I have jusst purchsed DM 500s, tried to set it via disec switch. My DM searched KU satellite but not C-band. I tried different techniue on net such as
1.by putting 5150/5750 on LOF
2. by using formula such as 5150-4180=970+9750=10720
on manual searching i put 10720 and s/r 26666 for Geo tv but...