Stanford Research
Stanford Research SR844
200MHz - 25.00 KHz Lock in Amplifier
25 kHz to 200 MHz Frequency Range
3 nV/√Hz input noise at full bandwidth Minimum Detectable Signal
Greater than 78 dB Dynamic Reserve
1 nV to 1 V (in a 1-2-5 sequence) Full Scale Sensitivity
1st and 2nd harmonic detection capability Harmonic Detection
| Attribute | Value |
|---|---|
| Frequency Range | 25 kHz to 200 MHz |
| Minimum Detectable Signal | 3 nV/√Hz input noise at full bandwidth |
| Dynamic Reserve | Greater than 78 dB |
| Full Scale Sensitivity | 1 nV to 1 V (in a 1-2-5 sequence) |
| Harmonic Detection | 1st and 2nd harmonic detection capability |
| Time Constants | 100 µs to 30 ks (in a 1-3-10 sequence) |
| Output Interfaces | RS-232 and GPIB (IEEE-488) standard interfaces |
| Reference Input | Internal oscillator or external reference, 25 kHz to 200 MHz |
| Signal Input Impedance | 50 Ω |
| Display | Dual channel display with simultaneous R, θ, X, and Y readout |
| Model | SR844 |
|---|
The Stanford Research Systems SR844 is a 200.00 MHz - 2 nV/vHz (typ.), <8 nV/vHz (max.) , 25.00 KHz Lock in Amplifier
