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B_G_M

New Contributor II

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signal-to-noise ratio

Notice that the signal-to-noise ratio for downstream channel 5 is at " 0 ". Is this an acceptable level? From the information that I have read on the internet, the db should be >30

My reading is posted below:

5 Not Locked Unknown 27 747000000 Hz 0.0 dBmV 0.0 dB 0 0

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WiderMouthOpen

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Esteemed Contributor III

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3.5K Messages

Looks like a problem with that frequency. How do the other channels look around it? Any uncorrectables? I would suggest bypassing all splitters and  doing a factory reset and see if the problem continues. If so, you need a technician.

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B_G_M

New Contributor II

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7 Messages

The complete log is below, belive everything looks good except channel 5:

Downstream Bonded Channels (Partial Service)
Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables
1 Locked QAM256 21 237000000 Hz 5.7 dBmV 43 dB 967 0
2 Locked QAM256 5 141000000 Hz 3.8 dBmV 40.2 dB 867 57
3 Locked QAM256 25 735000000 Hz 4.7 dBmV 40 dB 15 0
4 Locked QAM256 26 741000000 Hz 4.5 dBmV 39.7 dB 6 0
5 Not Locked Unknown 27 747000000 Hz 0.0 dBmV 0.0 dB 0 0
6 Locked QAM256 33 783000000 Hz 5.1 dBmV 41.4 dB 39 0
7 Locked QAM256 34 789000000 Hz 4.7 dBmV 41.1 dB 49 0
8 Locked QAM256 37 807000000 Hz 4.4 dBmV 40.9 dB 61 0
9 Locked QAM256 38 813000000 Hz 4 dBmV 40.6 dB 84 0
10 Locked QAM256 39 819000000 Hz 4.4 dBmV 40.7 dB 91 0
11 Locked QAM256 40 825000000 Hz 4.3 dBmV 40.7 dB 86 0
12 Locked QAM256 41 831000000 Hz 4.2 dBmV 40.6 dB 248 418
13 Locked QAM256 42 837000000 Hz 4.1 dBmV 40.5 dB 102 0
14 Locked QAM256 43 843000000 Hz 4.3 dBmV 40.2 dB 116 0
15 Locked QAM256 44 849000000 Hz 4.4 dBmV 40.6 dB 105 0
16 Locked QAM256 45 855000000 Hz 4.2 dBmV 40.4 dB 110 0
 

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W
WiderMouthOpen

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Esteemed Contributor III

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You are right, looks specific to 747Mhz which seems to be LTE/CDMA. Do you have any splitter to bypass? Doesn't take much for cellular ingress to leak in.

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B_G_M

New Contributor II

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There are two within the closet cable box, I will bypass and rerun the logs.

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