Getting break up/interference on a lot of channels

[kegnkiwi]

I've got a genuine sub with vm but did a tv install myself. I split the cable and then run a satellite/coax cable under the house to the back of the V6 Box. We are getting great internet 380mb and all the tv channels are there. Signal is between 94-100% and the db rating it between 35 & 41%. I think I have a problem with electrical interference because i have a router, wireless telephone, burglar alarm power supply and homeplugs all running very close together. I've tried moving tv feed further away and shielding the cable. Virgins call out charge is £65.00 as I don't think you're allowed to enter the brown virgin box. I just bought a powered splitter. I've just bought one of these Virgin Media cable/signal booster CATV 2 port Technetix HDU-200 | eBay on ebay to try before i call virgin out. Anyone any further ideas?

 

[Ferret.]

Have you checked the Signal/power readings in the hub to make sure there in range ?

You may have too much kit on your line and may need to be placed on a higher tap in the box.

 

[kegnkiwi]

Have you checked the Signal/power readings in the hub to make sure there in range ?

You may have too much kit on your line and may need to be placed on a higher tap in the box.

Never heard about this ill see if i can get into the router tonight and try and find out where this information is.

 

[Ferret.]

Never heard about this ill see if i can get into the router tonight and try and find out where this information is.

Youll need your hub back in hub mode not modem mode login and check the power levels upstream and downstream.

That will tell us if your on a weaker tap than you should be, reporting figures out of spec will force a free call out from Virgin.

 

[kegnkiwi]

Mines not in modem mode mate so i will get into the router and find out what's going on. I report back later.

 

[steptoe]

What sort of coax did you use,?
Don't say RG6 , RG59, or the like, the actual brand and type,
eg , WF100 , CT100 , or whatever it may have been.

 

[kegnkiwi]

What sort of coax did you use,?
Don't say RG6 , RG59, or the like, the actual brand and type,
eg , WF100 , CT100 , or whatever it may have been.

Ha Ha, I've no idea at the moment I'm in the office. I'll look later i bought 100m's of it years ago. I have no issues using it for satellite stuff.

 

[kegnkiwi]

ferret do any of these make any sense.

Channel	Frequency (Hz)	Power (dBmV)	SNR (dB)	Modulation	Channel ID
1​	339000000​	-9.9​	35​	256 qam​	26​
2​	203000000​	-9.2​	36​	256 qam​	9​
3​	211000000​	-9.2​	35​	256 qam​	10​
4​	219000000​	-9.2​	35​	256 qam​	11​
5​	227000000​	-9.4​	35​	256 qam​	12​
6​	235000000​	-9.5​	36​	256 qam​	13​
7​	243000000​	-9.7​	36​	256 qam​	14​
8​	251000000​	-9.7​	36​	256 qam​	15​
9​	259000000​	-10​	36​	256 qam​	16​
10​	267000000​	-10​	36​	256 qam​	17​
11​	275000000​	-10.2​	36​	256 qam​	18​
12​	283000000​	-10.2​	36​	256 qam​	19​
13​	291000000​	-10.4​	36​	256 qam​	20​
14​	299000000​	-10.2​	36​	256 qam​	21​
15​	307000000​	-10​	36​	256 qam​	22​
16​	315000000​	-9.9​	36​	256 qam​	23​
17​	323000000​	-9.9​	36​	256 qam​	24​
18​	331000000​	-9.7​	35​	256 qam​	25​
19​	347000000​	-9.5​	36​	256 qam​	27​
20​	355000000​	-9.5​	36​	256 qam​	28​
21​	363000000​	-9.4​	36​	256 qam​	29​
22​	371000000​	-9.4​	36​	256 qam​	30​
23​	379000000​	-9​	37​	256 qam​	31​
24​	387000000​	-9​	37​	256 qam​	32​

Downstream bonded channels​

Channel	Locked Status	RxMER (dB)	Pre RS Errors	Post RS Errors
1​	Locked​	35.7​	60387​	23​
2​	Locked​	36.3​	331614​	101​
3​	Locked​	35.7​	780201​	300​
4​	Locked​	35.7​	234261​	240​
5​	Locked​	35​	2856339​	82​
6​	Locked​	36.6​	70427​	208​
7​	Locked​	36.6​	45271​	211​
8​	Locked​	36.6​	146734​	238​
9​	Locked​	36.6​	132016​	5475​
10​	Locked​	36.6​	85236​	270​
11​	Locked​	36.6​	5442​	57​
12​	Locked​	36.6​	5883​	62​
13​	Locked​	36.3​	8218​	8​
14​	Locked​	36.3​	11310​	0​
15​	Locked​	36.3​	12188​	0​
16​	Locked​	36.6​	20213​	0​
17​	Locked​	36.3​	51810​	1​
18​	Locked​	35.7​	46594​	9​
19​	Locked​	36.3​	35929​	36​
20​	Locked​	36.6​	21656​	30​
21​	Locked​	36.3​	14446​	12​
22​	Locked​	36.6​	8381​	1​
23​	Locked​	37.3​	3932​	0​
24​	Locked​	37.3​	2383​	3​

1​	53700000​	43.5​	5120​	64 qam​	2​
2​	39400000​	43.5​	5120​	64 qam​	4​
3​	46200000​	43.5​	5120​	64 qam​	3​
4​	60300000​	43.5​	5120​	64 qam​	1​

Upstream bonded channels​

Channel	Channel Type	T1 Timeouts	T2 Timeouts	T3 Timeouts	T4 Timeouts
1​	ATDMA​	0​	0​	3​	0​
2​	ATDMA​	0​	0​	4​	0​
3​	ATDMA​	0​	0​	5​	0​
4​	ATDMA​	0​	0​	5​	0​

 

[kegnkiwi]

Ha Ha, I've no idea at the moment I'm in the office. I'll look later i bought 100m's of it years ago. I have no issues using it for satellite stuff.

What sort of coax did you use,?
Don't say RG6 , RG59, or the like, the actual brand and type,
eg , WF100 , CT100 , or whatever it may have been.

This is it

 

[pabloescaban]

Power levels are too low.
Should be between -6 and +10
Most of yours are -10
You need a visit from vm

 

[kegnkiwi]

Power levels are too low.
Should be between -6 and +10
Most of yours are -10
You need a visit from vm

Hi pablo before i get a call into virgin do you think that a simple splitter like this could be the issue. Also this install is project lighting so not sure if that makes any difference.

 

[pabloescaban]

Hi pablo before i get a call into virgin do you think that a simple splitter like this could be the issue

You should remove the splitter and cables from the router before you check power levels.
That black cable connection doesn't look in the best of health.
Check levels again after disconnection and see if they're any better?

 

[kegnkiwi]

I'll test it out shortly and report back, but that black cable is one I made and that's a bit of insulation tape that looks like a cut I'd put it around once before whilst trying to shield it.

 

[pabloescaban]

I'll test it out shortly and report back, but that black cable is one I made and that's a bit of insulation tape that looks like a cut I'd put it around once before whilst trying to shield it.

That may be causing the low readings.
If readings are normal when it's removed you'll have to remake the cables up.
If levels are still low without it then it's VM time

 

[kegnkiwi]

Ok it looks like its either the splitter or the cables as the power levels have increased. I have ordered a splitter off of ebay that is powered that should be here within a few days. I'm guessing that i should not call virgin now then. :)

Channel	Frequency (Hz)	Power (dBmV)	SNR (dB)	Modulation	Channel ID
1​	339000000​	-5.2​	37​	256 qam​	26​
2​	203000000​	-4.9​	37​	256 qam​	9​
3​	211000000​	-4.9​	37​	256 qam​	10​
4​	219000000​	-5​	38​	256 qam​	11​
5​	227000000​	-5​	37​	256 qam​	12​
6​	235000000​	-5.2​	37​	256 qam​	13​
7​	243000000​	-5.4​	37​	256 qam​	14​
8​	251000000​	-5.4​	37​	256 qam​	15​
9​	259000000​	-5.5​	37​	256 qam​	16​
10​	267000000​	-5.7​	37​	256 qam​	17​
11​	275000000​	-5.7​	38​	256 qam​	18​
12​	283000000​	-5.9​	37​	256 qam​	19​
13​	291000000​	-6​	37​	256 qam​	20​
14​	299000000​	-5.9​	37​	256 qam​	21​
15​	307000000​	-5.5​	37​	256 qam​	22​
16​	315000000​	-5.5​	37​	256 qam​	23​
17​	323000000​	-5.5​	37​	256 qam​	24​
18​	331000000​	-5.2​	38​	256 qam​	25​
19​	347000000​	-5​	37​	256 qam​	27​
20​	355000000​	-5​	38​	256 qam​	28​
21​	363000000​	-4.9​	38​	256 qam​	29​
22​	371000000​	-4.9​	38​	256 qam​	30​
23​	379000000​	-4.7​	38​	256 qam​	31​
24​	387000000​	-4.7​	38​	256 qam​	32​

Downstream bonded channels​

Channel	Locked Status	RxMER (dB)	Pre RS Errors	Post RS Errors
1​	Locked​	37.6​	3​	0​
2​	Locked​	37.6​	6​	0​
3​	Locked​	37.6​	5​	0​
4​	Locked​	38.6​	6​	0​
5​	Locked​	37.6​	6​	0​
6​	Locked​	37.3​	5​	0​
7​	Locked​	37.3​	0​	0​
8​	Locked​	37.6​	0​	0​
9​	Locked​	37.6​	3​	0​
10​	Locked​	37.6​	5​	0​
11​	Locked​	38.6​	5​	0​
12​	Locked​	37.6​	5​	0​
13​	Locked​	37.3​	10​	0​
14​	Locked​	37.3​	4​	0​
15​	Locked​	37.6​	4​	0​
16​	Locked​	37.6​	5​	0​
17​	Locked​	37.3​	5​	0​
18​	Locked​	38.6​	4​	0​
19​	Locked​	37.6​	5​	0​
20​	Locked​	38.6​	4​	0​
21​	Locked​	38.6​	6​	0​
22​	Locked​	38.6​	6​	0​
23​	Locked​	38.6​	4​	0​
24​	Locked​	38.6​	6​	0​

 

[kegnkiwi]

ok so something weird that i'm unsure about, the cable from the splitter to the v6 box has a short. I removed all the ends and remade them then checked continuity from inner to out cores and all is fine. If I then plug into the V6 box I get a short. So something is wierd. I am not sure this is pulling the signal down or the splitter. I keep working on it.

 

[pabloescaban]

ok so something weird that i'm unsure about, the cable from the splitter to the v6 box has a short. I removed all the ends and remade them then checked continuity from inner to out cores and all is fine. If I then plug into the V6 box I get a short. So something is wierd. I am not sure this is pulling the signal down or the splitter. I keep working on it.

Labgear splitter in use is a good make.
It's that black cable it's a duffer.
Connect the splitter and single cable but remove the black one and the levels will probably be fine

 

[kegnkiwi]

I'll try a few things tomorrow evening including making up a new cable from splitter to box. problem is I cannot get under the house anymore due to having wood floors put in. I can try pull a new cable through if that's the issue. I've had enough for this evening.

 

[Ferret.]

Downstream power levels should be as close to 0 as possible +3 acceptable but never a minus figure although Virgin may allow it, its not good.

Every splitter you have reduces the db after the hub even further.

 

[steptoe]

This is it

Looks like decent enough cable, .any chance that rodents could have chewed it,? or damp ingress.
Remember, you will be testing it with a DC meter (probably, unless you have a meter costing a couple of grand ) , the signal going down it will be an AC signal, so the problem with the cable might not show up.
This is only a guess BTW, but if removing that cable shows better readings then by default it's most likely the cable at fault.