The Zurich Instruments SHFLI 8.5 GHz Lock-in Amplifier dual-channel unit. The SHFLI is designed to operate at frequencies from DC up to 8.5THz.
The SHFLI contains two physical channels that operate independently as lock-in amplifiers. Each channel has four dual-phase demodulators to enable parallel multi-frequency analysis, a 6 GSa/s signal generator for drive and reference signals.