[BC] Air-Dielectric Sections
Mike McCarthy
Towers
Fri Mar 9 19:33:57 CST 2007
In today's age of absolute phase rotation presented to the transmitter
being important for best broadband operation, treat the cable as you would
in a DA and factor it in the design of the whole plant....DA or N-DA.
MM
At 08:14 AM 3/9/2007 -0600, Gary Glaenzer wrote
>Andrew;
>
>If it's a non-DA, there will be no 'phasor' as such, just an ATU at the
>antenna end.
>
>So 'velocity factor' would not be a problem; even if it was different from
>3" to 4", which I'm not sure it would be.
>
>I'd bury it deeper than 3', unless you are in the South, and pulling 3"
>Heliax thru 6" conduit over 750 feet will be a cast-iron SOB.
>
>The advice on fiber duct has been educational, and I'd look into it if I
>were you.
>
>Gary
More information about the Broadcast
mailing list