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Forum Discussion
CAX30 Downstream SNR Partial
Hello,
i am showing Poor Cable Connection, and it states that the Downstream SNR specifically as the issue. Yellow color and marked "partial".
the following is my Diagnostic result, thank you :
Cable Diagnostic
Startup Procedure
CM status: OPERATIONAL
DownstreamChannel: 807000000Hz Locked
ConnectivityState: OK operational(12),
BootState: OK Operational
Security: Enabled
IPProvisioningMode: 12 IPv4Only
Downstream Bonded Channels
Channel LockedStatus Modulation Channel ID Frequency Power SNR Correctables Uncorrectables
1 Locked 256 QAM 13 807000000 Hz -10.6 dBmV 31.0 dB 7378 7489
2 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0
3 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0
4 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0
5 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0
6 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0
7 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0
8 Locked 256 QAM 7 771000000 Hz -10.1 dBmV 30.2 dB 574355 13314
9 Locked 256 QAM 8 777000000 Hz -10.3 dBmV 32.3 dB 86201 240514
10 Locked 256 QAM 9 783000000 Hz -10.4 dBmV 32.1 dB 215012 562895
11 Locked 256 QAM 10 789000000 Hz -10.3 dBmV 32.8 dB 15180 22497
12 Locked 256 QAM 11 795000000 Hz -10.4 dBmV 32.4 dB 4289 7855
13 Locked 256 QAM 12 801000000 Hz -10.6 dBmV 31.4 dB 1448 816
14 Locked 256 QAM 14 813000000 Hz -10.5 dBmV 31.2 dB 1617 767
15 Locked 256 QAM 15 819000000 Hz -10.7 dBmV 30.7 dB 1509 839
16 Locked 256 QAM 16 825000000 Hz -10.9 dBmV 29.8 dB 35539 55148
17 Locked 256 QAM 17 831000000 Hz -10.9 dBmV 28.5 dB 260924 43532
18 Locked 256 QAM 18 837000000 Hz -11.1 dBmV 27.5 dB 4470586 64126
19 Locked 256 QAM 19 843000000 Hz -11.5 dBmV 28.4 dB 183066 80193
20 Locked 256 QAM 20 849000000 Hz -11.7 dBmV 29.9 dB 2921 817
21 Locked 256 QAM 21 855000000 Hz -11.6 dBmV 31.6 dB 1618 806
22 Locked 256 QAM 22 861000000 Hz -11.6 dBmV 34.1 dB 1521 785
23 Locked 256 QAM 23 867000000 Hz -11.6 dBmV 31.0 dB 347048488 563617873
24 Locked 256 QAM 24 873000000 Hz -11.8 dBmV 0.0 dB 8429274 26508999
25 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0
26 Locked 256 QAM 42 219000000 Hz -8.9 dBmV 0.0 dB 214298770 22310428
27 Locked 256 QAM 43 225000000 Hz -9.0 dBmV 0.0 dB 401619997 259403859
28 Locked 256 QAM 44 231000000 Hz -9.6 dBmV 26.4 dB 720855659 369642434
29 Locked 256 QAM 45 237000000 Hz -9.5 dBmV 26.3 dB 101845126 85629893
30 Locked 256 QAM 46 243000000 Hz -9.2 dBmV 27.7 dB 498905311 693952578
31 Locked 256 QAM 47 249000000 Hz -9.3 dBmV 27.9 dB 579059299 430152811
32 Locked 256 QAM 48 255000000 Hz -9.3 dBmV 28.5 dB 569065406 432509047
Upstream Bonded Channels
Channel LockedStatus ChannelType Channel ID SymbolRate Frequency Power
1 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0 dBmV
2 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0 dBmV
3 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0 dBmV
4 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0 dBmV
5 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0 dBmV
6 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0 dBmV
7 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0 dBmV
8 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0 dBmV
Downstream OFDM Channels
Channel Channel ID Frequency Power SNR/MER ActiveSubcarrier Correctable Uncorrectable
1 159 300000000 Hz -8.3 dBmV 28.7 dB 296 ~ 7895 309768716 58
2 160 918000000 Hz -9.1 dBmV 32.6 dB 2216 ~ 5975 309768716 58
Upstream OFDMA Channels
Channel UpstreamMuted RangingStatus Subc Zero Freq ActiveSubcarrier SymbolsPerFrame Power
2 False Success 36.8 MHz 148 ~ 1907 12 50 dBmV
2 n/a Other 0 MHz 0 ~ 0 0 0 dBmV
1 Reply
your power levels are out of spec too. And you have non-locked channels.
Start with removing any amplifiers, signal attenuators, or splitters from the coax.
From there check the line for kinks, damage, moisture in the line.
Check the connectors for improperly made ends, foil touching the copper coax line, loose connections, bad/old/cheap connectors, or corroded connections. Replace them if you do.
If you can, simply connect the modem right where the coax comes into the home. This prevents wiring in the home from being the issue. And some ISP’s charge if the wiring issue is in the home. So this helps prevent this.And a request, when posting these values, simply take a screensnip and post the photo. Much easier to read
