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docsis 3.0 packet-drops

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docsis 3.0 packet-drops
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Hi guys
after the cable vendor replace the amplifier im having many pack-drops.
this is my docsis 3.0 modem stats:
Startup Procedure
Procedure Status Comment
Acquire Downstream Channel 129000000 Hz Locked
Connectivity State OK Operational
Boot State OK Operational
Configuration File OK
Security Enabled BPI+

Downstream Bonded Channels
Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables
1 QAM256 129000000 Hz 6.4 dBmV 43.1 dB 348 587
2 QAM256 111000000 Hz 7.3 dBmV 43.2 dB 321 808
3 QAM256 117000000 Hz 7.2 dBmV 43.8 dB 300 785
4 QAM256 135000000 Hz 5.8 dBmV 43.1 dB 601 296
5 QAM256 141000000 Hz 7.4 dBmV 43.1 dB 669 210
6 QAM256 147000000 Hz 7.0 dBmV 42.5 dB 615 274
7 QAM256 153000000 Hz 6.8 dBmV 42.3 dB 746 104
8 QAM256 159000000 Hz 6.0 dBmV 42.5 dB 480 388

Total Correctables Total Uncorrectables
4080 3452

Upstream Bonded Channels
Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power
1 TDMA and ATDMA 2560 Ksym/sec 34600000 Hz 45.4 dBmV
2 TDMA and ATDMA 2560 Ksym/sec 42000000 Hz 46.1 dBmV
3 TDMA and ATDMA 2560 Ksym/sec 37800000 Hz 45.6 dBmV
4 TDMA and ATDMA 2560 Ksym/sec 31100000 Hz 46.6 dBmV

CM IP Address Duration Expires
D: -- H: -- M: -- S: -- --- --- -- --:--:-- ----

you are my last resort guys!

thanks in advance

possible ingress

my thoughts are
The downstream frequencies are on the lower end of the spectrum. ingress or signal leaking into the cable around the frequencies that have the higher errors are also used by marine radios and they tend to transmit at higher than average power.
Per the fcc frequency chart, 110-130Mhz FIXED MARITIME MOBILE Radiolocation. are you close to a harbor? only fix would to find and fix the signal leakage or change the downstream frequencies to a higher part of the downstream spectrum. thinking it's just above the fm band because there's too many video channels on the downstream.
if your end user, only thing you can do is make sure all your cable connections are tight

and make sure your cable is

and make sure your cable is not around a power strip or other AC cables that would give upstream errors. Otherwise all looks good. Also grounding but the cable co should have the outside correct, it is probably a loose fitting, broken cable, or bad stab but signals look good for that so I would say signal to noise has an issue.. check the power routing.


Maybe it will sound silly, but what if the problem is the upstream? What about the modem/node/amplifiers capabilities? Your higher upstream is centered on 42Mhz, if your network is similar to the ones I'm familiar, you will have trouble on that one because of the diplex cut. Eventually you can get one or another modem working above 42Mhz, but it will be affected by attenuation and rollof.

Hope it helps.


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