Showing posts with label RG6 coaxial. Show all posts
Showing posts with label RG6 coaxial. Show all posts

Monday, March 30, 2009

RG6 coaxial cable problem

Yesterday I've Decided to relocate my TV (a little feng shui, if you know what I mean), although the plan in arranging my place is going fine but I forgot to consider the length of the coaxial cable from my satellite Dish, well it is somehow short.
First, I tried using my old splitter (although i'm not splitting) just to add another length to RG6 cable to reach my receiver besides my TV but to my surprised I did get any signal, my first guess is that my splitter is in bad shape (I can't even remember when did I used it).
So to settle the annoyance I decided to buy a long RG6 coaxial cable to solve my problem, I took the new coaxial cable and attached the connectors (can't connect it with the LNB and Receiver without them). Just as I thought that everything would be normal, to my another surprised I'm getting no signal again and worst the LED or the light on the receiver is blinking (red blinking light- it is connected to a power but it is not turned on yet) and I can't turn it on.
Well I'm already in a bad mood and hungry, I don't know what could be wrong, or I know whats wrong (it is the coaxial cable of course, that's the only thing that I've replaced) but don't know how could I've done it wrong.
I ate my lunch first, then remove the coaxial cable and check it thoroughly, It seems no problem with the cable (I was looking for a stripped cover along the cable). There must have been a problem on attaching the connectors, I used my analog multimeter then check for line continuity, there's a good line continuity between end to end center wire or conductor and end to end connectors.
This where I found the problem 'cause there is a line continuity between wire conductor (one end) to the connector on the other end where there shouldn't be, in short the wire is somewhat grounded and I found out that during my attaching of connectors, some of the aluminum braid (shielding) were in touch with the center wire (hey! at least I've got it).

My guidelines in attaching a connector to an RG6 coaxial cable:
  1. Make sure that the coaxial cable has a line continuity at both ends (check it before attaching the connectors). see the picture.
  2. In stripping the coaxial cable, make sure that that the shielding are cut clean (use a sharp wire cutters).
  3. Double check the attached connectors visually (you can actually see the center wire if there is an aluminum wire touching it). To be absolutely sure check again for line continuity.

Saturday, March 28, 2009

RG6 coaxial cable


I've checked on RG6 or coaxial cable by common terms (although nowadays it is simply called coax), obviously its variety are most commonly used in cable tv (mostly familiar), you must have seen it but never bothers.

RG6 term origin is from a long forgotten military spec which means radio guide and the numbers they say are picked in random (hmmm, I guess it is used to identify other coaxial cable from one another). RG6 coaxial cables main design are cables with 18 AWG (american wire gauge) center conductor and 75 ohm characteristic impedance (pretty technical huh!).

Its physical appearance (if you keenly observe it) has a center conductor, with a shield, the dielectric keeping the two apart, and an outer jacket wrapping (from the material being used in RG6, this is where its variety differs). Its main function (as we all hope it would be doing) is to transfer video signals from one piece of equipment to another with less cable loss, In the case of a satellite TV it is from LNB to our Receiver/s.

According to expert, RG6 coaxial cable are suited for a satellite TV set up, main reason for this is the shielding design which maintains the signal levels inside the center conductor even on a long cable run and appropriate for high frequency radio signals.