| Frequency range |
0.001Hz to 500 kHz |
| Dynamic reserve |
120 dB (typ) |
| Voltage inputs |
Single-ended or differential |
| Sensitivity (output scale) |
1 nV to 1V (voltage input)
1 fA to 1µA (current input) |
| Voltage input range |
10mV to 1V (peak) |
| Current input range |
1µA or 10 nA (peak) |
| Max input |
1V (peak) or 1µA (peak) |
| Input impedance |
Voltage input: 10MΩ+25 pF, AC or DC coupled
Current input: 1 kΩ or 100Ω to virtual ground |
| Gain accuracy |
±1% (<200 kHz)
Signal amplitude must be less than 30% of input range |
| Noise (rms): |
2.5 nV/√Hz at 1 kHz
(10 mV input range, typ.) |
| CMRR |
90 dB to 1 kHz (DC coupled, 10 mV to 100 mV input range) |
| Dynamic reserve |
120 dB (typ) |
| Timebase |
10MHz In/Out (phase locks the internal frequency to other SR860s) |
| Input impedance |
1MΩ or 50Ω |
| Phase setting resolution |
360/232 degrees |
| Phase noise |
Int. ref: <0.0001° rms at 1 kHz (100ms, 12 dB/oct)
Ext. ref (typ): <0.001° rms at 1 kHz (100ms, 12 dB/oct) |
| Phase drift (typ) |
<0.002°/°C below 20 kHz (DC coupled)
<0.02°/°C below 200 kHz
<0.2°/°C below 2MHz |
| DC stability |
Digital output values have no drift |
| Time constants |
1µs to 30k s |
| Low pass filters |
Typical RC-type filters or advanced Gaussian/Phase-Linear filters |