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How To Check Your Comcast HDTV Cable Signal Strength

Sometimes you may need to know what kind of signal you're getting to your Comcast CableBox, to help diagnose if you have some sort of problem. Maybe a loose cable, or whatnot. Here's how to do it.

Note: This is for the Comcast Digital HDTV Cable Box (Model DCH3200) (Fig-1). Most likely it will work on other models though.

(Fig-1)

To acces your Diagnostis screen start by turning your cable box off with the remote control and immediately pressing the "Ok / Select" button (Fig-2).

(Fig-2)

Comcast Diagnostics Cable Remote Control

You'll get a screen that looks like the following, you'll want to press the "OK / Select" button one the 2 highlighted options (Outband and Inband Statuses) (Fig-3):

(Fig-3)

Once inside the Inband Status screen (Fig-4), look at your "SNR" (Signal to Noise Ratio). It'll say something like "Bad", "Good", "Fair", etc., to exit the screen just press the "OK / Select" button again.

(Fig-4)

Comcast Diagnostics Cable In-Band Screenshot

Now, go into your "OOB" (Outband) Status screen, and do the same thing (Fig-5)

(Fig-5)

Comcast Diagnostics Cable Out-Band Screenshot

You don't need to go into the screens in the particular order mentioned in this tutorial, just as long as you take a look at them. You generally can't screw anything up by looking through all of the screens so don't be intimidated.

If you get any other status but "Good", start by rebooting your cable box (Here's how). Still the same? check all of your cable connections, particularly the coax cable and any splitters. Beyond that you'll need to call up Comcast.

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[quote=GeekDrop]<h1><br />
How To Check Your Comcast HDTV Cable Signal Strength</h1>
<br />
Sometimes you may need to know what kind of signal you're getting to your Comcast CableBox, to help diagnose if you have some sort of problem. Maybe a loose cable, or whatnot. Here's how to do it.<br />
<br />
<strong>Note:</strong> This is for the Comcast Digital HDTV Cable Box (Model DCH3200) <em>(Fig-1)</em>. Most likely it will work on other models though.<br />
<br />
<div class="rtecenter"><em>(Fig-1)</em></div>
<div class="rtecenter"><img border="0" src="http://images.geekdrop.com/var/albums/tutorials/comcast-hdtv-cable-box.jpg" alt="Comcast HDTV Cable Box" /></div>
<br />
<br />
<br />
<br />
To acces your Diagnostis screen start by turning your cable box off with the remote  control and immediately pressing the "Ok / Select" button <em>(Fig-2)</em>.<br />
<br />
<div class="rtecenter"><em>(Fig-2)</em></div>
<div class="rtecenter"><img border="0" src="http://images.geekdrop.com/var/albums/tutorials/comcast-remote-control-diagnostics.jpg" alt="Comcast Diagnostics Cable Remote Control" /><br />
<br />
<br />
 </div>
<div class="rteleft">You'll get a screen that looks like the following, you'll want to press the "OK / Select" button one the 2 highlighted options (Outband and Inband Statuses) <em>(Fig-3)</em>:<br />
<br />
 </div>
<div class="rtecenter"><br />
<br />
<em>(Fig-3)</em></div>
<div class="rtecenter"><img border="0" src="http://images.geekdrop.com/var/albums/tutorials/comcast-cable-box-hdtv-signal-diagnostics.jpg" alt="Comcast Diagnostics Cable HDTV" /><br />
<br />
<br />
 </div>
<div class="rteleft">Once inside the Inband Status screen <em>(Fig-4)</em>, look at your "SNR" (Signal to Noise Ratio). It'll say something like "Bad", "Good", "Fair", etc., to exit the screen just press the "OK / Select" button again.<br />
<br />
<br />
 </div>
<div class="rtecenter"><em>(Fig-4)</em></div>
<div class="rtecenter"><img border="0" src="http://images.geekdrop.com/var/albums/tutorials/comcast-cable-box-hdtv-signal-inband.jpg" alt="Comcast Diagnostics Cable In-Band Screenshot" /><br />
<br />
 </div>
<div class="rteleft">Now, go into your "OOB" (Outband) Status screen, and do the same thing <em>(Fig-5)<br />
<br />
<br />
</em></div>
<div class="rtecenter"><br />
<em>(Fig-5)</em><br />
<img border="0" src="http://images.geekdrop.com/var/albums/tutorials/comcast-cable-box-hdtv-signal-outband.jpg" alt="Comcast Diagnostics Cable Out-Band Screenshot" /><br />
 </div>
<div class="rteleft">You don't need to go into the screens in the particular order mentioned in this tutorial, just as long as you take a look at them. You generally can't screw anything up by looking through all of the screens so don't be intimidated.<br />
<br />
If you get any other status but "Good", start by rebooting your cable box (<a href="/content/how-to-reboot-power-cycle-your-comcast-hdtv-cable-box"><strong>Here's how</strong></a>). Still the same? check all of your cable connections, particularly the coax cable and any splitters. Beyond that you'll need to call up Comcast.<br />
 </div>[/quote]

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How To Check Your Comcast HDTV Cable Signal Strength

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