The MH648A is a 100 kHz-1200 MHz pre-amplifier for improving sensitivity in instruments such as spectrum analyzers, field strength meters, and frequency counters. Frequency range 0.1 to 1200 MHz Gain 30 dB ±1 dB (0.5 to 800 MHz), 30 dB +1.5/–6 dB (0.1 to 1200 MHz) Gain stability ±1.5 dB (0.1 to 800 MHz), ±3 dB (800 to 1200 MHz) Noise figure =6 dB (0.5 to 800 MHz), =8 dB (0.1 to 1200 MHz)