Extended upstream transmit power - CAX80

Cable diagnostics say I have a poor connection due to upstream power. See diagnostic output below.

I see that extended upstream transmit power is checked. I can click on the setting but nothing changes. It remains checked and light green.

Should I be able to change this or is it under Comcast control?

------------------------

Cable Diagnostic

Status: Poor

Action:
[Upstream Power Level]
Try these actions (Click the Refresh button after each step):
1) Make sure the coaxial cable is tightly connected.
2) Remove any unnecessary splitters.
3) Replace any required splitters.
4) Contact your service provider for troubleshooting help.

Internet Access: Good

Downstream Status: Good

Downstream Power Level: Good

Downstream SNR: Good

Upstream Status: Poor

Upstream Power Level: Poor
Upstream power is poor (29.5dBmV). The recommended level is from 30 to 55dBmV.

Current time: Wed Nov 17 13:17:35 2021

Startup Procedure
Acquire Downstream Channel: 579 MHz Locked
Connectivity State: OK Operational
Boot State: OK Operational
Security: Enabled BPI+

Downstream Bonded Channels
Channel LockedStatus Modulation ChannelID Frequency Power SNR Correctables Uncorrectables
1 Locked 256 QAM 25 579000000 Hz -7.3 dBmV 38.2 dB 27 0
2 Locked 256 QAM 1 417000000 Hz -3.9 dBmV 39.9 dB 18 0
3 Locked 256 QAM 2 423000000 Hz -4 dBmV 39.8 dB 49 0
4 Locked 256 QAM 3 435000000 Hz -4.2 dBmV 39.8 dB 43 23
5 Locked 256 QAM 4 447000000 Hz -4.7 dBmV 39.6 dB 22 16
6 Locked 256 QAM 5 453000000 Hz -4.8 dBmV 39.6 dB 14 24
7 Locked 256 QAM 6 459000000 Hz -5.1 dBmV 39.4 dB 12 27
8 Locked 256 QAM 7 465000000 Hz -5.1 dBmV 39.3 dB 13 26
9 Locked 256 QAM 8 471000000 Hz -5.2 dBmV 39.3 dB 21 16
10 Locked 256 QAM 9 477000000 Hz -5.3 dBmV 39.3 dB 32 4
11 Locked 256 QAM 10 483000000 Hz -5.5 dBmV 39.2 dB 8 0
12 Locked 256 QAM 11 489000000 Hz -5.7 dBmV 39.1 dB 7 0
13 Locked 256 QAM 12 495000000 Hz -5.8 dBmV 39 dB 30 0
14 Locked 256 QAM 13 507000000 Hz -6 dBmV 39 dB 34 0
15 Locked 256 QAM 14 513000000 Hz -5.9 dBmV 39.1 dB 30 0
16 Locked 256 QAM 15 519000000 Hz -6 dBmV 39 dB 35 0
17 Locked 256 QAM 16 525000000 Hz -6.1 dBmV 39 dB 49 0
18 Locked 256 QAM 17 531000000 Hz -6.1 dBmV 38.9 dB 38 5
19 Locked 256 QAM 18 537000000 Hz -6.3 dBmV 38.9 dB 27 24
20 Locked 256 QAM 19 543000000 Hz -6.3 dBmV 38.9 dB 24 26
21 Locked 256 QAM 20 549000000 Hz -6.2 dBmV 38.9 dB 31 29
22 Locked 256 QAM 21 555000000 Hz -6.4 dBmV 38.8 dB 49 13
23 Locked 256 QAM 22 561000000 Hz -6.7 dBmV 38.5 dB 16 0
24 Locked 256 QAM 23 567000000 Hz -7 dBmV 38.5 dB 29 0
25 Locked 256 QAM 24 573000000 Hz -7.2 dBmV 38.3 dB 16 0
26 Locked 256 QAM 26 585000000 Hz -7.2 dBmV 38.3 dB 27 0
27 Locked 256 QAM 27 591000000 Hz -7.3 dBmV 38.2 dB 19 0
28 Locked 256 QAM 28 597000000 Hz -7.2 dBmV 38.1 dB 19 0
29 Locked 256 QAM 29 603000000 Hz -7.1 dBmV 38.1 dB 33 0
30 Locked 256 QAM 30 609000000 Hz -7.1 dBmV 38.1 dB 35 0
31 Locked 256 QAM 31 615000000 Hz -7.1 dBmV 38.1 dB 34 0
32 Locked 256 QAM 32 621000000 Hz -7.2 dBmV 38.1 dB 42 0

Upstream Bonded Channels
Channel LockedStatus ChannelType ChannelID SymbolRate Frequency Power
1 Locked ATDMA 5 2560 Ksym/sec 40400000 Hz 37.8 dBmV
2 Locked ATDMA 1 5120 Ksym/sec 16400000 Hz 29.5 dBmV
3 Locked ATDMA 2 5120 Ksym/sec 22800000 Hz 30.8 dBmV
4 Locked ATDMA 3 5120 Ksym/sec 29200000 Hz 31.5 dBmV
5 Locked ATDMA 4 5120 Ksym/sec 35600000 Hz 33.0 dBmV
6 Not Locked Unknown 0 0 0 0.0
7 Not Locked Unknown 0 0 0 0.0
8 Not Locked Unknown 0 0 0 0.0

Downstream OFDM Channels
Channel LockedStatus ProfileID ChannelID Frequency Power SNR/MER ActiveSubcarrier Unerror Correctable Uncorrectable
1 Locked 0 ,1 ,2 ,3 159 722000000 Hz -8.52 dBmV 36.8 dB 1306 ~ 2789 13944357022 6543801972 0
2 Not Locked 0 0 0 Hz 0 dBmV 0 dB 0 ~ 4095 0 0 0

Upstream OFDMA Channels
Channel LockedStatus ProfileID ChannelID Frequency Power
1 Not Locked 0 0 0 Hz 0 dBmV
2 Not Locked 0 0 0 Hz 0 dBmV