0.0 , 2.0 2.0 , 4.0 4.0 , 7.3 7.3 , 10.0 10.1 , 10.159 10.16 , 21.450 21.450 , 24.990 28.0 , 30.0 The above frequency ranges are used by Win-EQF to determine what TTL 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 8, represents the frequency range that will turn on one of the 8 data lines at the parallel port. Note that there are two files, one for STATION #1 (WIN-EQF1.FRQ) and the other for STATION #2 (WIN-EQF2.FRQ). This allows you to have two antenna switches customized for two stations.