Stanford SR2124 200kHz Analog Lock-In Amplifiers

Recognising that one size shouldn't have it all, SRS is proud to introduce the SR2124 Dual-Phase Lock-In Amplifiers. Inspired by the best of an earlier generation's lock-ins, but availing itself of today's low-noise components and design methodologies, the SR2124 are a tour-de-force in low-noise, high-performance analog instrumentation.

Features:

• Low noise, all analog design
• No digital interference
• 0.2 Hz to 200 kHz measurement range
• Low noise current and voltage inputs
• Harmonic detection (f, 2f, or 3f)
• Selectable input filtering

The SR124/SR2124 design follows two basic themes. First, the signal path is entirely built from low-noise analog electronics: the best JFETs, transistors, op-amps, and discrete components. Second, configuration control is managed by a microcontroller whose system clock only oscillates during the brief moments needed to change gains or filter settings. This "clock-stopping" architecture, first introduced by Stanford in the SR560 voltage preamplifier, eliminates the inconvenience and reliability issues associated with mechanical panel controls, and makes full remote operation of these lock-ins possible.