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The Keysight (formerly Agilent) 87405C portable preamplifier provides an exceptional gain of 25 dB up to 4 GHz and a probe-power bias connection which eliminates the need for an additional DC power supply. This amplifier provides 22 dB minimum gain block and over 8 dBm output power. * 22db-25db gain from 10MHz - 4 GHz * 8 dBm output power * 5 dB noise figure * Bias Option * Type N (m) Output to Type N (f) * DC Bias Volt/Amp: 15 V at 80 mA * Compact size, integral bias regulation