For example: Agilent E4440A or Anritsu 68369
Solid State Preamplifier, 100 kHz to 400 MHz
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Keysight / Agilent 8447A Overview
The Agilent 8447A is a low-noise, high gain amplifier used to improve the sensitivity of counters, spectrum analyzers, RF voltmeters, EMI meters, power meters and other devices. They will also increase the maximum power available from a signal generator or sweeper.
Features:
- Gain (mean, per channel): 20 dB at 10 MHz
- Noise figure: < 7 dB
- Output power for 1 dB
- Gain compression: > + 6 dBm