[BC] Re: Split level combine and the loss of the analog-only transmitter

[Bob Groome]

Good question: Many answers. 

An status monitor for both boxes and modern
control COULD by pass the combiner with coax
switches to maintain the correct power (adjusting
the top automatically). ERI, Bird and maybe
Coaxial Dynamics make the sensors. ERI and
Dielectric make OK coax switches. There are other
ways to skin this cat. The mid power combiner can
be a fixed injector or a switchless combiner. The
same sensors and with a good controller can
re-adjust the switchless combiner and TOP. Harris
holds the patten on the mid level combiner, but I
BELIEVE ERI or Dielectric build these devices for
them.

Bob
--- Xmitters at aol.com wrote:

> 
> I'm wondering about the FCC and theoretically
> allowed operating conditions 
> during emergency operation of a Harris
> split-level combined transmitter system.
>  
> Say your analog-only was about 13 kW and the
> analog power from the analog + HD 
> transmitter was another  4 kW or so, and the HD
> power was about 170 watts. 
> Yes, I know these numbers are not exact but
> let's use them for the sake of this
>  
> question. 
> 
> If I lose my analog-only transmitter and the
> Analog + HD transmitter 
> survives, Is the FCC going to let me run the
> allowed HD power as dictated by my
>  
> full-power RF mask, or are they going to want
> me to reduce the HD power to the 
> appropriate level consistent with the amount of
> analog power I'm putting out at
>  the 
> time?
> 


Bob Groome 
The only statistics you can trust are those you falsified yourself.                                         Winston Churchill

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