Modem Signal Levels - TekSavvy Community
<main> <article class="userContent"> <h2 data-id="what-are-rf-signals">What are RF signals?</h2><p><strong>RF</strong> or <strong>radio-frequency</strong> signals are an important tool to help us discover the root cause of an issue on a cable customer's connection. The signals should be checked each time there is an issue with your cable connection.</p><h2 data-id="how-do-you-obtain-rf-signals">How do you obtain RF signals?</h2><p>Signals can also be obtained modem itself. You can find the signals by logging into the modem's user interface. (Usually at <a href="https://community.teksavvy.com/home/leaving?allowTrusted=1&target=http%3A%2F%2F192.168.100.1%2F" rel="nofollow noreferrer ugc"><strong>http://192.168.100.1/</strong></a>)</p><h2 data-id="how-to-read-signals">How to read signals?</h2><p><strong>ESN</strong>: This is the modem <strong>serial number</strong>.</p><p><strong>MAC</strong>: This is the modem <strong>MAC address</strong>.</p><p><strong>CPE IP (IPv4/IPv6)</strong>: This shows the modem's <strong>public IP address</strong>.</p><p><strong>Signal Levels</strong>: The signal strength of the <strong>cable channels</strong> through the coax cable.</p><ul><li><strong>Upstream (Tx)</strong>: This shows the signal strength of the channels for upload. Usually, only 3 signals will appear on.<ul><li>The upstream signal should be within the specified range. Anything outside of this range indicates a signal issue.</li></ul></li><li><strong>Downstream (Rx)</strong>: This shows the signal strength of the channels for download. The number of channels depends on the modem model.<ul><li>The downstream signal should be within the specified range. Anything outside of this range indicates a signal issue.</li></ul></li></ul><p><strong>SNR</strong>: The SNR or <strong>signal-to-noise ratio</strong> shows how clear the signal is to the modem. The higher the number, the less static there is on the line. Anything too low indicates a signal issue.</p><p>The SNR should be <strong>higher than 25bB</strong>. Anything <strong>lower than 25dB</strong> indicates a signal issue.</p><h2 data-id="what-is-the-signal-range">What is the signal range?</h2><ul><li>The <strong>Downstream/Rx</strong> range of the modem is between <strong>-10 to +10 dBmV</strong></li><li>The <strong>Upstream/Tx</strong> range of the modem will vary depending on the time of the year but can range from <strong>+35 to between +51 to +54 dBmV</strong></li><li>The <strong>SNR</strong> should be higher than <strong>25dB</strong>. Anything lower indicates a signal issue.</li></ul> </article> </main>
