[mythtv-users] Artifacts

[John]

On 23/12/2018 03:02, James Linder wrote:
> Hi
> because some of our channels have been playing games with their names I dropped all channels and rescanned.
>
> All good EXCEPT many channels, specially HD channels, are plagued with artifacts and chirps and squeeks typical of poor signal quality.
> I checked frequency in sql table channelscan_dtv_multiplex and they are identical.
> I restored old db with mythconverg_restore.pl and problem is totally gone.
>
> What can I say or not say to the db that will affect tuning. The stations are correct just apparant signal strength is bad.
>
> I stress NO hardware or software changes or conections are changed in any way ONLY mythconverg DB changes.
> Whatcould be happening?
>
> James
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Was the old table created with the same tuner - its possible that a 
field set previously to auto might need a parameter. The easiest check 
is compare all the old and new tuning parameters.