@EG - What do you know about the "Event Type Codes"? For example Code 16 and Code 24? The reason I ask is - at the same time I got these log entries I also got hundreds of Corrected & Uncorrected errors, all came today at the same 09:13am minute.
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09:13:04
Wed Feb 14 2024 |
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Notice (6) |
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CM-STATUS message sent. Event Type Code: 16; Chan ID: 33; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=removed;CMTS-MAC=removed;CM-QOS=1.1;CM-VER=3.1; |
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09:13:35
Wed Feb 14 2024 |
|
Notice (6) |
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CM-STATUS message sent. Event Type Code: 24; Chan ID: 33; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=removed;CMTS-MAC=removed;CM-QOS=1.1;CM-VER=3.1; |
| System Up Time |
0 days 20h:33m:24s |
|
| Channel |
Lock Status |
Modulation |
Channel ID |
Freq. (MHz) |
Pwr (dBmV) |
SNR (dB) |
Corrected |
Uncorrected |
| 1 |
Locked |
QAM256 |
17 |
489.0 |
-0.2 |
43.1 |
623 |
254 |
| 2 |
Locked |
QAM256 |
1 |
387.0 |
-1.0 |
42.5 |
624 |
250 |
| 3 |
Locked |
QAM256 |
2 |
393.0 |
-0.6 |
42.7 |
574 |
270 |
| 4 |
Locked |
QAM256 |
3 |
399.0 |
-0.5 |
42.9 |
492 |
286 |
| 5 |
Locked |
QAM256 |
4 |
405.0 |
-1.3 |
42.2 |
553 |
271 |
| 6 |
Locked |
QAM256 |
5 |
411.0 |
-0.8 |
42.8 |
494 |
268 |
| 7 |
Locked |
QAM256 |
6 |
417.0 |
-1.1 |
42.5 |
569 |
302 |
| 8 |
Locked |
QAM256 |
7 |
423.0 |
-1.7 |
42.3 |
602 |
312 |
| 9 |
Locked |
QAM256 |
8 |
435.0 |
-1.3 |
42.6 |
504 |
257 |
| 10 |
Locked |
QAM256 |
9 |
441.0 |
-1.7 |
42.4 |
522 |
263 |
| 11 |
Locked |
QAM256 |
10 |
447.0 |
-0.8 |
43.1 |
472 |
256 |
| 12 |
Locked |
QAM256 |
11 |
453.0 |
-1.2 |
42.6 |
490 |
264 |
| 13 |
Locked |
QAM256 |
12 |
459.0 |
-0.9 |
42.8 |
496 |
227 |
| 14 |
Locked |
QAM256 |
13 |
465.0 |
-0.4 |
43.4 |
456 |
243 |
| 15 |
Locked |
QAM256 |
14 |
471.0 |
-1.0 |
42.7 |
462 |
285 |
| 16 |
Locked |
QAM256 |
15 |
477.0 |
-0.3 |
43.1 |
442 |
179 |
| 17 |
Locked |
QAM256 |
16 |
483.0 |
0.4 |
43.6 |
468 |
198 |
| 18 |
Locked |
QAM256 |
18 |
495.0 |
0.3 |
43.5 |
667 |
239 |
| 19 |
Locked |
QAM256 |
19 |
507.0 |
-0.1 |
43.3 |
1048 |
412 |
| 20 |
Locked |
QAM256 |
20 |
513.0 |
0.4 |
43.7 |
832 |
334 |
| 21 |
Locked |
QAM256 |
21 |
519.0 |
0.1 |
43.6 |
670 |
423 |
| 22 |
Locked |
QAM256 |
22 |
525.0 |
-0.3 |
43.3 |
640 |
271 |
| 23 |
Locked |
QAM256 |
23 |
531.0 |
0.3 |
43.6 |
501 |
173 |
| 24 |
Locked |
QAM256 |
24 |
537.0 |
-0.2 |
43.4 |
456 |
55 |
| 25 |
Locked |
QAM256 |
25 |
543.0 |
-0.5 |
43.1 |
497 |
230 |
| 26 |
Locked |
QAM256 |
26 |
549.0 |
-0.2 |
43.5 |
475 |
88 |
| 27 |
Locked |
QAM256 |
27 |
555.0 |
-0.6 |
42.6 |
503 |
116 |
| 28 |
Locked |
QAM256 |
28 |
561.0 |
-0.6 |
42.8 |
655 |
129 |
| 29 |
Locked |
QAM256 |
29 |
567.0 |
-0.8 |
43.0 |
726 |
150 |
| 30 |
Locked |
QAM256 |
30 |
573.0 |
-1.2 |
42.8 |
665 |
189 |
| 31 |
Locked |
QAM256 |
31 |
579.0 |
-1.2 |
42.9 |
757 |
187 |
| 32 |
Locked |
OFDM PLC |
33 |
690.0 |
-1.5 |
42.2 |
1280542311 |
79 |
|
Accepted Solution
EG
Expert
•
107K Messages
9 months ago
Those notices (16 and 24) are for the OFDM channel, and a small amount is OK. Event type code 16, is the "Notice" of a loss of the FEC (Forward Error Correction) lock for an OFDM profile, and event type code 24 is the FEC recovery on that profile.
The CMTS (Cable Modem Termination System) can be configured with multiple OFDM profiles which have different modulation schemes applied to the OFDM subcarriers. When the CMTS gets the code 16 event, it can dynamically downgrade the active profile for that cable modem.
If you're seeing this constantly I'd suspect your Downstream OFDM channel might be marginal. But, since OFDM can have such an insane modulation order at higher profiles, this can have no noticeable effect on your normal usage. If you aren't suffering any packet-loss or issues with downstream throughput, I wouldn't be too concerned.
(edited)
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