SR560 – Low-noise voltage preamplifier
The SR560 is a high-performance, low-noise preamplifier that is ideal for a wide variety of applications including low-temperature measurements, optical detection, and audio engineering.
• 4 nV/√Hz input noise
• 1 MHz bandwidth
• Variable gain from 1 to 50,000
• AC or DC coupled
• Two configurable signal filters
• Differential and single-ended inputs
• Line or battery operation
• RS-232 interface
Inputs: AC or DC coupled, single-ended or differential
Input impedance: 100 M? + 25 pF
Maximum input: 3 Vpp
CMRR: 100 dB from DC to 1 kHz (100 mVrms common mode input at 1kHz , gain=100, low noise mode. Decreases by 6 dB/octave from 1 kHz to 1 MHz)
Noise: 4 nV/?Hz at 1 kHz
Gain: 1 to 50,000 in 1-2-5 sequence. Vernier gain in 0.5 % steps.
Gain stability: 200 ppm/?C
Bandwidth: -3 dB at 1.2 MHz (typ.)
Flatness: ?0.3 dB to 300 kHz (gains up to 1000)
Signal filters: 2 configurable (low-pass or high-pass) 6 dB/oct rolloff filters. -3 dB points are settable in a 1-3-10 sequence from 0.03 Hz to 1 MHz.
Gain allocation: High Dynamic Reserve ? Gain is increased after the signal filters to prevent overloading.
Low Noise ? Gain is increased before the filters to improve noise figure.
Maximum output: 10 Vpp into 50 ? and 600 ?
Filter reset: Long time constant filters may be reset with front-panel button.
DC drift: 5 ?V/?C referred to input (DC coupled)
Distortion: 0.01 % at 1 kHz
Rear panel: ?12 VDC @ 200 mA referenced to amplifier ground
External gating: TTL input sets gain to zero
Interfaces: RS-232, 9600 baud, receive only
Power: 100/120/220/240 VAC, 6 watts charged, 30 watts while charging. Internal batteries provide 15 hours of operation between charges. Batteries are charged while connected to the line.
Dimensions: 8.3″” ? 3.5″” ? 13.0″” (WHL)
Weight: 15 lbs. (batteries installed)
Warranty: One year parts and labor on defects in materials and workmanship