The F-120-1 is used for low frequency susceptibility testing. The useable frequency range is 10 KHz to 175 MHz with an insertion loss of less than 13 dB from I MHz to 125 MHz. The VSWR from 200 KHz to 50 MHz is typically less than 4:1. This very low input VSWR minimizes the power being reflected. The F-120-1 has an input power rating of 100 watts CW for 30 minutes.