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vegasmar6

Contributor II

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79 Messages

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Signal level question
Downstream Bonded Channels
Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables UnCorrectables
1 Locked QAM 256 25 927000000 Hz 0.2 dBmV 37.0 dB 179 2426
2 Locked QAM 256 26 933000000 Hz 0.1 dBmV 37.0 dB 258 3746
3 Locked QAM 256 27 939000000 Hz 0.3 dBmV 36.8 dB 459 3346
4 Locked QAM 256 28 945000000 Hz 0.5 dBmV 37.3 dB 392 3466
5 Locked QAM 256 29 951000000 Hz 0.8 dBmV 37.3 dB 390 3567
6 Locked QAM 256 30 957000000 Hz 0.5 dBmV 37.0 dB 248 1693
7 Locked QAM 256 31 963000000 Hz -0.2 dBmV 37.0 dB 407 3491
8 Locked QAM 256 32 969000000 Hz -0.9 dBmV 36.3 dB 358 2819
Upstream Bonded Channels

Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power
1 Locked ATDMA 4 2560 Ksym/sec 18400000 Hz 37.5 dBmV
2 Locked ATDMA 3 5120 Ksym/sec 23300000 Hz 39.8 dBmV
3 Locked ATDMA 2 5120 Ksym/sec 29800000 Hz 39.7 dBmV
4 Locked ATDMA 1 5120 Ksym/sec 36300000 Hz 41.3 dBmV

Hi are the above signal levels for a netgear cm400 considered good or acceptable? What are the minimum, best, and optimal ranges? I am on premier 150mbps download 10mbps upload legacy Internet plan is the cm400 best for this or is there a better modem recommendation for best possible efficiency and performance, speed, stability, and connectivity? Thank you





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vegasmar6

Contributor II

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79 Messages

Please

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E

EdwardH

Valued Contributor

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755 Messages

The optimal signal ranges are -10db to +10db for the downstream power levels and upstream is 35db to 50db. So the signal levels are both within range. The CM400 modem will work fine for the tier though if you are looking for the best results and future proofing for upgrades to the speeds you would want to look for a modem with at least 16 downstream channels. You can view the list of supported modem on our site https://goo.gl/O7Si2J here.

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vegasmar6

Contributor II

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79 Messages

Would a CM500 be adequate for future proofing and best results?

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ChrisL

Former Moderator

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7.1K Messages

@vegasmar6

If I recall correctly the CM500 is a 16x4 modem which will probably be good until speeds increase again.

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vegasmar6

Contributor II

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79 Messages

@ChrisL

Thanks for the reply so the CM500 would be like the above poster said as in great for my service? Also can you check and see if my current mac model sn is correct along with firmware version? I have the CM500 now I switched it out and I believe on netgear's site it says for the CM500 the latest cox approved firmware is V1.01.05 but my modem at 192.168.100.1 says it is running V1.01.04

Any way you can push it to my modem the latest and greatest and check on the mac model and sn? Thank You

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JonathanJ

Former Moderator

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1.9K Messages

@vegasmar6

V1.01.05 hasn't been approved on our end we can try and push it through. Please let us know when is a good time EST.


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vegasmar6

Contributor II

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79 Messages

Strange because here it shows that it is approved for cox at that version: https://kb.netgear.com/000036375/What-s-the-latest-firmware-version-of-my-NETGEAR-cable-modem-or-modem-router

No need to worry though because there was a maintenance at midnight almost 2 hours ago and the version went to V1.01.05 from V1.01.04 so it looks like the field techs got it automatically without any necessary intervention. I guess it was a good time to do a swap. I know the latest version addressed the security vulnerability and what not. Looks like we are all good otherwise just assuming the right model CM MAC and serial are on the acct. However it is provisioned it is working fine and I'm sure the rep got the correct digits. The self activation VLAN never works always have to call it in. Thank You

So far I am happy with the swap and am noticing the difference between going from an 8x4 D3 to a 16x4 D3. Granted I'm in a maintenance window right now that has restarted the net 3 times including the firmware update but the IVR said there would be work being performed for 90 mins up to 6 hours from 12a-6a and to expect this otherwise it was perfect all day and evening. I know they are discontinuing a lot of the old legacy modems soon. My guess is preparations for this and service improvement. The signal levels don't look too bad normally its bonded from channel 17-32 at the highest frequency and mostly 0 dbmv for all downstreams ups around 40 on all chnls.

Frequency start Value
This field below allows you to modify the frequency the cable modem start with its scan during initialization and registration. Enter the new start frequency and restart the cable modem for it to take effect.
Starting Frequency
 
Startup Procedure
Procedure Status Comment
Acquire Downstream Channel 783000000 Hz Locked
Connectivity State OK Operational
Boot State OK Operational
Security Enabled BPI+
IP Provisioning Mode Honor MDD honorMdd(4)
 
Downstream Bonded Channels
Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables
1 Locked QAM256 1 783000000 Hz 2.7 dBmV 38.5 dB 4 0
2 Locked QAM256 2 789000000 Hz 2.8 dBmV 38.6 dB 20 0
3 Locked QAM256 3 795000000 Hz 2.5 dBmV 38.4 dB 41 0
4 Locked QAM256 4 801000000 Hz 2.7 dBmV 38.6 dB 61 0
5 Locked QAM256 5 807000000 Hz 2.5 dBmV 38.4 dB 55 0
6 Locked QAM256 6 813000000 Hz 2.6 dBmV 38.4 dB 65 22
7 Locked QAM256 7 819000000 Hz 2.4 dBmV 38.3 dB 76 9
8 Locked QAM256 8 825000000 Hz 2.3 dBmV 38.2 dB 47 19
9 Locked QAM256 17 879000000 Hz 1.3 dBmV 37.7 dB 0 0
10 Locked QAM256 18 885000000 Hz 0.8 dBmV 37.3 dB 18 0
11 Locked QAM256 19 891000000 Hz 0.7 dBmV 37.4 dB 0 0
12 Locked QAM256 20 897000000 Hz 0.5 dBmV 37.2 dB 13 0
13 Locked QAM256 21 903000000 Hz 0.3 dBmV 37.2 dB 22 0
14 Locked QAM256 22 909000000 Hz 0.5 dBmV 37.3 dB 33 0
15 Locked QAM256 23 915000000 Hz 0.5 dBmV 37.4 dB 0 0
16 Locked QAM256 24 921000000 Hz 0.8 dBmV 37.6 dB 0 0
 
Upstream Bonded Channels
Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power
1 Locked ATDMA 1 5120 Ksym/sec 36300000 Hz 39.4 dBmV
2 Locked ATDMA 2 5120 Ksym/sec 29800000 Hz 39.4 dBmV
3 Locked ATDMA 3 5120 Ksym/sec 23300000 Hz 39.5 dBmV
4 Locked ATDMA 4 2560 Ksym/sec 18400000 Hz 39.4 dBmV
 
Current System Time:Fri Jul 21 02:04:05 2017

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JonathanJ

Former Moderator

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1.9K Messages

@vegasmar6

Most welcome please let us know if you have further issues.

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vegasmar6

Contributor II

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79 Messages

Thank You

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DeeJ1

Former Moderator

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129 Messages

Hi vegasmar6,

No problem.

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vegasmar6

Contributor II

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79 Messages

Thanks :)

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