[opendtv] Re: Doug Lung on DOCRs

  • From: "Manfredi, Albert E" <albert.e.manfredi@xxxxxxxxxx>
  • To: "opendtv@xxxxxxxxxxxxx" <opendtv@xxxxxxxxxxxxx>
  • Date: Sun, 1 Aug 2010 16:59:00 -0500

John Shutt wrote:

> Of course this is in addition to the naturally occurring echoes caused
> by topology and man-made objects.

Absolutely. Which has always been one of my doubts about SFNs, from day 1. You 
are creating this very deliberate strong echo problem and layering it on top of 
what is, in some locations, already a difficult reception environment. You know 
going in that it's going to cause reception problems for some people, just like 
any readjustment of the spectrum. Like when analog went off the air.

But the Brazil ensembles do include many echoes, typically, except for Brazil E 
which is just three strong paths. Brazil D has multiple other echoes, and a 
good strong one at about 6 usec.

Bert
 
 
----------------------------------------------------------------------
You can UNSUBSCRIBE from the OpenDTV list in two ways:

- Using the UNSUBSCRIBE command in your user configuration settings at 
FreeLists.org 

- By sending a message to: opendtv-request@xxxxxxxxxxxxx with the word 
unsubscribe in the subject line.

Other related posts: