Ah
THAT explains a lot.
I have run it many, many times but seldom (if ever) see any real difference with or without it. It has been bugging me for a long time & you just cleared the "fog" away.
I have noticed over the years that almost all other TV programs do a much faster Channel scan than MC & they seem to seldom have any problems picking up all the channels.
There has been a few times when running it the scan would freeze part way through but would not freeze when scanning without it. I don't think it is anything you need to look at as it seems to be a very seldom used command & the freeze is even less seldom encountered.
Thanks Yaobing.