[opendtv] Re: Analog v Digital TV
- From: "Allen Le Roy Limberg" <allimberg@xxxxxxxxxxxx>
- To: <opendtv@xxxxxxxxxxxxx>
- Date: Mon, 15 Jan 2007 18:36:14 -0500
Front end overload, possibly by nearby channels. This is owing to the AGC
design of the receiver, not something to do with the ATSC modulation scheme.
Al
----- Original Message -----
From: Barry Brown
To: opendtv@xxxxxxxxxxxxx
Sent: Monday, January 15, 2007 11:53 AM
Subject: [opendtv] Re: Analog v Digital TV
On Jan 15, 2007, at 8:57 AM, Craig Birkmaier wrote:
Anything downstream in an ATSC transmission is error protection with the
sole purpose of trying to get the data in the files I described above to the
decoder in the receiver with the lowest number of errors possible. IF you can
receive the ATSC transmitted bits perfectly, you can reconstruct the MPEG video
stream at the same level of accuracy, as a decoder that is connected to the
output of the encoder ( i.e. NO CHANNEL ERRORS).
What ATSC signal conditions, other than multi-path errors, would cause some
receivers to give an intermittent "Loss of Signal" indication (might be loss
of sync) where inserting 21 dB of attenuation in the antenna connection
corrects the problem? One channel in my area is such a case. It is not the
strongest or weakest channel nor is there any indication of multi-path errors
on analog channels (not adjacent) either side of the problem child . In fact
one of the analogs is transmitted from the same tower as the DT channel.
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