[opendtv] Re: 5th gen receivers
- From: Doug McDonald <mcdonald@xxxxxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Sat, 22 Jan 2005 17:14:52 -0600
Bob Miller wrote:
>
> And you are complaining about power levels? You need more power than
> they do in the UK where COFDM is used?
**I** am not complaining ... people halfway or 5/8 way between
here and Chicago are. At 11 miles, 1 kW is just fine, completely
fine, for indoor recption. At 50 miles it is hopeless.
> I thought that COFDM needed more
> power.
It does.
> We should LOWER the power levels in the US with 8-VSB to the
> average power level in the UK or ONE kW.
And then nobody in the fringe could ge reception.
> And they report perfect reception from 200 Watt transmitters at 30
> miles.
With indoor simple antennas? **at 25 mB/sec in their 8 MHz cxhannels? I
think not. I had no trouble getting one of our stations 16 miles
away with 1 kW and a 180 foot tower. 200 watts at 30 miles will be
fine with a good antenna outdoors and a transmitter tower high
enough to be above the horizon. And note .... if 200 watts works
with COFDM, 100 watts will work with 8-VSB. You simply can't get
aroound this ... COFDM at the same bitrate per Hz takes twice the power.
Doug McDonald
----------------------------------------------------------------------
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:
