Reactel part number 6R7-1575.42-X15N11 is a highly selective cavity notch filter. This unit is centered at the GPS frequency of 1575.42 MHz and has nominal a 3 dB bandwidth of 15 MHz. The notch depth is greater than 70 dB at CF +/- 1 MHz, and has a insertion loss measuring less than 1.25 dB.