On 7/25/2012 9:23 PM, Jim Brown wrote:
> On 7/25/2012 1:15 PM, Steve Jones wrote:
>> Do I need a separate CAT 5 cable for each antenna's Remote Driver, or can a
>> single CAT 5's four pairs handle two SteppIR antennas?
>
> CAT5 is great cable, and has great noise (and RF) immunity if you use a
> pair for each signalling (or control) circuit, BUT it's pretty small
> gauge,
And solid so it's pretty fragile.
73
Roger (K8RI)
so the loop resistance can be high. Study what SteppIR says
> about the loop resistance of that control line and do the Ohm's Law
> arithmetic. If they define resistance by a certain length of a given
> wire gauge, you can make use of the fact that three wire gauges is half
> (or double) the resistance.
>
> Another trick -- if you use a pair per circuit and tie all the returns
> together on both ends, they're all in parallel, which for a lot of
> circuits is equivalent to cutting the loop resistance nearly in half.
>
> 73, Jim K9YC
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|