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Kmmenard21
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3 Messages

Friday, May 15th, 2020 2:00 PM

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SB8200 speed capped at 250mbps

I just upgraded to Gigabit service and have an Arris SB8200.  I just had a tech here and he confirmed that the speed coming into the house is 1gbps, however when we checked the speed out of the modem it was being capped at 250mbps.  There were instances of 300mbps.

 

I just spoke with Arris customer support and the recommended cable signal levels for the modem are as follows:

 

Downstream power levels - -15 dBmV to 15 dBmV

Downstream SNR - 33 dB or greater

Upstream power levels - 45 dBmV to 51 dBmV

 

The first two meet the spec, but the upstream power levels are at 42 dBmV and that I should have the signal adjusted.  Is this correct path to get the speed I am signed up for?

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5 years ago

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EG

Expert

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111.4K Messages

5 years ago

No. That's nonsense. Arris is wrong ! It's something else causing the problem.

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Kmmenard21

Regular Visitor

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3 Messages

5 years ago

OK, so while I appreciate the previous response, it doesn't really give a path forward.  If it isn't the power specs Arris says they need, any ideas on what else I can check to try to resolve this issue?

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CCAndrew

Gold Problem Solver

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25.9K Messages

5 years ago

The first two meet the spec, but the upstream power levels are at 42 dBmV and that I should have the signal adjusted
_________
What exactly are your specs? If Arris, gave you the wrong range of levels to check, maybe you aren’t meeting them

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Kmmenard21

Regular Visitor

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3 Messages

5 years ago

They gave this link for the specs.

 

https://arris.secure.force.com/consumers/articles/General_FAQs/SB8200-Cable-Signal-Levels

 

Here is what I get from the router for test results

 

Startup Procedure
Procedure Status Comment
Acquire Downstream Channel 657000000 Hz Locked
Connectivity State OK Operational
Boot State OK Operational
Configuration File OK  
Security Enabled BPI+
DOCSIS Network Access Enabled Allowed  

 

 
Downstream Bonded Channels
Channel ID Lock Status Modulation Frequency Power SNR/MER Corrected Uncorrectables
33 Locked QAM256 657000000 Hz 4.1 dBmV 42.3 dB 0 0
1 Locked QAM256 465000000 Hz 3.1 dBmV 41.7 dB 0 0
2 Locked QAM256 471000000 Hz 3.2 dBmV 41.8 dB 0 0
3 Locked QAM256 477000000 Hz 3.5 dBmV 41.9 dB 0 0
5 Locked QAM256 489000000 Hz 3.0 dBmV 41.7 dB 0 0
6 Locked QAM256 495000000 Hz 3.1 dBmV 41.7 dB 0 0
7 Locked QAM256 501000000 Hz 2.9 dBmV 41.6 dB 0 0
8 Locked QAM256 507000000 Hz 2.9 dBmV 41.8 dB 0 0
9 Locked QAM256 513000000 Hz 3.0 dBmV 41.7 dB 0 0
10 Locked QAM256 519000000 Hz 3.1 dBmV 41.8 dB 0 0
11 Locked QAM256 525000000 Hz 3.0 dBmV 41.7 dB 0 0
12 Locked QAM256 531000000 Hz 3.0 dBmV 41.8 dB 0 0
13 Locked QAM256 537000000 Hz 3.2 dBmV 41.8 dB 0 0
14 Locked QAM256 543000000 Hz 2.8 dBmV 41.7 dB 0 0
15 Locked QAM256 555000000 Hz 3.0 dBmV 41.8 dB 0 0
16 Locked QAM256 561000000 Hz 2.8 dBmV 41.7 dB 0 0
17 Locked QAM256 567000000 Hz 2.8 dBmV 41.8 dB 0 0
18 Locked QAM256 573000000 Hz 2.8 dBmV 41.8 dB 0 0
19 Locked QAM256 579000000 Hz 2.9 dBmV 41.9 dB 0 0
20 Locked QAM256 585000000 Hz 3.4 dBmV 42.1 dB 0 0
21 Locked QAM256 591000000 Hz 3.3 dBmV 42.1 dB 0 0
22 Locked QAM256 597000000 Hz 3.5 dBmV 42.0 dB 0 0
23 Locked QAM256 603000000 Hz 3.4 dBmV 42.0 dB 0 0
24 Locked QAM256 609000000 Hz 3.4 dBmV 42.1 dB 0 0
25 Locked Other 690000000 Hz 3.9 dBmV 41.0 dB 582150631 244
26 Not Locked QAM256 0 Hz 0.0 dBmV 42.1 dB 0 0
27 Locked QAM256 621000000 Hz 3.5 dBmV 42.1 dB 0 0
28 Locked QAM256 615000000 Hz 3.4 dBmV 42.1 dB 0 0
29 Locked QAM256 627000000 Hz 3.5 dBmV 42.3 dB 0 0
30 Locked QAM256 633000000 Hz 3.7 dBmV 42.1 dB 0 0
31 Locked QAM256 639000000 Hz 3.6 dBmV 42.3 dB 0 0
32 Locked QAM256 645000000 Hz 4.0 dBmV 42.1 dB 0 0


 

 
Upstream Bonded Channels
Channel Channel ID Lock Status US Channel Type Frequency Width Power
1 8 Locked SC-QAM Upstream 16600000 Hz 6400000 Hz 42.0 dBmV
2 5 Locked SC-QAM Upstream 35800000 Hz 6400000 Hz 42.0 dBmV
3 6 Locked SC-QAM Upstream 29400000 Hz 6400000 Hz 42.0 dBmV
4 7 Locked SC-QAM Upstream 23000000 Hz 6400000 Hz 42.0 dBmV


 

 

Current System Time: Mon May 18 07:15:42 2020

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