Hi, I've just installed the 160m modul and reading at pg. 9 point 3 " ... initiate 160m VFO Linearization ...". I think it's not necessary so I decided to ignore this point, because as far as I know CAL PLL is only necessary on 40m. Hope this is ok? 73 de Wolf, DL2WRJ K2 #2857, K1 #1136