is my power settings ok?
 

got sent out a new superhub2 and activated it
can you tell me if power settings are ok?

Re: is my power settings ok?
 

They look too low to me, but I'm sure someone more knowledgeable will confirm with facts and figures :)
Cheers

Re: is my power settings ok?
 

Not an expert but the downstream seems a little low.

What i am interested in though is you have 4 upstreams!!!

Re: is my power settings ok?
 

Quite a few people have now, it is the way forward and I am sure we'll end up on 4 by Easter.

Snoopz is right about your power levels, have you got an attenuator on the back of your shub? If not you need to make a call to tech support and get them to send someone out and move your tap point in the street cabinet. It will also increase your upstream power as well. Surprisingly the ming mongs in India have got quite good at picking this stuff up so you shouldn't have a problem.

Re: is my power settings ok?
 

You have a low downstream and a lowish upstream, you either have a forward path attenuator or a really long line

Re: is my power settings ok?
 

Moving to a less attenuated tap port will increase downstream and decrease upstream...

Re: is my power settings ok?
 

Which may be a problem as its 38 as it is

Re: is my power settings ok?
 

I thought 33 was the lower limit on upstream before errors occurred?

Re: is my power settings ok?
 

i removed the attenuator which is 20db forward path and here is results
aslso is that the correct modulation i am on as previous superhum1 was different

Re: is my power settings ok?
 

20db jeez, you need a 10db really

Re: is my power settings ok?
 

I couldn't find a 10 but this 15 will have the same affect as the 10. -2 on the downstream is absolutely fine and mine is like that all the time

http://www.ebay.co.uk/itm/Forward-Pa...item3ab13bd324

(buy it)

Re: is my power settings ok?
 

Don't buy it. Don't spend your own money, not even a penny. Call Virgin and get a tech out to sort it properly, on Virgin's dime.

Re: is my power settings ok?
 

Hmmm, another instance where me and Kush are going to hace to agree to disagree. By all means ring tech support and have fun trying to explain it to India. If they turn around and say it is going to be the end of the week or next week before someone comes out then i would rather splash out a few £££ and get it fixed sooner. My connection means too much to me for it to be pants for a week.

Re: is my power settings ok?
 

http://www.helpguide.org/articles/ad...-addiction.htm :)

I'm going to join Mr Kushan. No-one should be touching the coax behind the Superhub. That is not your property, it's Virgin's much as the Superhub is. An attenuator may cover up the issue however a different tap port should be used if at all possible and the attenuator removed. This will improve upstream SNR for that modem.

Re: is my power settings ok?
 

Great, so i was right first time round :p

Re: is my power settings ok?
 

Indeed, General Maximus Addicted, you were. Changing the tap port will raise the modem's transmit power and place its signal higher above the noise floor. Removing the attenuator will compensate for the drop in received power.

Bad install. Adding an attenuator or anything else onto the back of CPE should be the absolute last option.

Re: is my power settings ok?
 

Going forward those forward path attenuators will be phased out, as its attenuation range is 65-860mhz. When vm go to a 85mhz+ return path and 1ghz+ forward they won't be any good

Re: is my power settings ok?
 

In an ideal world where there are more tap points than customers, in reality we dot have the luxury of moving a point in the cab without moving someone else (creating a fault for another customer) so I will always choose the attenuator and leave the signal +5ish to compensate if someone bumps my customer up or down

Re: is my power settings ok?
 

Sadly if everyone always chooses the attenuators you end up with a bunch of customers on the wrong tap with attenuators to compensate.

That's probably about all you can do now. Putting drops onto the right taps for their distance would break their service as people put them on the wrong ones and used attenuators.

Going to be epic to see what happens when the networks start running on 5-85MHz return and 105-1003MHz forward. Will generate a bunch of service calls from bodged installs.

Re: is my power settings ok?
 

A service techncian can only fix one customer, there needs some investment to disconnect all dead drops but sadly it never happens.

Will people with FPA not just have one upstream at say 48db but the other 3 will be 38db?

what about customers with simulators and equilisers? Are they botched installs?

Re: is my power settings ok?
 

Interesting ......
For a long time I had around 0 to +1 db DS levels, but "one day" they all dropped to around -4.5 to -5db. I suspect my connection was moved in the Cab?
However, I've since noticed I have a 8db FPA fitted in front of the TV/SH splitter and I've often thought of removing this.
But, I would be worried it would affect the TiVo signal levels as well as the SH.
Maybe I'll just leave well alone ....... :)

Re: is my power settings ok?
 

If it works leave it but there would be no issue removing it

Re: is my power settings ok?
 

If the slope is perfect, sure. Either way the customer is at best within 2dB of dynamic range window violation which is not good.

Given upstreams on the D3 platform start at a centre of 25.8MHz it doesn't seem unlikely there'll be a variance of >2dB between that channel and one in the 70s without adding an extra 10dB.

That adding kit onto the end of the customer's CPE should be a last resort aren't my words, they're VM's.

Re: is my power settings ok?
 

Brilliant !. I'm wondering if it's still relevant as far as the discussed power levels,as it seemed to be 2014.
Still, a great insight into the workings of cable. :)

Re: is my power settings ok?
 

Should be fun when the change happens :)

Re: is my power settings ok?
 

There is no hard lower limit.