I'm using LCN here as a unique number for each frequency (RF channel) used.Calculations would be based on RF channels, not DSD+ LSNs. Step size would be 12.5 kHz (RF channels are 12.5 kHz apart)
Some scanners don't trunk track DMR, so they need no LCNs, just frequencies.
So do the trunking scanners show the LCN even though they don't know the frequency?
I'm making the assumption of course if the base frequency method is used that a trunking scanner uses a base frequency and LCN and Frequency Separation [or step size] (these value are used 12.5 khz, 25 khz) to calculate the frequency of the LCN.