Hi,
I have recently moved house and below are my current power levels already with a 6db Wideband Attenuator attched, which was left by the previous owner of the house.
I am having some connection issues now and then along with quite a few daily "DBC-REQ Mismatch " warnings in the hub network log so it seem the 6db might not be enough.
Please can i request an engineer so this can be looked into :)
Kind regards
If a BQM shows its fine then it should be fine
We need to see all the upstream channels. You cannot guess how to adjust the downstream without seeing the upstream figures. You may just need moving to another tap on the street cabinet with or without an attenuator or just an attenuator.
Does this help? Ive just copy and paste as when i attach a snip i have to wait for them to be approved. (this is with the current 6db Attenuator attched)
just fyi, im not guessing anything, ive asked for an engineer so hopefully this is something they can help with. Thanks.
3.0 Upstream channels
Channel Frequency (Hz) Power (dBmV) Symbol Rate (ksps) Modulation Channel ID
0 49600000 43 5120 QAM 64 1
1 43100000 42.5 5120 QAM 64 2
2 36600000 41.5 5120 QAM 64 3
3 30100000 41 5120 QAM 64 4
4 23600000 41 5120 QAM 64 5
3.0 Upstream channels
Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts
0 ATDMA 0 0 1 0
1 ATDMA 0 0 1 0
2 ATDMA 0 0 1 0
3 ATDMA 0 0 1 0
4 ATDMA 0 0 1 1
3.1 Upstream channels
Channel Channel Width (MHz) Power (dBmV) FFT Type Modulation
6 10 37.0 2K QAM 256
3.1 Upstream channels
Channel Channel Type Number of Active Subcarriers First Active Subcarrier (Hz) T3 Timeouts T4 Timeouts
6 OFDMA 200 74000000 18 0
Those upstreams look good, probably just need a forward path attenuator. Definitely a technician’s visit required.
What power levels do you get with the attenuator removed?
My post with snips needs to be approved but the levels increase to around 15 - 17ish with the 6db attenuator removed
Forum TeamHi Bradlewis
Welcome to the Community Forums.
Sorry to hear of your service concerns. We can see on the systems on our side as well that our downstream power levels are out of specification. This would require an engineer to attend to investigate further.
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Hi,
These are the levels with the 6db attenuator removed
You have DocSIS 3.1 channels. You need engineer to fit an Equalizer not the old attenuator (these usually had a pinkish rectangle label stating level of attenuation e.g. 6db).
The equaliser is needed for DocSIS 3.1 channels as it will attenuate the stronger signals, but not affect the weaker ones used for DocSIS 3.1 channels. It is selective on frequencies whereas the standard attenuator does everything. The engineer will know if your area runs DocSIS 3.1 channels on the weaker spectrum, most areas do. You can't merely go by power levels alone. You'll probably need the equivalent of a 10db equalizer.
