If you want to add two ranges such as two antenna ranges together you can use the max(x,y) equation. This is typically used to find the highest level of two similar ranges. However, it is not restricted to similar ranges, therefor you can add dis-similar ranges. If there is a frequency overlap or duplicate, it will return the highest amplitude of the two.
Example:
To add a log periodic range to a bicon range you would do max(bicon,log).
This is easier than storing the files, then transferring them back with the ‘append’ feature.
Joe Tannehill