Visitor
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XB8 Partial Service - High Downstream Power (+13.5 dBmV) and Unknown Modulation
Hello, I am experiencing frequent dropped WiFi calls and packet loss. I have an XB8 gateway and my signal levels are out of spec.
Downstream Power: Ranging from +12.6 dBmV to +13.5 dBmV (Overspec).
SNR: Failing at 33.6 dB - 34.2 dB.
Modulation: Showing as "Unknown" on multiple channels (including 15 and 34).
OFDM (Channel 193): Missing or failing to hold frequency lock.
Upstream: Power is 41.8 dBmV, but Channel 43 shows 0 Symbol Rate and has fallen back to TDMA.
I have already tightened all coax connections and bypassed internal splitters. Based on the "Unknown" modulation and high power tilt, I believe there is an ingress or equipment issue at the tap. Can an official employee please help me schedule a line technician?
XfinityRay
Official Employee
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3.7K Messages
2 hours ago
Greetings, @user_v6xyaf! We would be happy to assist you in getting someone out to your location to address the signals. I also wanted to make sure you are aware that any time you need to troubleshoot our Xfinity app can assist you step by step. It will run a scan for any area interruptions, send signals to your equipment, and allow you to schedule a visit if that is needed.
Please send us a direct message with your full name and complete service address to “Xfinity Support”. To do so, click on the direct messaging icon located at the top right of this forums page.
Here's the detailed steps to direct message us:
• Click "Sign In" if necessary
• Click the "Direct Message” icon (upper right corner of this page)
• Click the "New message" (pencil and paper) icon
• Type "Xfinity Support" in the to line and select "Xfinity Support" from the drop-down list
• Type your message in the text area near the bottom of the window
• Press Enter to send your message
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