levels per room. [Elektroda, Anonymous, post #18403576]

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