Forum Discussion

Aspirant

Aug 13, 2023

Netgear Nighthawk CAX80 Downstream Light Blinking

Good Afternoon The downstream light on my CAX80 is blinking steadily. Everything seems to be working fine with good speed with the internet and all devices stay connected. I read where if th...

FURRYe38

Guru - Experienced User

Aug 13, 2023

What Firmware version is currently loaded?
Please post a copy and paste of the modems connection status and event log page.
https://kb.netgear.com/30007/How-do-I-obtain-the-cable-connection-information-from-a-NETGEAR-cable-modem-modem-router
https://kb.netgear.com/30008/How-do-I-view-or-clear-the-event-logs-on-my-NETGEAR-cable-modem-or-modem-router

ereynolds62

Aspirant

Aug 14, 2023

Firmware Version: V2.1.5.2

Cable Connection Status

Cable Diagnostic

Status: Good

Action: Your setup looks fine. If you are still experience an internet issue, the can provide additional troubleshooting info.

Internet Access:

Downstream Status:

Upstream Status:

Refresh Save Cable Diagnostic Info

Advanced Information

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	567 MHz	Locked
Connectivity State	OK	Operational
Boot State	OK	Operational
Security	Enabled	BPI+

Downstream Bonded Channels

Channel	Lock Status	Modulation	Channel ID	Frequency	Power	SNR	Correctables	Uncorrectables
1	Locked	256 QAM	20	567000000 Hz	-1.6 dBmV	44.3 dB	77	53
2	Locked	256 QAM	1	453000000 Hz	-0.7 dBmV	45.2 dB	75	56
3	Locked	256 QAM	2	459000000 Hz	-0.9 dBmV	45.1 dB	76	56
4	Locked	256 QAM	3	465000000 Hz	-0.8 dBmV	45.1 dB	58	74
5	Locked	256 QAM	4	471000000 Hz	-0.9 dBmV	45.0 dB	79	49
6	Locked	256 QAM	5	477000000 Hz	-0.6 dBmV	45.1 dB	72	57
7	Locked	256 QAM	6	483000000 Hz	-0.5 dBmV	45.2 dB	63	70
8	Locked	256 QAM	7	489000000 Hz	-0.5 dBmV	45.2 dB	74	56
9	Locked	256 QAM	8	495000000 Hz	-0.6 dBmV	45.1 dB	73	55
10	Locked	256 QAM	9	501000000 Hz	-0.5 dBmV	45.2 dB	74	59
11	Locked	256 QAM	10	507000000 Hz	-0.8 dBmV	45.0 dB	74	56
12	Locked	256 QAM	11	513000000 Hz	-0.7 dBmV	45.0 dB	69	61
13	Locked	256 QAM	12	519000000 Hz	-0.8 dBmV	44.9 dB	74	60
14	Locked	256 QAM	13	525000000 Hz	-1.0 dBmV	44.9 dB	70	60
15	Locked	256 QAM	14	531000000 Hz	-1.2 dBmV	44.8 dB	77	53
16	Locked	256 QAM	15	537000000 Hz	-1.3 dBmV	44.7 dB	70	61
17	Locked	256 QAM	16	543000000 Hz	-1.6 dBmV	44.5 dB	72	57
18	Locked	256 QAM	17	549000000 Hz	-2.0 dBmV	44.3 dB	76	57
19	Locked	256 QAM	18	555000000 Hz	-1.7 dBmV	44.3 dB	78	57
20	Locked	256 QAM	19	561000000 Hz	-1.7 dBmV	44.3 dB	74	58
21	Locked	256 QAM	21	573000000 Hz	-1.8 dBmV	44.3 dB	73	57
22	Locked	256 QAM	22	579000000 Hz	-2.1 dBmV	44.1 dB	66	67
23	Locked	256 QAM	23	585000000 Hz	-2.3 dBmV	43.8 dB	65	65
24	Locked	256 QAM	24	591000000 Hz	-2.1 dBmV	43.9 dB	79	56
25	Locked	256 QAM	25	597000000 Hz	-2.2 dBmV	43.9 dB	73	64
26	Locked	256 QAM	26	603000000 Hz	-1.9 dBmV	44.1 dB	70	58
27	Locked	256 QAM	27	609000000 Hz	-2.3 dBmV	43.8 dB	77	56
28	Locked	256 QAM	28	615000000 Hz	-2.6 dBmV	43.5 dB	79	54
29	Locked	256 QAM	29	621000000 Hz	-2.6 dBmV	43.5 dB	75	58
30	Locked	256 QAM	30	627000000 Hz	-2.7 dBmV	43.5 dB	70	64
31	Locked	256 QAM	31	633000000 Hz	-2.5 dBmV	43.6 dB	79	56
32	Locked	256 QAM	32	639000000 Hz	-2.6 dBmV	43.5 dB	73	59

Upstream Bonded Channels

Channel	Lock Status	US Channel Type	Channel ID	Symbol Rate	Frequency	Power
1	Locked	ATDMA	19	5120 Ksym/sec	29200000 Hz	36.8 dBmV
2	Locked	ATDMA	18	5120 Ksym/sec	22800000 Hz	35.8 dBmV
3	Locked	ATDMA	17	5120 Ksym/sec	16400000 Hz	34.8 dBmV
4	Locked	ATDMA	20	5120 Ksym/sec	35600000 Hz	37.0 dBmV
5	Not Locked	Unknown	0	0	0	0.0 dBmV
6	Not Locked	Unknown	0	0	0	0.0 dBmV
7	Not Locked	Unknown	0	0	0	0.0 dBmV
8	Not Locked	Unknown	0	0	0	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	193	957000000 Hz	-9.32 dBmV	39.4 dB	148 ~ 3947	164080522	137070232	2
2	Not Locked	0	0	0 Hz	0 dBmV	0 dB	0 ~ 4095	0	0	0

Upstream OFDMA Channels

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

Extended Upstream Transmit PowerEnable Extended Upstream Transmit Power

Current System Time:Mon Aug 14 16:55:48 2023System Up Time:12:10:22

ereynolds62

Aspirant

Aug 14, 2023

Event Lot

Time	Priority	Description
Mon Aug 14 15:50:52 2023	Notice (6)	CM-STATUS message sent. Event Type Code: 24; Chan ID: 193; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 2 3.;CM-MAC=94:18:65:a5:37:db;CMTS-MAC=00:90:f0:5e:04:00;CM-QOS=1.1;CM-VER=3.1;
Mon Aug 14 15:44:57 2023	Notice (6)	CM-STATUS message sent. Event Type Code: 16; Chan ID: 193; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 2.;CM-MAC=94:18:65:a5:37:db;CMTS-MAC=00:90:f0:5e:04:00;CM-QOS=1.1;CM-VER=3.1;
Mon Aug 14 13:53:58 2023	Notice (6)	CM-STATUS message sent. Event Type Code: 24; Chan ID: 193; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=94:18:65:a5:37:db;CMTS-MAC=00:90:f0:5e:04:00;CM-QOS=1.1;CM-VER=3.1;
Mon Aug 14 13:52:57 2023	Notice (6)	CM-STATUS message sent. Event Type Code: 16; Chan ID: 193; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=94:18:65:a5:37:db;CMTS-MAC=00:90:f0:5e:04:00;CM-QOS=1.1;CM-VER=3.1;
Mon Aug 14 04:46:50 2023	Critical (3)	UCD invalid or channel unusable;CM-MAC=94:18:65:a5:37:db;CMTS-MAC=00:90:f0:5e:04:00;CM-QOS=1.1;CM-VER=3.1;
Mon Aug 14 04:46:48 2023	Notice (6)	DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=94:18:65:a5:37:db;CMTS-MAC=00:90:f0:5e:04:00;CM-QOS=1.1;CM-VER=3.1;
Mon Aug 14 04:46:24 2023	Notice (6)	TLV-11 - unrecognized OID;CM-MAC=94:18:65:a5:37:db;CMTS-MAC=00:90:f0:5e:04:00;CM-QOS=1.1;CM-VER=3.1;
Thu Jan 1 00:00:50 1970	Notice (6)	Honoring MDD; IP provisioning mode = IPv6
Thu Jan 1 00:00:45 1970	Critical (3)	UCD invalid or channel unusable;CM-MAC=94:18:65:a5:37:db;CMTS-MAC=00:90:f0:5e:04:00;CM-QOS=1.1;CM-VER=3.1;
Thu Jan 1 00:00:43 1970	Critical (3)	SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=94:18:65:a5:37:db;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Sun Aug 13 10:32:38 2023	Critical (3)	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=94:18:65:a5:37:db;CMTS-MAC=00:90:f0:5e:04:00;CM-QOS=1.1;CM-VER=3.1;
Sat Aug 12 13:49:27 2023	Critical (3)	UCD invalid or channel unusable;CM-MAC=94:18:65:a5:37:db;CMTS-MAC=00:90:f0:5e:04:00;CM-QOS=1.1;CM-VER=3.1;
Sat Aug 12 13:39:26 2023	Critical (3)	UCD invalid or channel unusable;CM-MAC=94:18:65:a5:37:db;CMTS-MAC=00:90:f0:5e:04:00;CM-QOS=1.1;CM-VER=3.1;
Sat Aug 12 01:22:14 2023	Critical (3)	UCD invalid or channel unusable;CM-MAC=94:18:65:a5:37:db;CMTS-MAC=00:90:f0:5e:04:00;CM-QOS=1.1;CM-VER=3.1;
Thu Jan 1 00:00:44 1970	Critical (3)	UCD invalid or channel unusable;CM-MAC=94:18:65:a5:37:db;CMTS-MAC=00:90:f0:5e:04:00;CM-QOS=1.1;CM-VER=3.1;
Thu Jan 1 00:00:43 1970	Critical (3)	SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=94:18:65:a5:37:db;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Fri Aug 11 14:10:14 2023	Critical (3)	UCD invalid or channel unusable;CM-MAC=94:18:65:a5:37:db;CMTS-MAC=00:90:f0:5e:04:00;CM-QOS=1.1;CM-VER=3.1;
Thu Jan 1 00:00:46 1970	Critical (3)	UCD invalid or channel unusable;CM-MAC=94:18:65:a5:37:db;CMTS-MAC=00:90:f0:5e:04:00;CM-QOS=1.1;CM-VER=3.1;
Thu Jan 1 00:00:44 1970	Critical (3)	SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=94:18:65:a5:37:db;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Thu Aug 10 02:25:58 2023	Critical (3)	UCD invalid or channel unusable;CM-MAC=94:18:65:a5:37:db;CMTS-MAC=00:90:f0:5e:04:00;CM-QOS=1.1;CM-VER=3.1;
Thu Aug 10 02:25:56 2023	Critical (3)	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=94:18:65:a5:37:db;CMTS-MAC=00:90:f0:5e:04:00;CM-QOS=1.1;CM-VER=3.1;
Thu Aug 10 02:25:56 2023	Critical (3)	UCD invalid or channel unusable;CM-MAC=94:18:65:a5:37:db;CMTS-MAC=00:90:f0:5e:04:00;CM-QOS=1.1;CM-VER=3.1;
Thu Aug 10 02:25:40 2023	Critical (3)	UCD invalid or channel unusable;CM-MAC=94:18:65:a5:37:db;CMTS-MAC=00:90:f0:5e:04:00;CM-QOS=1.1;CM-VER=3.1;
Thu Aug 10 02:23:04 2023	Critical (3)	SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=94:18:65:a5:37:db;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Thu Aug 10 02:22:59 2023	Critical (3)	Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=94:18:65:a5:37:db;CMTS-MAC=00:90:f0:5e:04:00;CM-QOS=1.1;CM-VER=3.1;
Thu Aug 10 02:22:59 2023	Critical (3)	SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=94:18:65:a5:37:db;CMTS-MAC=00:90:f0:5e:04:00;CM-QOS=1.1;CM-VER=3.1;
Thu Aug 10 02:22:58 2023	Critical (3)	Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=94:18:65:a5:37:db;CMTS-MAC=00:90:f0:5e:04:00;CM-QOS=1.1;CM-VER=3.1;
Thu Aug 10 02:22:20 2023	Critical (3)	SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=94:18:65:a5:37:db;CMTS-MAC=00:90:f0:5e:04:00;CM-QOS=1.1;CM-VER=3.1;
Thu Aug 10 02:22:13 2023	Critical (3)	SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=94:18:65:a5:37:db;CMTS-MAC=00:90:f0:5e:04:00;CM-QOS=1.1;CM-VER=3.1;
Thu Aug 10 02:22:10 2023	Critical (3)	SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=94:18:65:a5:37:db;CMTS-MAC=00:90:f0:5e:04:00;CM-QOS=1.1;CM-VER=3.1;
Thu Aug 10 02:21:14 2023	Critical (3)	UCD invalid or channel unusable;CM-MAC=94:18:65:a5:37:db;CMTS-MAC=00:90:f0:5e:04:00;CM-QOS=1.1;CM-VER=3.1;
Thu Aug 10 02:21:14 2023	Critical (3)	No Ranging Response received - T3 time-out;CM-MAC=94:18:65:a5:37:db;CMTS-MAC=00:90:f0:5e:04:00;CM-QOS=1.1;CM-VER=3.1;
Thu Aug 10 02:21:12 2023	Critical (3)	UCD invalid or channel unusable;CM-MAC=94:18:65:a5:37:db;CMTS-MAC=00:90:f0:5e:04:00;CM-QOS=1.1;CM-VER=3.1;
Thu Aug 10 02:21:10 2023	Critical (3)	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=94:18:65:a5:37:db;CMTS-MAC=00:90:f0:5e:04:00;CM-QOS=1.1;CM-VER=3.1;
Thu Aug 10 02:20:56 2023	Critical (3)	UCD invalid or channel unusable;CM-MAC=94:18:65:a5:37:db;CMTS-MAC=00:90:f0:5e:04:00;CM-QOS=1.1;CM-VER=3.1;
Thu Aug 10 02:19:34 2023	Critical (3)	SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=94:18:65:a5:37:db;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Thu Aug 10 02:19:33 2023	Critical (3)	DHCP failed - DHCP Solicit sent, No DHCP Advertise received;CM-MAC=94:18:65:a5:37:db;CMTS-MAC=00:90:f0:5e:04:00;CM-QOS=1.1;CM-VER=3.1;
Thu Aug 10 02:18:52 2023	Critical (3)	UCD invalid or channel unusable;CM-MAC=94:18:65:a5:37:db;CMTS-MAC=00:90:f0:5e:04:00;CM-QOS=1.1;CM-VER=3.1;
Thu Aug 10 02:18:50 2023	Critical (3)	DHCP failed - DHCP Solicit sent, No DHCP Advertise received;CM-MAC=94:18:65:a5:37:db;CMTS-MAC=00:90:f0:5e:04:00;CM-QOS=1.1;CM-VER=3.1;
Thu Aug 10 02:18:04 2023	Critical (3)	UCD invalid or channel unusable;CM-MAC=94:18:65:a5:37:db;CMTS-MAC=00:90:f0:5e:04:00;CM-QOS=1.1;CM-VER=3.1;