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UPC Cisco EPC3925 DownStream channels power level

  • 31-03-2015 9:09pm
    #1
    kamin99
    Registered Users Posts: 158 ✭✭


    Can Anyone tell me if these reading are ok for UPC Cisco EPC3925, I'm on the 240 Mb and used to get very close to that figure wireless but in the last fee days I'm only getting 80-90 . I tried restarting it and also restarting my Asus AC router but nothing improved
    Many thanks for your help

    Downstream Channels

    Power Level: Signal to Noise Ratio:
    Channel 1: -1.7 dBmV 38.1 dB
    Channel 2: 0.6 dBmV 39.0 dB
    Channel 3: -1.0 dBmV 38.4 dB
    Channel 4: 0.5 dBmV 37.9 dB
    Channel 5: 0.6 dBmV 38.8 dB
    Channel 6: 0.6 dBmV 39.0 dB
    Channel 7: -0.1 dBmV 38.6 dB
    Channel 8: -0.7 dBmV 37.9 dB


    Upstream Channels
    Power Level:
    Channel 1: 50.2 dBmV
    Channel 2: 49.9 dBmV
    Channel 3: 50.4 dBmV
    Channel 4: 50.7 dBmV


Comments

  • #2
    Calibos
    Registered Users, Registered Users 2 Posts: 7,810 ✭✭✭Calibos


    Mine. Bridged EPC3925 to Asus RT N66U 245/25mbit wired 24/7/365

    Power Level: Signal to Noise Ratio:
    Channel 1: 10.6 dBmV 41.4 dB
    Channel 2: 11.0 dBmV 41.9 dB
    Channel 3: 11.3 dBmV 41.4 dB
    Channel 4: 10.1 dBmV 40.4 dB
    Channel 5: 10.4 dBmV 40.4 dB
    Channel 6: 10.2 dBmV 40.5 dB
    Channel 7: 9.8 dBmV 40.4 dB
    Channel 8: 9.1 dBmV 39.4 dB


    Upstream Channels
    Power Level:
    Channel 1: 47.5 dBmV
    Channel 2: 45.7 dBmV
    Channel 3: 45.4 dBmV
    Channel 4: 47.9 dBmV


  • #3
    ED E
    Registered Users, Registered Users 2 Posts: 36,169 ✭✭✭✭ED E


    120 / 12, rock solid on new enough cabling and probably way under performing.
     	Power Level:	Signal to Noise Ratio:
Channel 1:	1.8 dBmV	41.3 dB
Channel 2:	2.0 dBmV	41.4 dB
Channel 3:	2.4 dBmV	41.9 dB
Channel 4:	2.3 dBmV	42.0 dB
Channel 5:	2.9 dBmV	41.9 dB
Channel 6:	2.9 dBmV	41.9 dB
Channel 7:	3.2 dBmV	42.0 dB
Channel 8:	3.1 dBmV	41.9 dB

 		
Upstream Channels	 	 
 	Power Level:
Channel 1:	50.3 dBmV
Channel 2:	49.5 dBmV
Channel 3:	49.7 dBmV
Channel 4:	49.5 dBmV


  • #4
    kamin99
    Registered Users Posts: 158 ✭✭kamin99


    Many thanks Calibos , very Helpful indeed
    I knew there was something wrong with mine , a UPC van stoped outside my house to set up my neighbour's new connection and since then my speed is down , they must have done something BAD to my line accidentally
    I better give them a call and see what they say


  • #5
    kamin99
    Registered Users Posts: 158 ✭✭kamin99


    ED E wrote: »
    120 / 12, rock solid on new enough cabling and probably way under performing.
     	Power Level:	Signal to Noise Ratio:
Channel 1:	1.8 dBmV	41.3 dB
Channel 2:	2.0 dBmV	41.4 dB
Channel 3:	2.4 dBmV	41.9 dB
Channel 4:	2.3 dBmV	42.0 dB
Channel 5:	2.9 dBmV	41.9 dB
Channel 6:	2.9 dBmV	41.9 dB
Channel 7:	3.2 dBmV	42.0 dB
Channel 8:	3.1 dBmV	41.9 dB

 		
Upstream Channels	 	 
 	Power Level:
Channel 1:	50.3 dBmV
Channel 2:	49.5 dBmV
Channel 3:	49.7 dBmV
Channel 4:	49.5 dBmV

    Interesting now , your figures are different from those for the 240/24 ! is that the case?


  • #6
    ED E
    Registered Users, Registered Users 2 Posts: 36,169 ✭✭✭✭ED E


    kamin99 wrote: »
    Interesting now , your figures are different from those for the 240/24 ! is that the case?

    Mine is less utilized, and distances from the CMTS might vary a bit (Im still not 100% sure where mine is).


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  • #7
    kamin99
    Registered Users Posts: 158 ✭✭kamin99


    ED E wrote: »
    Mine is less utilized, and distances from the CMTS might vary a bit (Im still not 100% sure where mine is).

    reasonable assumption ,but it is more than likely that mine is not right at all :mad:


  • #8
    ED E
    Registered Users, Registered Users 2 Posts: 36,169 ✭✭✭✭ED E


    http://www.dslreports.com/faq/3412

    Have a read. Different doesnt necessarily mean bad.


  • #9
    kamin99
    Registered Users Posts: 158 ✭✭kamin99


    ED E wrote: »
    http://www.dslreports.com/faq/3412

    Have a read. Different doesnt necessarily mean bad.

    ok this is even more unsettling "You generally want between -12db and +12db." as my figures are within these parameter!:eek:


  • #10
    ED E
    Registered Users, Registered Users 2 Posts: 36,169 ✭✭✭✭ED E


    80-90 sounds like one of your links has dropped to Fast Ethernet vs Gig speeds.


  • #11
    kamin99
    Registered Users Posts: 158 ✭✭kamin99


    ok now my upstream power level are zero
    dose this make any sense
    Downstream Channels
    Power Level: Signal to Noise Ratio:
    Channel 1: 0.4 dBmV 40.6 dB
    Channel 2: 0.8 dBmV 40.9 dB
    Channel 3: 0.5 dBmV 40.7 dB
    Channel 4: 0.9 dBmV 39.4 dB
    Channel 5: 0.9 dBmV 38.8 dB
    Channel 6: 0.7 dBmV 37.9 dB
    Channel 7: 0.5 dBmV 39.0 dB
    Channel 8: -1.3 dBmV 38.3 dB


    Upstream Channels
    Power Level:
    Channel 1: 54.5 dBmV
    Channel 2: 0.0 dBmV
    Channel 3: 0.0 dBmV
    Channel 4: 0.0 dBmV


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  • #12
    Dave..M
    Registered Users, Registered Users 2 Posts: 693 ✭✭✭Dave..M


    kamin99 wrote: »
    ok now my upstream power level are zero
    dose this make any sense
    Downstream Channels
    Power Level: Signal to Noise Ratio:
    Channel 1: 0.4 dBmV 40.6 dB
    Channel 2: 0.8 dBmV 40.9 dB
    Channel 3: 0.5 dBmV 40.7 dB
    Channel 4: 0.9 dBmV 39.4 dB
    Channel 5: 0.9 dBmV 38.8 dB
    Channel 6: 0.7 dBmV 37.9 dB
    Channel 7: 0.5 dBmV 39.0 dB
    Channel 8: -1.3 dBmV 38.3 dB


    Upstream Channels
    Power Level:
    Channel 1: 54.5 dBmV
    Channel 2: 0.0 dBmV
    Channel 3: 0.0 dBmV
    Channel 4: 0.0 dBmV

    Your ds levels are bang on, looking at your original post I'd have suggested your us is borderline and prone to dropping which it is doing. Upstream is far more susceptible to noise due to the nature of docsis so I suggest you have a definite line fault, could be problems in your neighbors wiring if they had a new install that is feeding back. Best call UPC

    Edit
    It could also be bad wiring on your side of the fence, if it's just recent it could be some old cable from your tap into your house has frayed in the wind (been a windy few months, yarrr!) you could eyeball that yourself but in any event a call to UPC is best.


  • #13
    Alun
    Registered Users, Registered Users 2 Posts: 21,486 ✭✭✭✭Alun


    These are mine ...
    Downstream Channels 	  	 		
		
  	Power Level: 	Signal to Noise Ratio:
Channel 1: 	16.5 dBmV 	40.3 dB
Channel 2: 	16.6 dBmV 	40.8 dB
Channel 3: 	16.4 dBmV 	40.7 dB
Channel 4: 	16.4 dBmV 	39.8 dB
Channel 5: 	16.1 dBmV 	40.3 dB
Channel 6: 	16.2 dBmV 	40.3 dB
Channel 7: 	15.4 dBmV 	40.2 dB
Channel 8: 	15.1 dBmV 	39.3 dB

  		
Upstream Channels 	  	 		
		
  	Power Level:
Channel 1: 	35.7 dBmV
Channel 2: 	35.7 dBmV
Channel 3: 	37.4 dBmV
Channel 4: 	38.2 dBmV


  • #14
    Dave..M
    Registered Users, Registered Users 2 Posts: 693 ✭✭✭Dave..M


    Alun wrote: »
    These are mine ...

    They're some pretty hairy ds power levels, have you a few splitters around?


  • #15
    Xpro
    Registered Users, Registered Users 2 Posts: 900 ✭✭✭Xpro


    Power levels close to zero are good ones thats when they are leveled out.


  • #16
    Alun
    Registered Users, Registered Users 2 Posts: 21,486 ✭✭✭✭Alun


    Dave..M wrote: »
    They're some pretty hairy ds power levels, have you a few splitters around?
    Not sure what you mean there? I've no splitters at all.


  • #17
    kamin99
    Registered Users Posts: 158 ✭✭kamin99


    Dave..M wrote: »
    Your ds levels are bang on, looking at your original post I'd have suggested your us is borderline and prone to dropping which it is doing. Upstream is far more susceptible to noise due to the nature of docsis so I suggest you have a definite line fault, could be problems in your neighbors wiring if they had a new install that is feeding back. Best call UPC

    Edit
    It could also be bad wiring on your side of the fence, if it's just recent it could be some old cable from your tap into your house has frayed in the wind (been a windy few months, yarrr!) you could eyeball that yourself but in any event a call to UPC is best.

    I'm on it to UPC :mad:


  • #18
    kamin99
    Registered Users Posts: 158 ✭✭kamin99


    Xpro wrote: »
    Power levels close to zero are good ones thats when they are leveled out.

    Wow so I should be good , but my speed is so low !
    I called UPC and after 30 min of the usual unplug this and disconnect that I got Technician coming to check things and I was told if the fault is not on UPC side of things I will have to fork 40 Euro fees!:mad:


  • #19
    degsie
    Registered Users, Registered Users 2 Posts: 8,749 ✭✭✭degsie


    Have you power cycled the modem? Have you verified your NIC is connecting at 1Gb/s?


  • #20
    kamin99
    Registered Users Posts: 158 ✭✭kamin99


    degsie wrote: »
    Have you power cycled the modem? Have you verified your NIC is connecting at 1Gb/s?

    yeh done that and got UPC to reset the modem from their side, still no different they are sending an enginerr to check things :(


  • #21
    Dave..M
    Registered Users, Registered Users 2 Posts: 693 ✭✭✭Dave..M


    kamin99 wrote: »
    Wow so I should be good , but my speed is so low !
    I called UPC and after 30 min of the usual unplug this and disconnect that I got Technician coming to check things and I was told if the fault is not on UPC side of things I will have to fork 40 Euro fees!:mad:

    Assuming you've done the basic power cycles noted earlier and you've not done something funky with the internal cable, with 3 upstream channels not sync'ing it's on UPC's side, if there is any pushback on the charge just email the reps on the talk to forum attaching those stats.


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  • #22
    Dave..M
    Registered Users, Registered Users 2 Posts: 693 ✭✭✭Dave..M


    Alun wrote: »
    Not sure what you mean there? I've no splitters at all.

    The spec for docsis 3 is +/- 15 dBmV with 0 being optimal so 16 would be on the high side, are there any splitters or joins outside? I had an old one on the garage roof from way back when that was knackered (UPC don't use self amalgamating tape to seal external joins & splitters so prone to the elements) once I took that out my power levels dropped a lot and hover nicely around 0 (in cold weather they go up a bit due to increased resistance but never above 3). Or do you have one of their small amp boxes on yours or your neighbors house?that could be causing the high levels. As with all of these things though if you have no performance issues then it's not a problem but if you do that's the first thing I'd look at.


  • #23
    Alun
    Registered Users, Registered Users 2 Posts: 21,486 ✭✭✭✭Alun


    Our house is in a relatively modern estate where all the utilities including UPC's run in a duct outside along the pavement rather than being strung along the fascias. The UPC feed then comes into a small access box on the side of the house along with the eircom feed. When we moved in first, the previous occupants had 4 TV points installed when the house was built with a powered 4 way splitter, presumably amplified, in the same access box. We initially only used one of those in the living room for UPC TV for a number of years before we got rid of it. When I got UPC broadband a couple of years ago, I simply removed the splitter altogether and connected the incoming feed to the cable leading to the TV point in my office with an inline barrel connector, that's it. The TV points are the old pre-NTL/UPC Cablecom ones if that's relevant.

    Anyway, I don't have any problems with my connection as it happens, so it doesn't particularly worry me, but at the same time I'm puzzled as to why the levels are so high.


  • #24
    Dave..M
    Registered Users, Registered Users 2 Posts: 693 ✭✭✭Dave..M


    Alun wrote: »
    Our house is in a relatively modern estate where all the utilities including UPC's run in a duct outside along the pavement rather than being strung along the fascias. The UPC feed then comes into a small access box on the side of the house along with the eircom feed. When we moved in first, the previous occupants had 4 TV points installed when the house was built with a powered 4 way splitter, presumably amplified, in the same access box. We initially only used one of those in the living room for UPC TV for a number of years before we got rid of it. When I got UPC broadband a couple of years ago, I simply removed the splitter altogether and connected the incoming feed to the cable leading to the TV point in my office with an inline barrel connector, that's it. The TV points are the old pre-NTL/UPC Cablecom ones if that's relevant.

    Anyway, I don't have any problems with my connection as it happens, so it doesn't particularly worry me, but at the same time I'm puzzled as to why the levels are so high.

    The old small square white Cablelink points? I still have one of those in one of the rooms (God be with the days!!) if the internal cable is from that era too the. it's probably a decent copper shielding vs today's copper light cable. The old Cablelink points though have screw in connectors internally similar to the existing UPC ones to split the signal but if it's just a plain TV wall point with the coax stripped and held by a two screw clamp that could be the cause. If you get bored you could screw it off and have a look. Then again it could just one of life's little mysteries that sucks up your time looking for an elusive answer!


  • #25
    Alun
    Registered Users, Registered Users 2 Posts: 21,486 ✭✭✭✭Alun


    That's the one, with two outputs, one for TV and the other for Radio. If you take the plastic cover off, there's a 2-way splitter inside and the incoming cable has an F-connector on it that screws onto the input of the splitter, so it all looks good.


  • #26
    Dave..M
    Registered Users, Registered Users 2 Posts: 693 ✭✭✭Dave..M


    Alun wrote: »
    That's the one, with two outputs, one for TV and the other for Radio. If you take the plastic cover off, there's a 2-way splitter inside and the incoming cable has an F-connector on it that screws onto the input of the splitter, so it all looks good.

    Well if it ain't broke.....


  • #27
    kamin99
    Registered Users Posts: 158 ✭✭kamin99


    So the engineer came today found the outside cable worn out and changed it with a thicker gauge one and now I'm getting 240/24 Wireless again:D , he said Downstream channels power level should be between +6 and - 14 but better far away from both end of the scale . and also not to worry about the upstream channels much
    mine now are

    Channel 1: 0.9 dBmV 40.4 dB
    Channel 2: 1.8 dBmV 40.9 dB
    Channel 3: 1.7 dBmV 40.8 dB
    Channel 4: 2.1 dBmV 39.6 dB
    Channel 5: 1.6 dBmV 38.7 dB
    Channel 6: 1.3 dBmV 38.9 dB
    Channel 7: 1.0 dBmV 38.7 dB
    Channel 8: 0.8 dBmV 37.6 dB


    Upstream Channels
    Power Level:
    Channel 1: 47.0 dBmV
    Channel 2: 48.2 dBmV
    Channel 3: 46.4 dBmV
    Channel 4: 45.9 dBmV


  • #28
    Calibos
    Registered Users, Registered Users 2 Posts: 7,810 ✭✭✭Calibos


    Not going to touch mine like Alun as I'm getting 245/25mbit 24/7/365 regardless, but going on my figures ironically its actually me that needs an attenuator on my tap feeding my modem and not the OP :D


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