Downstream Receive Power Level

[Agent47]

Had the chap from VM out this morning. He did various tests, checked the cabling, boxes including the one along the street. Everything is okay but he is concerned about my "Downstream Receive Power Level" its currently at -5.1dBmV. He says its roughly out by 4 points.

So he is going to pass it to the tech people to investigate.

Whilst he was doing a speedtest he was speaking a girl from CS and the speeds did shoot up but then dropped straight away. For a few seconds I thought it was sorted.

Anyway hats off to the VM tech for doing everything possible, hopefully it can be resolved eventually.

[Pedro1]

Mine is at 1dB at the moment, so yea he is about right. Have you extended any of your VM cables? Like joined them with electrical tape or something?
Doing such things reduces the signal on both the tv and broadband.

[Agent47]

Originally Posted by Pedro1

Mine is at 1dB at the moment, so yea he is about right. Have you extended any of your VM cables? Like joined them with electrical tape or something?
Doing such things reduces the signal on both the tv and broadband.

no mate my cables have been the same since day one.

[fatassmichael]

Agent47, it is accepted that the power level should be as close to zero "0" as possible, but your power level at -5.1 should be absolutely fine, heck i have seen modems running fine at -13 power, obviously its different conditions e.g different modem, part of country, qam modulation etc.

[Agent47]

Well I'll see how things go anyway.

[plasticjanner]

I'm lucky where I live (+3dB). I have my modem upstairs but the cable plumbed in downstairs. It splits behind the TV and links into the TV-coax which goes up to the (Freeview) Aerial in the loft. The freq's don't interfere because they're worlds apart.
The co-ax then carries on to my study where it is split again with one going to my DVB card and the other to the Modem.
Obviously taking the scenic route causes a power-loss with all that extra-resistance but I still get 4Mbit/s BB and Freeview on my PC from one co-ax.

[Agent47]

I used to have analogue tv from ntl, the cable still runs outside into the grey box, but its keep cut inside the house, could that cause interference.

[plasticjanner]

Any unshielded cables will cause loss. If this cable is defunct and goes nowhere then pull it out since it will cause you slight signal loss.
Have you compared signal levels with neighbours on the same street?

[Agent47]

Originally Posted by plasticjanner

Any unshielded cables will cause loss. If this cable is defunct and goes nowhere then pull it out since it will cause you slight signal loss.
Have you compared signal levels with neighbours on the same street?

Ive not compared signals levels with other neighbours.

[Agent47]

My power levels are now Downstream Receive Power Level : 0.3 dBmV

I did unscrew the old analogue cable from the wee gray plastic box at my door, as this was cut from inside the house due to it not being needed.

SO wonder if doing that caused the levels to drop or maybe VM did something as the tech was gonna pass it onto other tech guys.

Before from this site I was getting only roughly 900k per sec

http://ftp.ticklers.org/debian-cd/4.0_r0/amd64/iso-dvd/

now I get 2009k per second.

Before


Cable Modem Downstream
Downstream Lock : Locked
Downstream Channel Id : 2
Downstream Frequency : 402750000 Hz
Downstream Modulation : QAM256
Downstream Symbol Rate : 5360.537 Ksym/sec
Downstream Interleave Depth : taps32Increment4
Downstream Receive Power Level : -5.1 dBmV
Downstream SNR : 35.8 dB

Now


Cable Modem Downstream

Downstream Lock : Locked
Downstream Channel Id : 2
Downstream Frequency : 402750000 Hz
Downstream Modulation : QAM256
Downstream Symbol Rate : 5360.537 Ksym/sec
Downstream Interleave Depth : taps32Increment4
Downstream Receive Power Level : 0.3 dBmV
Downstream SNR : 39.9 dB

[Pyr0]

is this out enough that i won't just be fobbed off if i called virgin?

Downstream Lock : Locked
Downstream Frequency : 586750000 Hz
Downstream Modulation : QAM64
Downstream Interleave Depth : taps12increment17
Downstream Receive Power Level : -14.3 dBmV
Downstream SNR : 28.4 dB

Upstream Channel ID : 2
Upstream Transmit Power Level : 53.0 dBmV
Upstream Symbol Rate : 2560 Ksym/sec
Upstream Frequency : 37500000 Hz
Upstream Mini-Slot Size : 2

[blade85]

mine is currently at

Downstream Value
Frequency 330750000 Hz Locked
Signal to Noise Ratio 37 dB
Power Level 8 dBmV

Upstream Value
Channel ID 2
Frequency 22200000 Hz Ranged
Power Level 41 dBmV

should i be worried???

[fatassmichael]

Pyr0, blade, are any of you having any problems with your connections?

[Pyr0]

like slow browsing, varying speeds while downloading, pages taking forever to load while downloading, and slightly lower upload speed than when i was on 10M...

yes

[fatassmichael]

have you tried tcp optimizer, and the optimizations from VM?