I changed the subject to vs BSC 421 since I'm now able to scan more channels with the 421Add to the list :91W3820 V 30000 @ 67%4020 V 31250 @ 44%99W3810 H 3253 @ 56%4080 H 22760 @35%Seems to me that the channels that are on the edge of staying locked on the 421 are not locking when I put on the C1PLL