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Understanding DOCSIS 3. 1 Cable Modem Transmit Power - Broadband Library
Frequently, failure to have enough transmit power to communicate with the CMTS is a key reason that modems are unable to register with the CMTS or the root cause for modems to frequently drop offline and re-register (often called flapping modems)
Solved: Understanding TX RX light level - Cisco Community
i wanted to clarify my understanding what should be the TX and RX dBm light levels Correct me if i have not understood correctly: RX light level: RX dBm signal should be between -18 to -25 dBm For example if the RX is -40 dBm that is indicating the port is not sending out any signal
CMTS RF Troubleshooting - Volpe Firm
US phy MER(SNR)_estimate for good packets -38 9437 dB Cable7 1 0 Upstream 1 is up US phy MER(SNR)_estimate for good packets -38 5114 dB Cable7 1 0 Upstream 2 is up US phy MER(SNR)_estimate for good packets -38 9437 dB Cable7 1 0 Upstream 3 is up US phy MER(SNR)_estimate for good packets -38 2657 dB Cable7 1 0 Upstream 4 is up
Dynamic Range Window OFDMA Troubleshooting - Volpe Firm
CMTS normally administers Dynamic Range Window of 12 dB [DOCSIS MULPIv3 1] which is sufficient to accommodate plant tilts of up to 10 dB from lower to upper edge of US band Since fidelity requirements are specified in flat freq conditions from top of Dynamic Range Window, it’s desirable to maintain Cable Modem Tx power levels as close to top
DOCSIS 3. 1 Cable Modem Transmit Power - Volpe Firm
Frequently, failure to have enough transmit power to communicate with the CMTS is a key reason that modems are unable to register with the CMTS or the root cause for modems to frequently drop offline and re-register (often called flapping modems)
Solved: Rx power low warning - Cisco Community
You may have a bad SFP+ in that port The other option to look at is to clean the fiber patches with alcohol and see if that makes a difference Are there any errors on the interfaces (sh interface)?
Determining RF or Configuration Issues on the CMTS - Cisco
One of the most powerful tools on the CMTS for diagnosing RF problems on cable networks is the show cable flap-list command To assist in locating cable plant problems, the CMTS maintains a database of flapping cable modems This document highlights the most important practical information about this feature
Cable Modem Signal Levels - VoIP Mechanic
Downstream Power Level (Rx)-This level is the downstream signal strength and can be plus or minus and shows the amount of signal received by the modem from the cable companies' transmitter Typically the lower you go in the minus range the more the modem struggles to keep being acquired
What causes modems to have low TX power in HFC plant? - Reddit
It’s wants the RX value at the CMTS at a zero (give or take a couple dB) You can drop you upstream modulation profile to qpsk or 16qam, but careful with utilization If your modems on average are communicating at 35dB power, I would look at padding the node with an extra +5 to +10 dB
Actual BLE transmit power vs. configured transmit power
Can you explain how the CONFIG_BT_CTLR_TX_PWR_ANTENNA configuration determines the output power of the 5340 and how we can adjust the values to get the expected transmit power at the antenna? We are using nRF Connect SDK 2 6 0