New Poster
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3 Messages
Low Download Speeds
I upgraded a while ago to the gigabit internet plan but haven't been able to get anything close to the speeds I expected. My upload speed is great but my download speed is only about 500MBPS. I talked to ARRIS about it and they said my upload power was too low (39) but comcast doesn't seem to think that's an issue. Not sure what the next steps should be - i don't have any splitters on the line headed to the modem. I do get some distoration on some channels on my cable box (mostly like nat geo). Any thoughts on what I should do or who to talk to to get it sorted out?
EG
Expert
•
111.8K Messages
4 years ago
FWIW, Arris is wrong ! They have been passing the buck and have been conning people with that statement lately !! They are probably trying to cover up for their liabilities about the lawsuits against them because of their use of the horrible Puma 6 chipsets... Only the Comcast plant / engineering specs matter;
Specification Min Max
Downstream Power Level
Cable Modems -10dBmV +10dBmV
Gateways and EMTAs -7dBmV +7dBmV
Downstream Signal to Noise Ratio 35dB -
Upstream Power Level +35dBmV +50dBmV
Upstream Signal to Noise Ratio 31dB -
Upstream Receive Power -2dBmV
+2dBmV
Something else is going on. Would you please post all of the modem stat figures. Please post the *Downstream Power Level*, the *Upstream Power Level*, and the *SNR* (Signal to Noise Ratio) numbers.
What is the exact model number of the Arris modem ?
Is this with a WiFi connection ?
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fattiebumps
New Poster
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3 Messages
4 years ago
I'm running the speed test directly from the router which is connected by ethernet to the modem. I did directly connect my laptop to the modem and got the same speeds too.
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fattiebumps
New Poster
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3 Messages
4 years ago
Downstream Bonded Channels
Channel ID
Lock Status
Modulation
Frequency
Power
SNR/MER
Corrected
Uncorrectables
25
Locked
QAM256
603000000 Hz
4.2 dBmV
42.5 dB
212
334
9
Locked
QAM256
507000000 Hz
3.8 dBmV
42.6 dB
588
716
10
Locked
QAM256
513000000 Hz
3.6 dBmV
42.6 dB
543
607
11
Locked
QAM256
519000000 Hz
3.5 dBmV
42.7 dB
562
737
12
Locked
QAM256
525000000 Hz
3.9 dBmV
42.8 dB
523
476
13
Locked
QAM256
531000000 Hz
3.9 dBmV
42.8 dB
561
597
14
Locked
QAM256
537000000 Hz
3.9 dBmV
42.8 dB
561
391
15
Locked
QAM256
543000000 Hz
3.7 dBmV
42.8 dB
507
592
16
Locked
QAM256
549000000 Hz
3.5 dBmV
42.7 dB
445
395
17
Locked
QAM256
555000000 Hz
3.4 dBmV
42.6 dB
466
437
18
Locked
QAM256
561000000 Hz
3.9 dBmV
42.8 dB
329
406
19
Locked
QAM256
567000000 Hz
3.7 dBmV
42.9 dB
365
372
20
Locked
QAM256
573000000 Hz
3.4 dBmV
42.5 dB
358
412
21
Locked
QAM256
579000000 Hz
3.5 dBmV
42.7 dB
282
338
22
Locked
QAM256
585000000 Hz
3.3 dBmV
42.6 dB
301
404
23
Locked
QAM256
591000000 Hz
3.8 dBmV
42.7 dB
290
309
24
Locked
QAM256
597000000 Hz
3.9 dBmV
42.4 dB
291
384
26
Locked
QAM256
609000000 Hz
3.4 dBmV
41.9 dB
224
303
27
Locked
QAM256
615000000 Hz
3.1 dBmV
41.7 dB
152
280
28
Locked
QAM256
621000000 Hz
3.2 dBmV
41.7 dB
209
247
29
Locked
QAM256
627000000 Hz
3.6 dBmV
42.0 dB
165
264
30
Locked
QAM256
633000000 Hz
3.8 dBmV
42.0 dB
149
239
31
Locked
QAM256
639000000 Hz
3.8 dBmV
42.0 dB
156
257
32
Locked
QAM256
645000000 Hz
3.5 dBmV
41.9 dB
86
203
33
Locked
QAM256
651000000 Hz
3.4 dBmV
41.9 dB
163
248
34
Locked
QAM256
657000000 Hz
3.7 dBmV
42.0 dB
90
194
35
Locked
QAM256
663000000 Hz
4.2 dBmV
42.3 dB
146
252
36
Locked
QAM256
669000000 Hz
4.5 dBmV
42.3 dB
100
245
37
Locked
QAM256
675000000 Hz
4.5 dBmV
41.8 dB
144
234
38
Locked
QAM256
681000000 Hz
4.6 dBmV
42.5 dB
86
228
39
Locked
QAM256
687000000 Hz
4.9 dBmV
42.6 dB
100
203
40
Locked
QAM256
693000000 Hz
5.5 dBmV
42.8 dB
88
220
159
Locked
Other
702000000 Hz
6.7 dBmV
41.8 dB
91
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Upstream Bonded Channels
Channel
Channel ID
Lock Status
US Channel Type
Frequency
Width
Power
1
1
Locked
SC-QAM Upstream
36500000 Hz
6400000 Hz
38.0 dBmV
2
2
Locked
SC-QAM Upstream
30100000 Hz
6400000 Hz
38.0 dBmV
3
3
Locked
SC-QAM Upstream
23700000 Hz
6400000 Hz
37.0 dBmV
4
4
Locked
SC-QAM Upstream
17300000 Hz
6400000 Hz
38.0 dBmV
It's an ARRIS Surfboard SB8200
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EG
Expert
•
111.8K Messages
4 years ago
The values are very good ! Try calling 1-800-comcast and ask a rep to completely remove the modem from your account and to "re-provision" it from scratch. Also ask them to confirm that the provisioning and account data in their database is correct and complete and that the correct configuration / bootfile for your subscribed to speed tier is being pushed to the modem. Good luck !
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