DTV issues

[Garrett Wollman]

<<On Sat, 6 Dec 2008 09:01:54 -0500, "Mark Casey" <map@mapinternet.com> said:

> Class Power Limits--DTV power limits are 20% of Analog.

No.

DTV power and analog power are two completely different beasts.  DTV
power is average power (I think RMS but I'm not sure).  Analog power
is peak power.  The peak-to-average ratio of analog TV is significant
(I believe it's about 5:1).

The DTV power limits are as follows:

channels	zones		ERP	HAAT	digital:analog ratio
2-6		I		10 kW	305 m	1:10
2-6		II & III	45 kW	305 m	9:20
7-13		I		30 kW	305 m	1:10
7-13		II & III	160 kW	305 m	1:2
14-52		all		1000 kW	365 m	1:5

The analog limits are:

channels	zones		ERPmax	HAAT
2-6		I		100 kW	305 m
				100 W	2435 m
2-6		II & III	100 kW	610 m
				10 kW	2348 m
7-13		I		316 kW	305 m
				396 W	2272 m
7-13		II & III	316 kW	610 m
				31.6 kW	2348 m
14-69		all		5012 kW	610 m
				501 kW	2348 m

Most of New England is in zone I.

In the past month, the FCC has approved two allocations changes in the
northern Rockies: *6 in Casper, Wyo., moved to *8, and 10 in Glendive,
Mont., moved to 5.

-GAWollman