What type of LTR system are you trying to hear?
If its a Regular LTR System then you just need to program it in LCN order and have fun,...
If its an LTR Multinet, then you can only program it conventionally and try the manual flip flop method to hear it,...
If its an LTR Passport System then again, program it in conventionally, with NO DELAY on the repeaters, and scan it conventionally.