[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
 Reporter:  f.lange at hccnet.nl  |        Owner:  stuarta
     Type:  defect             |       Status:  new    
 Priority:  minor              |    Milestone:  0.20   
Component:  dvb                |      Version:  head   
 Severity:  low                |   Resolution:         
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!

Ticket URL: <http://svn.mythtv.org/trac/ticket/1485>
MythTV <http://www.mythtv.org/>

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