Power level check

[Didzi]

Are the below power levels OK for VM's 50Mb service?

Cable Modem Downstream

DS-1 DS-2 DS-3 DS-4
Frequency 299000000 307000000 315000000 323000000
Lock Status
(QAM Lock/FEC Sync/MPEG Lock) Y/Y/Y Y/Y/Y Y/Y/Y Y/Y/Y
Channel Id 153 154 155 156
Modulation 64QAM 64QAM 64QAM 64QAM
Symbol Rate
(Msym/sec) 6.952 6.952 6.952 6.952
Interleave Depth I=12
J=17 I=12
J=17 I=12
J=17 I=12
J=17
Power Level
(dBmV) -9.13 -9.53 -9.44 -9.58
RxMER
(dB) 32.81 32.44 32.72 32.81
Correctable
Codewords 0 0 0 0
Uncorrectable
Codewords 234 240 236 241




Cable Modem Upstream
US-1 US-2 US-3 US-4
Channel Type 2.0 N/A N/A N/A
Channel ID 2 N/A N/A N/A
Frequency
(Hz) 45800000 N/A N/A N/A
Ranging Status Success N/A N/A N/A
Modulation 16QAM N/A N/A N/A
Symbol Rate
(KSym/sec) 5120 N/A N/A N/A
Mini-Slot Size 4 N/A N/A N/A
Power Level
(dBmV) 50.50 N/A N/A N/A
T1 Timeouts 0 0 0 0
T2 Timeouts 0 0 0 0
T3 Timeouts 16 0 0 0
T4 Timeouts

---------- Post added at 17:10 ---------- Previous post was at 17:07 ----------

I forgot to mention I have a 3dB forward path attenuator and also a -6db connector

[jb66]

Take them both off signal too low

[Didzi]

Thanks for the reply.
I have removed both and the signals are below. Is this any better?

Cable Modem Downstream

DS-1 DS-2 DS-3 DS-4
Frequency 299000000 307000000 315000000 323000000
Lock Status
(QAM Lock/FEC Sync/MPEG Lock) Y/Y/Y Y/Y/Y Y/Y/Y Y/Y/Y
Channel Id 153 154 155 156
Modulation 64QAM 64QAM 64QAM 64QAM
Symbol Rate
(Msym/sec) 6.952 6.952 6.952 6.952
Interleave Depth I=12
J=17 I=12
J=17 I=12
J=17 I=12
J=17
Power Level
(dBmV) 0.16 0.07 -0.07 -0.41
RxMER
(dB) 34.29 34.16 34.16 34.29
Correctable
Codewords 0 0 0 0
Uncorrectable
Codewords 238 241 245 250


Cable Modem Downstream

DS-1 DS-2 DS-3 DS-4
Frequency 299000000 307000000 315000000 323000000
Lock Status
(QAM Lock/FEC Sync/MPEG Lock) Y/Y/Y Y/Y/Y Y/Y/Y Y/Y/Y
Channel Id 153 154 155 156
Modulation 64QAM 64QAM 64QAM 64QAM
Symbol Rate
(Msym/sec) 6.952 6.952 6.952 6.952
Interleave Depth I=12
J=17 I=12
J=17 I=12
J=17 I=12
J=17
Power Level
(dBmV) 0.02 -0.00 -0.12 -0.33
RxMER
(dB) 34.29 34.16 34.16 34.29
Correctable
Codewords 0 0 0 0
Uncorrectable
Codewords 238 241 245 250

[jb66]

yeah, and you upstream should be closer to 45 now too

[Didzi]

Thanks for your help jb66, much appreciated.

Sorry I did post the downstream twice instead of posting one of the upstream. The upstream is at 43 as per below.

Cable Modem Upstream
US-1 US-2 US-3 US-4
Channel Type 2.0 N/A N/A N/A
Channel ID 2 N/A N/A N/A
Frequency
(Hz) 45800000 N/A N/A N/A
Ranging Status Success N/A N/A N/A
Modulation 16QAM N/A N/A N/A
Symbol Rate
(KSym/sec) 5120 N/A N/A N/A
Mini-Slot Size 4 N/A N/A N/A
Power Level
(dBmV) 43.75 N/A N/A N/A
T1 Timeouts 0 0 0 0
T2 Timeouts 0 0 0 0
T3 Timeouts 0 0 0 0
T4 Timeouts 0 0 0 0

[TJS]

Pretty much perfect power levels now :)