Weird power level distribution and RS errors

[i_saw_drones]

Hi All,

I recently noticed a bit of lag now and again with my Hub 3, and I decided to check the stats on it and found that there's a bit of a discrepancy regarding the power levels of downstream - is it normal for some channels have very negative power and others positive power ?

There's also quite a lot of post-RS errors on those channels which have a more extreme power values.

Please could you let me know if this is an issue with my line, or I can do something else to improve this, or does this need an engineer visit? Thank you!

Below stats have been taken after the router has been on for around 6 hours.

Downstream bonded channels

Channel Frequency (Hz) Power (dBmV) SNR (dB) Modulation Channel ID

1	259000000	-9.9	28	256 qam	16
2	147000000	7.5	40	256 qam	2
3	155000000	8	40	256 qam	3
4	163000000	8.3	40	256 qam	4
5	171000000	8.3	40	256 qam	5
6	179000000	7.9	40	256 qam	6
7	187000000	7.5	40	256 qam	7
8	195000000	7	40	256 qam	8
9	203000000	6.1	40	256 qam	9
10	211000000	5.4	40	256 qam	10
11	219000000	4.1	38	256 qam	11
12	227000000	2.7	38	256 qam	12
13	235000000	0.7	37	256 qam	13
14	243000000	-1.9	35	256 qam	14
15	251000000	-5.4	32	256 qam	15
16	267000000	-10	27	256 qam	17
17	275000000	-5.4	31	256 qam	18
18	283000000	-1.7	35	256 qam	19
19	291000000	0.5	37	256 qam	20
20	299000000	2.5	37	256 qam	21
21	307000000	3.7	38	256 qam	22
22	315000000	5.1	40	256 qam	23
23	323000000	6	40	256 qam	24
24	331000000	6.5	40	256 qam	25

Downstream bonded channels

Channel Locked Status RxMER (dB) Pre RS Errors Post RS Errors

1	Locked	28.2	391525920	38675
2	Locked	40.3	23	0
3	Locked	40.3	13	0
4	Locked	40.3	7	0
5	Locked	40.9	6	0
6	Locked	40.3	14	0
7	Locked	40.3	11	0
8	Locked	40.3	34	0
9	Locked	40.9	10	0
10	Locked	40.9	6	0
11	Locked	38.9	10	0
12	Locked	38.6	14	0
13	Locked	37.3	19	0
14	Locked	35	476	0
15	Locked	32.2	2394287	14
16	Locked	27.8	411019167	652719
17	Locked	31.9	5039281	0
18	Locked	35	641	0
19	Locked	37.3	21	0
20	Locked	37.6	33	0
21	Locked	38.9	10	0
22	Locked	40.3	9	0
23	Locked	40.3	18	0
24	Locked	40.9	3	0

[gitty]

This type of impairment is called a suck-out. It looks like this when you plot it:

"After" is mapped to the right y axis. There is still a hint of the issue, but as long as it doesn't impact your service...

[Matthew_ML]

Thank you for posting this graph gitty.

I hope your services have improved as I can see my colleague did help you out with this.

Any further issues do let us know 🙂