SR445A - Preamplifier
Stanford Research Systems - SRS
350 MHz Preamplifier: The Model SR445A 350 MHz Preamplifier contains four wide-bandwidth, DC-coupled amplifiers, each with a gain of 5. The four channels may be used independently, or cascaded to provide a total gain of up to 625.
The fast rise time, low noise, and excellent DC accuracy of the SR445A make it an ideal instrument for amplifying the outputs of fast photomultiplier tubes and photodiodes.
- 4 independent channels
- DC to 350 MHz bandwidth
- 1 ns rise/fall time
- 6.4 nV/√Hz input noise
- Voltage gain to 625
- 50 Ω input and output impedance
- 3 ns overload recovery
- Excellent phase linearity
SR510 & SR530 - Lock-in Amplifiers
Stanford Research Systems - SRS
SR530 Dual Phase Lock-In Amplifier: The SR510 and SR530 are analog lock-in amplifiers which can measure AC signals as small as nanovolts in the presence of much larger noise levels.
Both the single phase SR510 and the dual phase SR530 have low-noise voltage and current inputs, high dynamic reserve, two stages of time constants, and an internal oscillator. In addition, both lock-ins come equipped with a variety of features designed to make them simple to use.
- 0.5 Hz to 100 kHz frequency range
- Current and voltage inputs
- Up to 80 dB dynamic reserve
- Tracking band-pass and line filters
- Internal reference oscillator
- Four ADC inputs, two DAC outputs
- GPIB and RS-232 interfaces
SR560 - Preamplifier
Stanford Research Systems - SRS
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
SR554 - Preamplifier
Stanford Research Systems - SRS
Transformer Preamplifier: The SR554 is a low-noise, transformer-coupled preamplifier optimized for source impedances between 0.05 Ωand 1 kΩ. With an input noise of only 0.1 nV/√Hz, the SR554 can be used in a wide range of low-noise
It is the ideal preamplifier for low-temperature synchronous detection applications where isolation between the experimental sample and the lock-in amplifier is critical.
- Transformer-coupled input
- 0.1 nV/√Hz input noise
- 0.1 Hz to 40 kHz bandwidth
- Gain of 100 or 500
- Single-ended and differential inputs
- >40 dB isolation from DC to 500 MHz
- Powered by SRS lock-in amplifiers
SR570 - Preamplifier
Stanford Research Systems - SRS
Low-Noise Current: The SR570 is a low-noise current preamplifier capable of current gains as large as 1 pA/V.
High gain and bandwidth, low noise, and many convenient features make the SR570 ideal for a variety of photonic, low temperature and other measurements.
- 5 fA/√Hz input noise
- 1 MHz maximum bandwidth
- 1 pA/V maximum gain
- Adjustable bias voltage
- Two configurable signal filters
- Variable input offset current
- Line or battery operation
- RS-232 interface
SR810 & SR830 Digital Lock-in Amplifier
Stanford Research Systems - SRS
SR830 DSP Dual Phase Lock-In Amplifier: The SR810 Lock-In Amplifier and SR830 Lock-In Amplifier provide high performance at a reasonable cost.
The SR830 simultaneously displays the magnitude and phase of a signal, while the SR810 displays magnitude only. Both instruments use digital signal processing (DSP) to replace the demodulators, output filters, and amplifiers found in conventional lock-ins.
- 1 mHz to 102.4 kHz frequency range
- >100 dB dynamic reserve
- 5 ppm/°C stability
- 0.01 degree phase resolution
- Time constants from 10 µs to 30 ks
- Auto-gain, -phase, -reserve and -offset
- Synthesized reference source
- GPIB and RS-232 interfaces
SR844 - Lock-in RF Amplifier 200MHz
Stanford Research Systems - SRS
200 MHz RF Lock-In Amplifier: The SR844 is the widest bandwidth lock-in amplifier available.
It provides uncompromised performance with a frequency range of 25 kHz to 200 MHz and up to 80 dB of drift-free dynamic reserve.
- 25 kHz to 200 MHz frequency range
- 80 dB dynamic reserve
- Time constants from 100 µs to 30 ks (6, 12, 18 or 24 dB/oct rolloff)
- "No Time Constant" mode (10 to 20 µs update rate)
- Auto-gain, -phase, -reserve and -offset
- Internal or external reference
- Two 16-bit DACs and ADCs
- GPIB and RS-232 interfaces
SR850 - Digital Lock-in Amplifier
Stanford Research Systems - SRS
DSP Dual Phase Lock-In Amplifier: The SR850 is a digital lock-in amplifier based on an innovative DSP (Digital Signal Processing) architecture.
The SR850 boasts a number of significant performance advantages over traditional lock-in amplifiers-higher dynamic reserve, lower drift, lower distortion, and dramatically higher phase resolution.
- 1 mHz to 102.4 kHz frequency range
- >100 dB dynamic reserve
- 0.001 degree phase resolution
- Time constants from 10 µs to 30 ks (up to 24 dB/oct rolloff)
- Auto-gain, -phase, -reserve and -offset
- Data logging (up to 65k samples)
- Smoothing, curve fitting & statistics
- GPIB, RS-232 and 3.5" disk drive
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