Sell Test Equipment

SR445 Stanford Research Preamplifier

The SR445 is a 300 MHz Preamplifier from Stanford Research. An amplifier is a type of electronic test equipment that amplifies radiofrequency (RF) and microwave signals using the antenna. Amplifiers are ideal when used for electromagnetic interference (EMI) testing, cell phones, microwaves, radio communications, and other such applications.

 Additional Features:

  • Bandwidth: DC to 300 MHz (-3 dB)
  • Inputs: 50Ohm impedance, DC coupled, BNC connectors (channel 1 selectable 50 or 500 Ohm)
  • Outputs: DC coupled, BNC connectors (terminate into 50Ohm)
  • Rise/Fall Time: 1.2 ns
  • Recovery Time: <4 ns for a times 20 overload
  • Propagation Delay: 2.2ns
  • Power: 16W, 100/120/220/240 VAC, 50/60 Hz

The Standford Research SR445 Fast Preamp contains four wide bandwidth, DC coupled amplifiers designed to be used independently or cascaded to provide gains of 5, 25, and 125. The fast rise time, low noise, and DC accuracy of the SR445 make it the ideal instument for amplifying outputs of fast photomultiplier tubes and photodiodes.

The SR445 is useful for amplifying small signals to levels that allow processing by other instruments such as the SR430 or the SR400. The four channels may be used independently or cascaded.

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