Log in
Register
Menu
Log in
Register
Home
What's new
Latest activity
Authors
Forums
New posts
Search forums
What's new
New posts
Latest activity
Members
Current visitors
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
Determing the quality of co-axial cable
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="spiney" data-source="post: 178312" data-attributes="member: 192438"><p>Sat systems need "sat grade" coax between lnb and receiver. This is specially designed to have low attenuation in the "sat if" band, 1-2Ghz. Standard UHF only tv cable won't work at these frequencies, the signal only "travels" a few feet!</p><p></p><p>Most sat cable is "distinguishable" by a solid (metal foil) outer conductor, outside the outer conductor wire braid, UHF only cable rarely has this. Also, many sat cables have air spaced dielectric, ie holes running through the polythene inner insulation. However, this is getting rarer, since sat cable is now often waterproofed by using a "foam" inner insulator, which looks just like UHF cable, so the foil is the best way to tell.</p><p></p><p>Only way to be certain which is either the type number - printed on the outside - or test it by actually using!</p><p></p><p>Standard sat cable is ct100 "grade", with attenuation of 28dB/100m at 1.7 Ghz. Lower loss types are available, eg ct125, ct165, etc, and special types for underground burial, fire resistance, etc.</p><p></p><p><a href="http://www.cavel.it/html/e_manuale_1.htm#top" target="_blank">www.cavel.it/html/e_manuale_1.htm#top</a> .</p><p></p><p>These are similar to ct types, "dg100" is "ct100":</p><p></p><p><a href="http://www.cavel.it/html/e_digitale_x.htm" target="_blank">http://www.cavel.it/html/e_digitale_x.htm</a> .</p></blockquote><p></p>
[QUOTE="spiney, post: 178312, member: 192438"] Sat systems need "sat grade" coax between lnb and receiver. This is specially designed to have low attenuation in the "sat if" band, 1-2Ghz. Standard UHF only tv cable won't work at these frequencies, the signal only "travels" a few feet! Most sat cable is "distinguishable" by a solid (metal foil) outer conductor, outside the outer conductor wire braid, UHF only cable rarely has this. Also, many sat cables have air spaced dielectric, ie holes running through the polythene inner insulation. However, this is getting rarer, since sat cable is now often waterproofed by using a "foam" inner insulator, which looks just like UHF cable, so the foil is the best way to tell. Only way to be certain which is either the type number - printed on the outside - or test it by actually using! Standard sat cable is ct100 "grade", with attenuation of 28dB/100m at 1.7 Ghz. Lower loss types are available, eg ct125, ct165, etc, and special types for underground burial, fire resistance, etc. [URL="http://www.cavel.it/html/e_manuale_1.htm#top"]www.cavel.it/html/e_manuale_1.htm#top[/URL] . These are similar to ct types, "dg100" is "ct100": [URL="http://www.cavel.it/html/e_digitale_x.htm"]http://www.cavel.it/html/e_digitale_x.htm[/URL] . [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
Determing the quality of co-axial cable
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
Accept
Learn more…
Top