The F-120-7 is used primarily in low frequency susceptibility testing of signal or power circuits up to 63 mm in diameter. The useable frequency range is 10 KHz to 150 MHz with a typical insertion loss of 15 dB from 400 KHz to 110 MHz. The VSWR is less than 4:1 from 200 KHz to 50 MHz. The input power rating is 125 watts CW for a duration of 30 minutes.