[mythtv-users] DVB technical issues about scan

[James Linder]

> On 31 Dec 2016, at 8:00 pm, mythtv-users-request at mythtv.org wrote:
> 
> Hi
> when I scan I get duplicates (and conflicts)
> 
> As I understand
> 
> Each station has its own frequency (where ever the transmitter is)
> Packet 1234 as an echo is indishingable from packet 1234 from another transmitter.
> Either the CRC is correct and the packet is used or it is wrong and myth or the card does something (maybe wait to see if there is a good packet, maybe uses it broken whatever)
> 
> Googling gives bugs and reasons for conflicting channels
> 
> As I understand deleting all the conflicts is the correct behaviour as each channel receives all the packets so signal strength is not an issue. As I see channel 7 - freq n mux 1 and channel 7 freq n (from far away) mux 2 is the only case where one ?7? is better than another ?7?. Does such a thing ever happen?
> 
> Can I delete all conflicts?

Short Answer: No you can’t just delete conflicts

Long Answer:
I’m in perth - flat ground for 50 km, minor escapement then more flat ground.
In Aus all stations use the same frequency for every site.
The receiver *must* do magic to ensure packets are from the correct site *not* (maybe it can’t) that the best packet is used (or a good vs bad packet)

By scanning and renumbering conflicts it is clear that some are good (same channel) and some are bad. The good is always good, the bad are never good.

The conflicts must come from ‘over the hills towns’ (say 100 Km away) and quality is not-good to aweful.

I’m wiser and thanks for the answers

James