Lock-in amplifier from Zurich Instruments has signal bandwidth of 500 kHz

The MFLI lock-in amplifier for the low- and medium-frequency range has a signal bandwidth of 500 kHz, with the option to extend it up to 5 MHz. It has low-frequency input noise of around 3 nV/√Hz, allowing it to capture small signals quickly in optical experiments with a mechanical chopper or pulsed laser system.
Zurich Instruments
Zurich, Switzerland
www.zhinst.com/products/mfli