[mythtv-commits] Ticket #1485: DVB Scanning Issues
MythTV
mythtv at cvs.mythtv.org
Fri Mar 24 09:50:27 UTC 2006
#1485: DVB Scanning Issues
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Reporter: f.lange at hccnet.nl | Owner: stuarta
Type: defect | Status: new
Priority: minor | Milestone: 0.20
Component: dvb | Version: head
Severity: low | Resolution:
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Comment (by anonymous):
If I understand you correctly "Eventual goal would be to pick the best
frequency (signal/quality) and use that in the database" - you may not
have considered how these frequencies are used for dvb-t in the UK.
Presumably in order to prevent interference from different transmitters -
each transmitter uses the centre frequency OR a single frequency selected
from this list - if the other_frequency flag is set then the centre
frequency is not used on that transmitter and one of the frequency list is
used. The only case where two frequencies would be transmitting the same
transport is in regions that were in range of two transmitters.
The issue that makes scanning a pain is that the frequency list and main
frequencies for each transport may overlap - so you could test the signal
on that frequency and get a valid strong signal - but it would actually be
for a different transport - so selecting the strongest signals could
actually lose you a transport.
I tried to explain this (very longwindedly) in #841 - I haven't tried to
update that because I was waiting to understand the design of the new
signal monitoring daniel was planning for .20
- good luck!
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Ticket URL: <http://svn.mythtv.org/trac/ticket/1485>
MythTV <http://www.mythtv.org/>
MythTV
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