[opendtv] Re: DVB Receiver Standard
- From: Doug McDonald <mcdonald@xxxxxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Fri, 09 Dec 2005 14:14:40 -0600
Dale Kelly wrote:
>
> The DVB standards requirements the are not "goals". The document states
> that receivers "shall" meet certain requirements to qualify as DVB-T
> receivers. One very important performance specification unaddressed by the
> ATSC
> document is that of receiver noise figure. Industry sources have stated that
> the typical ATSC receiver, using the cable ready configuration (the vast
> majority of receivers sold), has a noise figure of 12 to 14 DB
Those are abysmal numbers. Are they different using the
"OTA" configuration?
I am using preamps, but at a NF of 14 dB and a 100 foot cable
length they will clearly be worse than borderline. I use
two different preamps, one kind has a 10 dB gain and a 5
dB NF, the other a 16 dB gain and a 0.5 dB NF. Neither
would not even really be optimally high gain in the absence of
the loss from the 100 feet or so of cable.
Doug McDonald
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