The MK-1 is a standard LNBF and uses a LO of 10750 the universal LNBF uses a different dual LO of 9750-10600. You need to change the LNB settings in the receiver menu when you change the LNB type. Since the Universal LNB has a built in 22khz switch the 22khz setting will be auto or greyed out in the LNB menu when you set the LO to 9750-10600.