CM1000 Upstream Light Keeps Turning Amber

Hello all, I've been trying for weeks to resolve an issue with a Netgear ADT Hub. ADT has been out several times to no avail. I've tried everything but can't seem to locate the problem. The only...

FURRYe38

Guru - Experienced User

Aug 16, 2021

Please post a copy and paste of the modems connection status page.
Have the ISP check the signal and line quality UP to the modem. Be sure the ISP provisions the modem correctly.
Be sure there are no coax cable line splitters in the between the modem and ISP service box.
Be sure your using good quality RG6 coax cable up to the modem.
Be sure to power OFF the modem for 1 minute then back ON.
https://community.netgear.com/t5/Cable-Modems-Routers/General-info-and-Troubleshooting-for-Cable-Modems/m-p/1530376#M12853

EMH

Tutor

Aug 16, 2021

FURRYe38 - Thanks for the info. All measures have been taken.

Please post a copy and paste of the modems connection status page. <- done, upstream status light is green at the moment.
Have the ISP check the signal and line quality UP to the modem. Be sure the ISP provisions the modem correctly. <- check
Be sure there are no coax cable line splitters in the between the modem and ISP service box. <- check
Be sure your using good quality RG6 coax cable up to the modem. <- check, including drop line.
Be sure to power OFF the modem for 1 minute then back ON. <- done for 3" at a time (more than once during troubleshooting).

Could you explain the potential issues associated with only locking one upstrem channel?

Cable Connection

Procedure	Status	Comment
Acquire Downstream Channel	429000000 Hz	Locked
Connectivity State	OK	Operational
Boot State	OK	Operational
Security	Enable	BPI+
IP Provisioning Mode	Honor MDD	IPv4 only

Downstream Bonded Channels

Channel	Lock Status	Modulation	Channel ID	Frequency	Power	SNR / MER	Unerrored Codewords	Correctable Codewords	Uncorrectable Codewords
1	Locked	QAM256	45	429000000 Hz	5.9 dBmV	42.5 dB	372483566	0	0
2	Locked	QAM256	1	783000000 Hz	4.1 dBmV	41.5 dB	371516651	0	0
3	Locked	QAM256	2	789000000 Hz	3.7 dBmV	41.3 dB	371519622	0	0
4	Locked	QAM256	3	795000000 Hz	3.6 dBmV	41.2 dB	371523720	0	0
5	Locked	QAM256	5	807000000 Hz	3.4 dBmV	40.9 dB	371527756	0	0
6	Locked	QAM256	13	855000000 Hz	3.2 dBmV	40.4 dB	371531393	0	0
7	Locked	QAM256	15	867000000 Hz	2.6 dBmV	40.3 dB	371535192	0	0
8	Locked	QAM256	16	873000000 Hz	2.4 dBmV	40.2 dB	371537538	0	0
9	Locked	QAM256	17	879000000 Hz	1.9 dBmV	40.0 dB	371541932	0	0
10	Locked	QAM256	18	885000000 Hz	1.6 dBmV	40.0 dB	371545577	0	0
11	Locked	QAM256	19	891000000 Hz	1.9 dBmV	40.0 dB	371549210	0	0
12	Locked	QAM256	20	897000000 Hz	1.9 dBmV	40.1 dB	371552939	0	0
13	Locked	QAM256	21	903000000 Hz	1.8 dBmV	40.0 dB	371556871	0	0
14	Locked	QAM256	22	909000000 Hz	0.4 dBmV	39.4 dB	371560435	0	0
15	Locked	QAM256	23	915000000 Hz	0.2 dBmV	39.2 dB	371564258	0	0
16	Locked	QAM256	24	921000000 Hz	-0.5 dBmV	38.9 dB	371567949	0	0
17	Locked	QAM256	29	951000000 Hz	0.0 dBmV	38.8 dB	371571668	0	0
18	Locked	QAM256	33	357000000 Hz	4.3 dBmV	41.5 dB	371575009	0	0
19	Locked	QAM256	34	363000000 Hz	4.7 dBmV	41.9 dB	371579060	0	0
20	Locked	QAM256	35	369000000 Hz	4.7 dBmV	42.0 dB	371583092	0	0
21	Locked	QAM256	36	375000000 Hz	5.2 dBmV	42.1 dB	371586216	0	0
22	Locked	QAM256	37	381000000 Hz	5.2 dBmV	42.1 dB	371590388	0	0
23	Locked	QAM256	38	387000000 Hz	5.4 dBmV	42.3 dB	371593852	0	0
24	Locked	QAM256	39	393000000 Hz	5.3 dBmV	42.3 dB	371597570	0	0
25	Locked	QAM256	40	399000000 Hz	5.5 dBmV	42.3 dB	371601336	0	0
26	Locked	QAM256	41	405000000 Hz	5.4 dBmV	42.3 dB	371604917	0	0
27	Locked	QAM256	42	411000000 Hz	5.8 dBmV	42.4 dB	371609227	0	0
28	Locked	QAM256	43	417000000 Hz	5.6 dBmV	42.4 dB	371612731	0	0
29	Locked	QAM256	44	423000000 Hz	5.9 dBmV	42.5 dB	371616029	0	0
30	Locked	QAM256	46	435000000 Hz	6.2 dBmV	42.6 dB	371619666	0	0
31	Locked	QAM256	47	441000000 Hz	5.8 dBmV	42.6 dB	371621537	0	0
32	Locked	QAM256	48	447000000 Hz	5.9 dBmV	42.7 dB	371621341	0	0

Upstream Bonded Channels

Channel	Lock Status	Modulation	Channel ID	Frequency	Power
1	Locked	ATDMA	1	19300000 Hz	58.3 dBmV
2	Locked	ATDMA	2	25800000 Hz	58.3 dBmV
3	Locked	ATDMA	3	32200000 Hz	58.3 dBmV
4	Locked	ATDMA	4	38600000 Hz	58.3 dBmV
5	Locked	ATDMA	6	14500000 Hz	55.3 dBmV
6	Not Locked	Unknown	0	0 Hz	0.0 dBmV
7	Not Locked	Unknown	0	0 Hz	0.0 dBmV
8	Not Locked	Unknown	0	0 Hz	0.0 dBmV

Downstream OFDM Channels

Channel	Lock Status	Modulation / Profile ID	Channel ID	Frequency	Power	SNR / MER	Active Subcarrier Number Range	Unerrored Codewords	Correctable Codewords	Uncorrectable Codewords
1	Locked	0, 1, 2, 3	159	300000000 Hz	9.3 dBmV	42.8 dB	1108 ~ 2987	405553628	61437364	412
2	Not Locked	0	0	0 Hz	4.5 dBmV	0.0 dB	0 ~ 4095	0	0	0

Upstream OFDMA Channels

Channel	Lock Status	Modulation / Profile ID	Channel ID	Frequency	Power
1	Not Locked	Unknown	0	0 Hz	0 dBmV
2	Not Locked	Unknown	0	0 Hz	0 dBmV

Current System Time: Mon Aug 16 15:54:14 2021

System Up Time: 2:16:57

EMH
Tutor
Aug 16, 2021
Interesting.
Firmware lised for my CM1000-1AZNAS for my ISP: V3.01.04
My firmware: V6.01.07

Does the ISP push these down? If not, how else could I have gotten there if I didn't do it myself?

Thanks!
- FURRYe38
  Guru - Experienced User
  Aug 17, 2021
  Yes Only the ISP will push FW...
plemans
Guru - Experienced User
Aug 17, 2021
Are you using an amplifier on the coax line? Or a signal attenuator?

Based off the power of your downstream channels, your upstream is rather high. (high enough to cause issues)

Reason I ask is, when you're close to a hub, your downstream will be higher and the upstream tends to run lower.

If you're further away, you have lower downstream and higher upstream. Your numbers downstream indicate you're close to a hub but your upstream indicates your further away. so somethings a bit funky there.

Got a copy of the event logs?
- EMH
  Tutor
  Aug 18, 2021
  plemans Great call. I do have an amplifier in the system, but since I cancelled cable a couple of years ago, I am wondering about its necessity. I will have to address that as soon as I am able.
  
  I am learning (I think) much from your and Furry's posts. I intend to explore such things more when I have a bit longer window to address.
  
  In short - I have the ADT hub up and running again. After hours spent re-routing, by-passing and exchanging out components, it is working again with the original hardware configuration. I am not certain that this was the fix, but Furry's reminder of the basics did cause me to think about the coax cables again and whether they were all firmly connected. I worked from the cable modem backwards re-tightening all connections. Thereafter, the upstream channel locks inceased and the recertification if the ADT hub went through. KISS principle strikes again (I believe).
  
  To be sure there is more in the system to tweak. I'll provide more information in the log to address the power discrepancies later on and get back to you both. Thank you very much for you help to date.
  - plemans
    Guru - Experienced User
    Aug 18, 2021
    If you do get issues, pull that amplifiers out and get a snip of your power levels.
    
    Running 58dbmv on the upstream will cause issues.
    
    If your downstream falls into a decent level, you probably don't need the amplifiers.
    
    If you're needing it for tv, you could use a splitter with one leg going to the modem and the other running to the amp.

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CM1000 Upstream Light Keeps Turning Amber