Frequency Range: DC to 1800 MHz Insertion loss: < 0.75 dB Reflects signals up to 10 watts average power and 100 watts peak powerThe Keysight 11867A RF limiter can be used to protect the input circuits of spectrum analyzers, counters, amplifiers, and other instruments from high power levels with minimal effect on measurement performance. This limiter (dc to 1800 MHz) reflects signals up to 10 watts average power and 100 watts peak power. Insertion loss is less than 0.75 dB.