Upstream RF Troubleshooting
Upstream RF Troubleshooting
Upstream RF Troubleshooting
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Microreflections<br />
• In this example,<br />
an approx. -23<br />
dBc echo at<br />
~720 ns causes<br />
visible<br />
amplitude<br />
ripple across<br />
the 5-40 MHz<br />
spectrum<br />
• Group delay<br />
ripple also is<br />
present<br />
Courtesy of Holtzman, Inc.<br />
<strong>Upstream</strong> <strong>RF</strong><br />
<strong>Troubleshooting</strong><br />
© 2003, Cisco Systems, Inc. All rights reserved.<br />
Amplitude ripple<br />
Group delay ripple<br />
Echo<br />
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