Amplifier Research
999

The Amplifier Research model 999 is a
Leveling Preamplifier for an operational
bandwidth of 1 MHz....1000 MHz
for constant-field Radio Frequency Interference (RFI) susceptibility testing, power-output control, modulation envelope feedback and simulation of current or voltage sources.
The 999 employs a front-panel attenuator that permits level adjustment of RF signal input so the 999 is compatible with a wide variety of RF sources, including function and sweep generators, and frequency synthesizers.
The specified power output is 10 mW and the nominal input and output impedance is 50 ohms

Closed-loop control of RF gain:

• 25 dB minimum (1....1000 MHz)
  
• 40 dB typical (5....500 MHz)

Please find a corresponding data sheet here.