1.8 , 2.0 3.5 , 4.0 7.0 , 7.32 10.099 , 10.151 14.0 , 14.35 18.06 , 18.17 21.0 , 21.450 24.89 , 24.99 28.0 , 30.0 50.0 , 54.0 139.9 , 148.1 The above frequency ranges are used by Win-EQF to determine what BCD data lines on the printer port are turned on (set HIGH). Edit this file using any ASCII text editor to customize Win-EQF for your installation. Each line of the file, for lines 1 through 11, represents the frequency range that will turn on one of the data lines at the parallel port. Note that there are two files, one for STATION #1 (WIN-EQF3.FRQ) and the other for STATION #2 (WIN-EQF4.FRQ). This allows you to have two antenna switches customized for two stations.