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Re: Recommended modem levels?

Remember cablomodem are bi-directionnel operating machine.

Forward section 50 to 870-1,000MHz is usually no problem as we aligned the 64 QAM channels 6 dB lower than the analog channels and 256 QAM 10 dB lower.
The return system is usually a problem, this is why we use a unit at the headend that tell us what level we hit the CMTS between 5-42 MHz. This unit talk back to the technician a each amp. and node that is been aligned for the return section.
For this we use + 15 dBmV at the reurn input, between 5 and 42 MHz as reference at each node and amp.
If you CMTS is set properly and do not have INGRESS and CPD all should be OK.

Good luck.
Joe 50
This is CABL.com posting #357620. Tiny Link: cabl.co/mbFce
Posted in reply to: Recommended modem levels? by woodybeetle
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