[mrmistoffelees]

Are there any known issues with Hub 4 operating in modem only mode?

Family member had M350 which was always rock solid around the 380 DL speed and upgraded to 1Gb service, speeds now are fluctuating wildly between 300-500mbps. The only thing that's changed apart from level of service is the SH3 was replaced for a SH4. Router (AX6100) etc all remains the same.

Swapped cables etc. but no joy

Thanks in advance.

EDIT: Here's the downstream (i have no idea how to interpret this....)

3.0 Downstream channels
Channel Frequency (Hz) Power (dBmV) SNR (dB) Modulation Channel ID
25 331000000 3.3 37.6 QAM256 25
1 139000000 6.4 39 QAM256 1
2 147000000 6.7 38.6 QAM256 2
3 155000000 7.5 39 QAM256 3
4 163000000 7.2 39 QAM256 4
5 171000000 7 39 QAM256 5
6 179000000 7 38.6 QAM256 6
7 187000000 6.8 39 QAM256 7
8 195000000 6.6 39 QAM256 8
9 203000000 6.6 39 QAM256 9
10 211000000 6.7 38.6 QAM256 10
11 219000000 6.7 39 QAM256 11
12 227000000 6.6 39 QAM256 12
13 235000000 6.5 38.6 QAM256 13
14 243000000 6.5 39 QAM256 14
15 251000000 6.3 39 QAM256 15
16 259000000 6.2 38.6 QAM256 16
17 267000000 5.9 38.6 QAM256 17
18 275000000 5.5 39 QAM256 18
19 283000000 5 38.6 QAM256 19
20 291000000 4.5 38.6 QAM256 20
21 299000000 4.4 38.6 QAM256 21
22 307000000 5 39 QAM256 22
23 315000000 5 39 QAM256 23
24 323000000 4.4 38.6 QAM256 24
26 339000000 0.1 36.6 QAM256 26
27 347000000 1.5 37.4 QAM256 27
28 355000000 3.9 37.6 QAM256 28
29 363000000 4.7 38.6 QAM256 29
30 371000000 4.9 39 QAM256 30
31 379000000 5.1 38.6 QAM256 31


3.0 Downstream channels
Channel Lock Status RxMER (dB) Pre RS Errors Post RS Errors
25 Locked 37.636276 0 0
1 Locked 38.983261 0 0
2 Locked 38.605377 0 0
3 Locked 38.983261 0 0
4 Locked 38.983261 0 0
5 Locked 38.983261 0 0
6 Locked 38.605377 0 0
7 Locked 38.983261 0 0
8 Locked 38.983261 0 0
9 Locked 38.983261 0 0
10 Locked 38.605377 0 0
11 Locked 38.983261 0 0
12 Locked 38.983261 0 0
13 Locked 38.605377 0 0
14 Locked 38.983261 0 0
15 Locked 38.983261 0 0
16 Locked 38.605377 0 0
17 Locked 38.605377 0 0
18 Locked 38.983261 0 0
19 Locked 38.605377 0 0
20 Locked 38.605377 0 0
21 Locked 38.605377 0 0
22 Locked 38.983261 0 0
23 Locked 38.983261 0 0
24 Locked 38.605377 0 0
26 Locked 36.609653 0 0
27 Locked 37.355988 0 0
28 Locked 37.636276 0 0
29 Locked 38.605377 0 0
30 Locked 38.983261 0 0
31 Locked 38.605377 0 0


3.1 Downstream channels
Channel Channel Width (MHz) FFT Type Number of Active Subcarriers Modulation (Active Profile) First Active Subcarrier (Hz)
39 96 4K 1880 QAM4096 424


3.1 Downstream channels
Channel ID Lock Status RxMER Data (dB) PLC Power (dBmV) Correcteds (Active Profile) Uncorrectables (Active Profile)
39 Locked 40 5 858803578 0