Hello, I would like to drag the internet to another room in the apartment. I can't do it at home so I have to let the cable go outside. Does the type of coaxial cable affect the speed of the internet or something else, if so, which one to choose? Regards sebaele22

Hello It's ok, when Receive jumps by a few decibels, something may be damaged, it's good for you. kisses

First, it's probably not coaxial Apply shielded twisted FTP cable and shield to ground. The cost of 1 m is about 1.50.

Write what internet provider you have, draw a diagram, lengths, equipment. kisses

Of course the coaxial cable, my ISP is Vectra cable TV.

If you are moving the modem to a new place (without dividing it into an additional computer), you can use a typical SAT antenna cable - about PLN 1.5 / meter. You have not written what episode, you can pull up to 100m depending on the signal. (use F plugs and barrel for connections) kisses

So I want to move the modem to another place and only connect one computer, and the distance is about 40m. Will there be some interference on the ordinary antenna cable?

Check the readings on the modem - go to the page: 192.168.100.1 If you earn the cable well, wind up the F's, connect and the modem parameters will be in reserve - it will be ok. Kisses

I went to this page: 192.168.100.1 and what next? Sory but I would like an explanation.

What are your levels Power level Recieve Level, see upstream, downstream parameters

It is like this with me: If wrong, how should it be and where are these upstream and downstream parameters?

You cannot move this modem at these levels. 40m of cable + connectors - you already have too little of the longstream. Report that you have problems with the internet to your operator, that your incoming signal is at -19 - and -15dB is acceptable. Kisses

Choosing the Right Coaxial Cable for Internet Connection: Speed & Outdoor Usage - sebaele22 Inquiry

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Best answers

Can I move my cable modem to another room with a 40 m coaxial cable, and does the cable type affect internet speed or signal quality?

Yes—the cable mainly affects attenuation and signal quality, so use a proper 75-ohm SAT antenna coaxial cable with good F connectors; a 40 m run can work, but the modem’s signal levels are what really matter [#6207187][#6210020] If you only move the modem and connect one computer, a typical SAT cable is enough, with F plugs and a barrel for joins [#6207187] Check the modem at 192.168.100.1 and look at Receive Power Level, Transmit/Upstream, and Downstream values; around -15 dB receive was said to be acceptable, while -19 dB was already too low for extending the line further [#6210020] The return channel should stay below about 58 dB; up to 60 dB may still work, but it is considered an extreme level to avoid [#6252063] Later, a Receive Power Level around +6 dBmV was considered OK, and if the values stay in range you should not worry [#6249867][#6863063] If the readings worsen after replacing the cable, the cause may be the new cable’s electrical parameters, bad plugs, or a network/frequency change rather than the coax itself [#6860207]

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#1 6206932 26 Feb 2009 13:04

sebaele22 sebaele22

Level 30

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Post #1
6206932 26 Feb 2009 13:04

Hello, I would like to drag the internet to another room in the apartment. I can't do it at home so I have to let the cable go outside. Does the type of coaxial cable affect the speed of the internet or something else, if so, which one to choose?

Regards sebaele22
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#2 6206996 26 Feb 2009 13:18

shadow125 shadow125

Level 21

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Post #2
6206996 26 Feb 2009 13:18

First, it's probably not coaxial
Apply "shielded twisted FTP cable" and shield to ground.
The cost of 1 m is about 1.50.
#3 6207074 26 Feb 2009 13:40

kasprzyk kasprzyk

Electrician specialist

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Post #3
6207074 26 Feb 2009 13:40

Write what internet provider you have, draw a diagram, lengths, equipment.
kisses
#4 6207107 26 Feb 2009 13:46

sebaele22 sebaele22

Level 30

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Post #4
6207107 26 Feb 2009 13:46

Of course the coaxial cable, my ISP is "Vectra" cable TV.
#5 6207187 26 Feb 2009 14:04

kasprzyk kasprzyk

Electrician specialist

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Post #5
6207187 26 Feb 2009 14:04

If you are moving the modem to a new place (without dividing it into an additional computer), you can use a typical SAT antenna cable - about PLN 1.5 / meter. You have not written what episode, you can pull up to 100m depending on the signal. (use F plugs and barrel for connections)

kisses
#6 6207211 26 Feb 2009 14:12

sebaele22 sebaele22

Level 30

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Post #6
6207211 26 Feb 2009 14:12

So I want to move the modem to another place and only connect one computer, and the distance is about 40m. Will there be some interference on the ordinary antenna cable?
#7 6208243 26 Feb 2009 18:03

kasprzyk kasprzyk

Electrician specialist

» | Helpful post? (+1)

Post #7
6208243 26 Feb 2009 18:03

Check the readings on the modem - go to the page: 192.168.100.1
If you earn the cable well, wind up the F's, connect and the modem parameters will be in reserve - it will be ok.

Kisses
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#8 6209641 26 Feb 2009 21:46

sebaele22 sebaele22

Level 30

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Post #8
6209641 26 Feb 2009 21:46

I went to this page: 192.168.100.1 and what next? Sory but I would like an explanation.
#9 6209949 26 Feb 2009 22:30

kasprzyk kasprzyk

Electrician specialist

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Post #9
6209949 26 Feb 2009 22:30

What are your levels

Power level
Recieve Level,

see upstream, downstream parameters
#10 6209993 26 Feb 2009 22:40

sebaele22 sebaele22

Level 30

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Post #10
6209993 26 Feb 2009 22:40

It is like this with me:

If wrong, how should it be and where are these upstream and downstream parameters?
#11 6210020 26 Feb 2009 22:44

kasprzyk kasprzyk

Electrician specialist

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Post #11
6210020 26 Feb 2009 22:44

You cannot move this modem at these levels. 40m of cable + connectors - you already have too little of the longstream.
Report that you have problems with the internet to your operator, that your incoming signal is at -19 - and -15dB is acceptable.

Kisses
#12 6210057 26 Feb 2009 22:49

sebaele22 sebaele22

Level 30

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Post #12
6210057 26 Feb 2009 22:49

What should the parameters of the incoming signal be and what does Receive Power Level and Transmit Power Level mean?

What should the parameters be?
#13 6248989 07 Mar 2009 16:54

sebaele22 sebaele22

Level 30

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Post #13
6248989 07 Mar 2009 16:54

Hello, I connected everything again and got a signal like this:

Sometimes Receive Power Level changes to 6 dBmV, are the parameters correct?
Helpful post

#14 6249867 07 Mar 2009 20:07

kasprzyk kasprzyk

Electrician specialist

» | Helpful post? (+2)

Helpful post
Post #14
6249867 07 Mar 2009 20:07

Hello

It's ok, when Receive jumps by a few decibels, something may be damaged, it's good for you.
kisses
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#15 6249980 07 Mar 2009 20:31

sebaele22 sebaele22

Level 30

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Post #15
6249980 07 Mar 2009 20:31

Thanks, and what should be the biggest Receive signal and is there any possibility to increase it?
#16 6250242 07 Mar 2009 21:20

kasprzyk kasprzyk

Electrician specialist

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Post #16
6250242 07 Mar 2009 21:20

A maximum of +15 dB is recommended. The signal can be increased by the operator (on the amplifiers, or by reducing the attenuation to you) or by using an amplifier in the apartment - but it's better not to do this just consult the operator - you can "mess" with the TV or the Internet.

kisses
#17 6250544 07 Mar 2009 22:13

sebaele22 sebaele22

Level 30

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Post #17
6250544 07 Mar 2009 22:13

And what do you mean to use an amplifier in the apartment?
#18 6251056 07 Mar 2009 23:47

kasprzyk kasprzyk

Electrician specialist

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Post #18
6251056 07 Mar 2009 23:47

It has to be an amplifier with a return path, we only use building ones, e.g. AMIGO M 865 P30.
You will amplify the forward signal, but you are still limited by the upstream - that is, the return channel you have at 50dB - but exactly what do you need it for, is it an extension of the antenna cable?
#19 6251085 07 Mar 2009 23:55

Anonymous Anonymous

Anonymous

» |

Post #19
6251085 07 Mar 2009 23:55

Sorry for offtop.
But is it possible to check something like this in the Motorola SB5101 modem?
#20 6251112 08 Mar 2009 00:02

kasprzyk kasprzyk

Electrician specialist

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Post #20
6251112 08 Mar 2009 00:02

hubertp wrote:
Sorry for offtop.
But is it possible to check something like this in the Motorola SB5101 modem?

Try to go to the modem page 192.168.100.1
#21 6251135 08 Mar 2009 00:07

Anonymous Anonymous

Anonymous

» |

Post #21
6251135 08 Mar 2009 00:07

I don't know why, but I have something like about: blank, which is nothing.
I've tried before.
Computer directly connected to the modem via RJ-45.
The page loads quickly, but for example 192.168.100.2 it can't.
Maybe my provider blocked it.

Added after 30 [seconds]:

Pings also do not arrive.
#22 6251149 08 Mar 2009 00:11

sebaele22 sebaele22

Level 30

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Post #22
6251149 08 Mar 2009 00:11

Does this signal have any influence on the link speed? If so, I'd like to make it stronger! And is the feedback channel at a good level?
#23 6252063 08 Mar 2009 11:13

kasprzyk kasprzyk

Electrician specialist

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Post #23
6252063 08 Mar 2009 11:13

sebaele22 wrote:
Does this signal have any influence on the link speed? If so, I'd like to make it stronger! And is the feedback channel at a good level?

At the moment everything is fine, you will not feel any difference until -15 (the SNR parameter is also important - but you will not read it on this page, unless you have other tabs available) return channel max recommended 58dB (in practice it works even up to 60 dB - but such an extreme level is avoided)

Kisses
#24 6252147 08 Mar 2009 11:31

Anonymous Anonymous

Anonymous

» |

Post #24
6252147 08 Mar 2009 11:31

Is it possible to check it with me?
#25 6252183 08 Mar 2009 11:39

kasprzyk kasprzyk

Electrician specialist

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Post #25
6252183 08 Mar 2009 11:39

hubertp wrote:
Is it possible to check it with me?

as you wrote, it is probably blocked, only available to the operator.
try restarting the modem, a moment before logging in, some information may appear.

kisses
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#26 6252433 08 Mar 2009 12:30

sebaele22 sebaele22

Level 30

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Post #26
6252433 08 Mar 2009 12:30

I do not have any tabs available, it means that my return and feedback signal is good, do not worry about anything?
#27 6252739 08 Mar 2009 13:30

Anonymous Anonymous

Anonymous

» |

Post #27
6252739 08 Mar 2009 13:30

If the modem is not logged in, i.e. the Online LED is flashing or not lit, you can enter there.
There are even some settings.
#28 6860115 05 Aug 2009 16:20

sebaele22 sebaele22

Level 30

» | Topic author Helpful post? (0)

Post #28
6860115 05 Aug 2009 16:20

Hello again, some time ago I replaced the coaxial cables from the Internet and the Receive Power Level signal deteriorated:

What could it be to blame!
#29 6860158 05 Aug 2009 16:33

kasprzyk kasprzyk

Electrician specialist

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Post #29
6860158 05 Aug 2009 16:33

how many have you had before
#30 6860165 05 Aug 2009 16:37

sebaele22 sebaele22

Level 30

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Post #30
6860165 05 Aug 2009 16:37

Before replacing the cable, I had this:

I would like to add that I replaced the coaxial cables with a copper wire inside, and earlier I had a steel wire (whitewashed copper).
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Topic summary

✨ The discussion revolves around the selection of coaxial cables for extending internet connections outdoors. The user seeks advice on whether the type of coaxial cable impacts internet speed and which cable to choose for a 40m distance. Responses suggest using standard SAT antenna cables, with recommendations for connectors and potential signal loss over long distances. Users discuss the importance of checking modem parameters, such as Receive Power Level and upstream/downstream metrics, to ensure optimal performance. The conversation also touches on the use of amplifiers to boost signal strength and the implications of different cable materials on signal quality.
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FAQ

TL;DR: Up to 100 m of RG-6 satellite-grade coax keeps full DOCSIS speed; “use a typical SAT antenna cable” [Elektroda, kasprzyk, post #6207187] Check modem levels (-15 to +15 dBmV) before relocating.

Why it matters: The right cable and signal level prevent random disconnects when you move a cable-TV internet modem outdoors.

Quick Facts

• RG-6 Cu-core coax price: ~PLN 1.5 per m [Elektroda, shadow125, post #6206996] • Safe modem downstream: ‑15 to +15 dBmV [CableLabs, 2021]. • Upstream should stay < 58 dBmV for stability [Elektroda, kasprzyk, post #6252063] • Shielded twisted-pair (FTP) works for Ethernet, not cable-TV internet [Elektroda, shadow125, post #6206996] • Outdoor run length limit: ≈100 m before amp needed [Elektroda, kasprzyk, post #6207187]

What kind of cable should I use to move a Vectra cable-modem to another room?

Use RG-6 or other satellite-grade 75 Ω coax with a solid copper center to minimize loss. F-type connectors and weatherproof boots ensure a tight RF seal [Elektroda, kasprzyk, post #6207187]

Does the coax type affect my internet speed?

Speed stays unchanged if receive power remains between ‑15 and +15 dBmV. Poor cable raises attenuation, pushing levels below ‑15 dBmV and causing dropouts, not slower nominal speed [CableLabs, 2021; Elektroda, kasprzyk, #6210020].

How far can I run the coax without an amplifier?

With good RG-6 you can run about 100 m before downstream power usually falls >3 dB and risks going below spec [Elektroda, kasprzyk, post #6207187] Edge-case: thin RG-59 may halve that distance.

Will shielded twisted pair (FTP) work for this application?

No. FTP is for Ethernet. Vectra uses RF over 75 Ω coax; twisted pair will not carry the DOCSIS signal [Elektroda, shadow125, post #6206996]

How do I check my Motorola cable-modem signal levels?

Connect a PC directly to the modem.
Browse to http://192.168.100.1 before the Online LED turns solid.
Read Receive (downstream) and Transmit (upstream) power values [Elektroda, kasprzyk, post #6208243]

What Receive Power Level should I aim for?

Target 0 dBmV; the acceptable window is ‑15 to +15 dBmV. Values below ‑15 dBmV double packet loss odds [CableLabs, 2021].

My Receive jumps by 6 dB—cause for concern?

Small swings (±6 dB) are normal and often temperature-related. Continuous swings >10 dB hint at damaged splitters or moisture-filled cable [Elektroda, kasprzyk, post #6249867]

Can I boost the signal myself with a home amplifier?

You need a return-path amplifier such as AMIGO M 865 P30. It lifts downstream but upstream may still max out at 58 dBmV, so consult the ISP first [Elektroda, kasprzyk, post #6251056]

Do coax Tees or splitters degrade internet levels?

Yes. Each 2-way splitter adds about 3.5 dB loss. A faulty splitter was blamed when Receive dropped from 3 dBmV to ‑7 dBmV after cable changes [Elektroda, sebaele22, post #6860165]

Will better copper-core coax always improve my signal?

Usually, but if connectors are poorly crimped or water-logged, signal may still worsen—as seen when copper replacement led to a 10 dB drop [Elektroda, 6860165]

Does signal level change my download speed tier?

Speed profile comes from DOCSIS provisioning. Signal out of spec causes retries or modem reboots, not a different tier [Elektroda, kasprzyk, post #6252063]

What’s the risk if upstream power exceeds 58 dBmV?

The modem may fail to reach the CMTS, leading to intermittent upload or total offline status; manufacturers flag >61 dBmV as critical [Arris, 2020].

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