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Product details
Product Introduction
The digital signal processing DSP lock-in amplifiers SR810 and SR830 produced by Stanford (SRS) in the United States provide you with high performance at a reasonable price. SR830 has the function of simultaneously displaying the size and phase of the signal, while SR810 only displays the size of the signal. They replace the traditional demodulator, output filter, and amplifier in directional amplification with digital signal processing technology, and have a working frequency range from 1mHz to 102kHz and dynamic storage of 100dB without drift.
main performance
- More frequency range from 1mHz to 102.4kHz
- Dynamic retention of over 100dB
- Stability is 5ppm/℃
- 0.01 degree phase resolution
- The time constant ranges from 10 μ s to 30ks (maximum 24dB octave attenuation rate)
- Equipped with automatic acquisition, automatic phase determination, and automatic storage
- Automatic compensation function
- Synthetic reference light source
- GPIB and RS-232 interfaces
SR830 lock-in amplifier technical parameters
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Voltage input |
Single-ended or differential |
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resolving power |
2 nV to 1 V |
|
Current input |
106 or 108V/A |
|
Input impedance voltage |
10 MΩ + 25 pF, AC or DC coupled |
|
Input impedance current |
1 kΩ to virtual ground |
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Gain accuracy |
±1 % (±0.2 % typ.) |
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Noise(typ.) |
6 nV/√Hz at 1 kHz; 0.13 pA/√Hz at 1 kHz (106 V/A); 0.013 pA/√Hz at 100 Hz (108 V/A) |
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Linear filtering |
50/60 Hz and 100/120 Hz (Q = 4 ) |
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CMRR |
100 dB to 10 kHz, decreasing by 6 dB/oct above 10 kHz |
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dynamic range |
>100 dB (without prefilters) |
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stability |
<5 ppm/°C |
SR830 lock-in amplifier
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frequency range |
0.001 Hz to 102.4 kHz |
|
Reference input |
TTL or sine (400 mVpp min.) |
|
Input impedance |
1 MΩ, 25 pF |
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Phase resolution |
0.01° front panel, 0.008° through computer interface |
|
Absolute phase error |
<1° |
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Relative phase error |
<0.001° |
|
Orthogonality |
90° ± 0.001° |
|
phase noise |
Internal ref. Synthesized, <0.0001° rms at 1 kHzExternal ref. 0.005° rms at 1 kHz (100 ms time constant, 12 dB/oct) |
|
Phase drift |
<0.01°/°C below 10 kHz, < 0.1°/°C above 10 kHz |
|
Harmonic detection |
2F, 3F, ... nF to 102 kHz (n < 19,999) |
|
Collection time |
(2 cycles + 5 ms) or 40 ms,whichever is larger |
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