SR446 - RF Preamplifier

3.3 nV/√Hz input noise (@1 MHz) Voltage gain to from ×1 to ×100 50 Ω input and output impedance USB computer interface DC to 400 MHz bandwidth 0.3 dB gain flatness SR446 400 MHz Preamplifier The SR446 is a single-channel, 400 MHz bandwidth voltage preamplifier with 21 programmable gains from ×1 to ×100 (+0 dB to +40 dB with 2 dB steps). It also includes four programmable low-pass filters , with settings of full bandwidth, 200 MHz, 100 MHz and 20 MHz. There are two output channels which offer complimentary outputs (inverting and non-inverting) that can be used separately, or together as a differential output. Signal Recovery with PMTs SR446 Mechanical Dwg 3D Step File SR445a Quad Preamp SR844 RF Lock-In SR250 Gated Integrator SR400 Photon Counter Signal Recovery — PMTs SR446 Mechanical Dwg 3D Step File SR445a Quad Preamp SR844 RF Lock-In SR250 Boxcar SR400 Photon Counter The front panel displays all the setup and the state of the instrument. Users can perform all the configurations from the front panel or remotely through the USB interface (in serial port emulation). SR446 Specifications Input configurations 50 Ω, 500 Ω, AC or DC coupling, ground Max input: ±0.5 V Max output: ±0.65 V, or ±1.3 V differential DC to 400 MHz (-3 dB) Full BW, 200 MHz, 100 MHz, 20 MHz 1 to 100 (0 dB to 40 dB with 2 dB steps) 0.3 dB (DC to 100 MHz) 3.3 nV/√Hz @1 MHz (at max gain) 20 ns (typ.) between +Out and -Out Overload recovery time Output overload detect ±0.7 V (typ.) into 50 Ω load Operating temperature 0 °C to 40 °C, non-condensing 8.3" × 1.5" × 8.0" (WHL) 5 W, 100 to 240 VAC, 50/60 Hz One year parts and labor on defects in materials and workmanship