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AT9 installation question.
Posted 01 September 2006 - 09:10 AM
This may seem like a stupid question, but the install video on SS says to put all four cables on the LNB before alignment and never touch them again. I was thinking of making four short cables that would just stick out the back a foot or two and then use barrel connectors to hook the runs that will lead into the house.. Is this going to be a problem?
What is the loss of barrel connecter?
Posted 01 September 2006 - 09:34 AM
Posted 01 September 2006 - 11:45 AM
Get yourself some compression connectors and a compression tool along with a coax cable stripper. You'll be glad you did. Use Coax Seal on all exposed connectors to keep out moisture and prevent corrosion.
Posted 01 September 2006 - 10:14 PM
Posted 02 September 2006 - 06:56 AM
Posted 02 September 2006 - 07:03 AM
Typically, you'll see about a 1/2-dB drop with every coaxial connection you add to the signal path.
For properly installed connectors (correct connector, correctly prepared cable end & correct crimp ....compression preferred....) the loss will be closer to 0.1 db (1/10th). Ordinarily an insignificant amount, but again assuming good craftsmanship and the right tools.
If you ever have the opportunity to see a 1 Ghz "sweep" of a length of coaxial cable using a time-domain reflectometer (TDR), depending upon the sensitivity of the instrument you may be able to see the effect of a splice if you look close. However, even more enlightening is to see the long-term effect of a very tight bend (i.e., a knot tied in the cable), see the immediate effect (almost negligible) but then look again after an hour or two of it sitting in a blazing hot attic. Equally impressive is to see the effect (again after an hour or so) of the effect of the cable being stapled to a 2x4 stud with an Arrow T-25 staple gun (or any fastening method) that impinges upon the integrity of the circumference of the cable. The TDR will make believers out of the many doubting Thomas' in this group.
Posted 02 September 2006 - 08:41 AM
Use barrel connectors with blue plastic centers not "WHITE".
Blue. What's the difference in specifications between blue and white?
As far as getting the antenna hooked up.. I dont even have an H20 yet or an HDTV.. So I guess by the time I get around to getting those I'll have to go back up on the roof and tweek things a little.