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Signal Levels look really high
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Old 16-12-2009, 18:55   #1
AHN-David
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Signal Levels look really high
Hey guys I just looked at my signal levels and compared them to the levels suggested in the stickey. Do these look really high to anyone?

Cable Modem Downstream
Downstream Lock : Locked
Downstream Channel Id : 4
Downstream Frequency : 402750000 Hz
Downstream Modulation : QAM256
Downstream Symbol Rate : 5360.537 Ksym/sec
Downstream Interleave Depth : taps32Increment4
Downstream Receive Power Level : 0.6 dBmV
Downstream SNR : 37.7 dB

Cable Modem Upstream
Upstream Lock : Locked
Upstream Channel ID : 5
Upstream Frequency : 18384000 Hz
Upstream Modulation : QPSK
Upstream Symbol Rate : 2560 Ksym/sec
Upstream transmit Power Level : 59.0 dBmV
Upstream Mini-Slot Size : 2


Thanks
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Old 16-12-2009, 18:56   #2
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Re: Signal Levels look really high
Upstream to high, everything else fine, give support a call.
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Old 16-12-2009, 18:58   #3
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Re: Signal Levels look really high
Does it make a difference that much? The engineer fixed them 2 days ago.

I was reading up and it says they can change randomly. Is that correct?
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Old 16-12-2009, 19:00   #4
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Re: Signal Levels look really high
@ AHN-David

Have you tried testing your upload speed just now? I would be interested to know what your current upload speed is, especially as I see you have QPSK.
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Old 16-12-2009, 19:00   #5
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Re: Signal Levels look really high
Quote:
Originally Posted by AHN-David View Post
Does it make a difference that much? The engineer fixed them 2 days ago.

I was reading up and it says they can change randomly. Is that correct?
That is to high and should be ideally in the mid 40 range, keep an eye on it and if your connection degrades or the power level stays high give support a call.
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Old 16-12-2009, 19:03   #6
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Re: Signal Levels look really high


Is my latest speed test.

Normal service looks to be resumed in Glasgow for download speed anyway and my upload is always around 30/40's
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Old 16-12-2009, 19:05   #7
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Re: Signal Levels look really high
@ AHN-David

Seems your upload speed has been currently hit as mine is right now.
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Old 16-12-2009, 19:06   #8
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Re: Signal Levels look really high
If you are happy then ignore it for now.

Do not become a statistics monkey posting every slight variation, just enjoy your broadband and let it do what it does best, entertain you.
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Old 16-12-2009, 19:09   #9
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Re: Signal Levels look really high
My upload has mostly been the same. Never peaks over 0.50kbps

Also what is QPSK?

---------- Post added at 19:09 ---------- Previous post was at 19:08 ----------

Quote:
Originally Posted by Moldova View Post
If you are happy then ignore it for now.

Do not become a statistics monkey posting every slight variation, just enjoy your broadband and let it do what it does best, entertain you.

I attend to do it now I am so happy I am back to my normal 10mb speed at peak times.

I have decided to stick with virgin even though I had already arranged a cancel date.
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Old 16-12-2009, 19:11   #10
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Re: Signal Levels look really high
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Old 16-12-2009, 19:14   #11
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Re: Signal Levels look really high
Quote:
Originally Posted by Moldova View Post
Upstream to high, everything else fine, give support a call.
we all know that 59dBmv is high on the upstream but network guys rate it upto 61dBmv as fine.

When i had 2 Senior network engineers here during the BSR calamity thats still ongoin in swansea they had my records that showed that my upstream was peaking around 59dBmv and told me it wouldnt cause modem reboots unless it was 61dBmv or over.
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Old 16-12-2009, 19:19   #12
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Re: Signal Levels look really high
Quote:
Originally Posted by Welshchris View Post
we all know that 59dBmv is high on the upstream but network guys rate it upto 61dBmv as fine.

When i had 2 Senior network engineers here during the BSR calamity thats still ongoin in swansea they had my records that showed that my upstream was peaking around 59dBmv and told me it wouldnt cause modem reboots unless it was 61dBmv or over.
this may be so,but all you would need to disrupt your connectivity would be the signal levels off the amplifier in the cabinet fluctuating 2-3db and you would suffer.
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Old 16-12-2009, 19:40   #13
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Re: Signal Levels look really high
Quote:
Originally Posted by Welshchris View Post
we all know that 59dBmv is high on the upstream but network guys rate it upto 61dBmv as fine.

When i had 2 Senior network engineers here during the BSR calamity thats still ongoin in swansea they had my records that showed that my upstream was peaking around 59dBmv and told me it wouldnt cause modem reboots unless it was 61dBmv or over.
Well seeming as no modem can actually show a reading above 61 the is no way of actually know how much higher it has gone, and we know that the modem is actually more stable in the mid 40's region.

What would you rather have a pair of bluffers trying to get away with doing nothing or someone actually checking out the issue, I think the answer is a no brainer here.
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Old 16-12-2009, 22:18   #14
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Re: Signal Levels look really high
Since being put back on the UBR from the BSR my upstream went from being between 51 - 54dBmv to around 47dBmv.
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Old 16-12-2009, 22:25   #15
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Re: Signal Levels look really high
Quote:
Originally Posted by Welshchris View Post
Since being put back on the UBR from the BSR my upstream went from being between 51 - 54dBmv to around 47dBmv.
As it should be.
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