Understanding Cable Network RF Return Path Signal Levels and Balancing

Brady Volpe and John Downey discuss the theory of operation of return path signal levels in the return path. Why does the transmit power increase, rather than decrease like the downstream? How do two way splitters impact upstream and downstream signal levels? Why is the return always higher than the value the of tap +20? And more examples and discussion on the impact of RF in the cable network and troubleshooting.

Here is a link to the SCTE Document: https://www.scte.org/standards/library/catalog/scte-280-understanding-and-troubleshooting-cable-rf-spectrum/

• 0:00 Intro
• 1:00 Understanding FBC doc released
• 2:52 Question on Splitter loss
• 11:00 Impact of padding on modem Tx levels
• 16:40 Why modems transmit at different levels on different taps
• 30:00 Return noise funneling and how to deal with it
• 33:00 Step attenuators and where to put them
• 43:00 Unity gain return path balancing
• 53:00 Making your modems run hotter
• 56:30 Remote Shelf or Remote PHY?
• 58:00 SCTE Expo 2022

Thank you for your time today. This was a great episode.  Our next Episode 85 in September.

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