The Stanford Research Systems SR560 is a high-performance, low-noise voltage preamplifier designed for conditioning weak electrical signals from DC up to 1 MHz. Power cord and operating manual are included.

 Key Specifications & Features

• Bandwidth: DC to 1 MHz
• Input Noise: <4 nV/√Hz at 1 kHz
• Gain: Selectable from 1 to 50,000 in a 1-2-5 sequence with a 0.5% vernier/percentage adjustment
• Inputs: Differential and single-ended inputs with 100 MΩ impedance (25 pF), protected up to 40–100 VDC, using fully floating BNC connectors to prevent ground loops
• Outputs: 50 Ω and 600 Ω BNC outputs capable of driving up to 10 Vpp, plus rear-panel ± 12 VDC power supply outputs (200 mA)
• Filters: Two first-order RC filters (high-pass, low-pass, or band-pass) with cutoffs settable from 0.03 Hz to 1 MHz
• Gain Allocation Modes:
• Low Noise mode places gain before the filters to maximize signal-to-noise ratio.
• High Dynamic Reserve mode places gain after the filters to prevent signal overloading.
• Power Supply: Operates on standard AC line power or built-in rechargeable sealed lead-acid batteries (providing up to 15 hours of operation) Note:  The internal batteries in this unit need to be replaced if battery operation is desired. Replacements are available from SRS or from electronics distributors.
• Control & Noise Reduction: Features an opto-isolated RS-232 interface and a sleep-mode microprocessor that shuts down its clock oscillator during normal operation to eliminate digital noise. A TTL blanking input is also available to zero the gain externally.