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

[Cowboy]

On Monday 09 April 2007 02:19 am, 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.

 Since you qualify it as "emergency operation" it may fall under the emergency
 operation rules, though there are none for HD/IBOC.

> 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?

 Clearly, for non-emergency operation the digital power must be reduced
 to maintain the mask, but, if the operation is declared and justified
 as emergency operation, and there are no rules for what you ask
 specificly, it's a good question !
 Reasonable and prudent men would allow the full power HD level, but the
 Commission is full of lawyers, who are not known to be reasonable,
 nor prudent.
 My suspicion is that there won't be an answer until after there is a test case.

> Second question: What would happen at the analog and digital receiver 
> locations with regard to reception, when I lose the 13 kW analog-only transmitt
> er and 
> the  analog + HD (4 kW analog 170 Watts HD) transmitter remains on the air? 
> (we will ignore the losses in the HD/Analog RF combiner for the sake of 
> simplicity)

 Probably nothing !
 Maybe the HD coverage would improve slightly, and the analog obviously
 worsen, but I doubt it.

-- 
Cowboy