RG-6

<h2 id="applications">Applications</h2>
<p>A common type of 75 ohm coaxial cable is <a href="/facts/Cable_television/GzXa4pbW">cable television</a> (CATV) distribution coax, used to route cable television signals to and within homes.  CATV distribution coax typically has a <a href="/facts/Copper-clad_steel/wmbxJaly">copper-clad steel</a> (CCS) center conductor and a combination aluminum foil/aluminum braid shield, typically with low coverage (about 60%). 75 ohm  cables are also used in professional video applications, carrying either base band analog video signals or <a href="/facts/Serial_digital_interface/T9VlXM56">serial digital interface</a> (SDI) signals; in these applications, the center conductor is ordinarily solid copper, the shielding is much heavier (typically <a href="/facts/Aluminum/7wmR8jYE">aluminum</a> foil, and 95% <a href="/facts/Copper/I8PEE8oX">copper</a> braid), and tolerances are more tightly controlled, to improve impedance stability.
</p><p>Cables typically have <a href="/facts/RF_connector/5ApBJz1Q">connectors</a> at each end.
</p>
<h2 id="types">Types</h2>
<p>Like most cables, RG-6-style cables are available in several different types designed for various applications, including:
</p><p><i>Plain</i> or <i>house</i> wire is designed for indoor or external house wiring.
</p><p>"Flooded" cable is infused with water blocking gel for use in underground conduit or direct burial.
</p><p><i>Messenger</i> or <i>aerial</i> may contain some waterproofing but is distinguished by the addition of a steel <a href="/facts/Messenger_wire/bfrXA9Em">messenger wire</a> along its length to carry the tension involved in an aerial <a href="/facts/Drop_(telecommunication)/1VgVnCXX">drop</a> from a utility pole.
</p><p><i><a href="/facts/Plenum_cable/5SKU9cve">Plenum</a></i> wire comes with a Low Smoke Zero Halogen (LSZH) jacket that burns but does not produce toxic smoke. LSZH is typically irradiated PVC. Heating drives off volatiles that leaves the resulting product more heat resistant.
</p>
<h2 id="attenuationsignal-loss">Attenuation/signal loss</h2>
<p>Cables attenuate a signal in direct proportion to length.  Attenuation increases with frequency due to <a href="/facts/Skin_effect/7TU0huYR">skin effect</a>. 
</p>
RG-6 attenuation/signal loss<table><tbody><tr><th>Frequency (MHz)</th><th>Attenuation (dB/100 ft)</th></tr><tr><td>1</td><td>0.2; 0.4 for CCS</td></tr><tr><td>10</td><td>0.6</td></tr><tr><td>100</td><td>2.0</td></tr><tr><td>1,000</td><td>6.2</td></tr></tbody></table>

<h2 id="external-links">External links</h2>
<ul><li><a href="http://lists.contesting.com/_towertalk/1999-06/msg00184.html">COAX History</a></li>
<li><a href="http://www.bluejeanscable.com/articles/rg6.htm">What Does "RG-6" Mean?</a></li></ul>

<h2 id="references">References</h2>

<ol>
<li id="fn:1"><p>'Mike Meyers' CompTIA Network+ Certification Passport', by Glen E. Clark, edited by Christopher A. Crayton, McGraw-Hill, 3rd Edition, 2009, page 32.  "Specific coax types were developed for the Ethernet standard, but a number of radio cables have very similar characteristics, and these so-called radio-grade (RG) cables also became associated with Ethernet." <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li>
</ol>

RG-6 open-in-new

RG-6