Voltage preamplifier SR446

differentialsingle-channelprogrammable gain

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. 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). DC to 400 MHz bandwidth (all gain settings) Differential output 0.3 dB gain flatness 3.3 nV/√Hz input noise (@1 MHz) Voltage gain to from ×1 to ×100 50 Ω input and output impedance USB computer interface