Description
|
SR810 Specifications |
|
| Signal Channel | |
| Voltage inputs | Single-ended or differential |
| Sensitivity | 2 nV to 1 V |
| Current input | 106 or 108 V/A |
| Input impedance | |
| Voltage input | 10 MΩ + 25 pF, AC or DC coupled |
| Current input | 1 kΩ to virtual ground |
| Gain accuracy | ±1 % (±0.2 % typ.) |
| Noise | 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) |
| Line filters | 50/60 Hz and 100/120 Hz (Q=4) |
| CMRR | 100 dB at 10 kHz, decreasing by 6 dB/oct above 10 kHz |
| Dynamic reserve | >100 dB (without prefilters) |
| Stability | <5 ppm/°C |
| Reference Channel | |
| Frequency range | 0.001 Hz to 102.4 kHz |
| Reference input | TTL or sine (400 mVpp min.) |
| Input impedance | 1 MΩ, 25 pF |
| Phase resolution | 0.01° front panel, 0.008° through computer interfaces |
| Absolute phase error | <1° |
| Relative phase error | <0.001° |
| Orthogonality | 90° ± 0.001° |
| Phase noise | |
| Int. reference | Synthesized, <0.0001° rms at 1 kHz |
| Ext. reference | 0.005° rms at 1 kHz, 100 ms, 12 dB/oct |
| Phase drift | <0.01°/°C below 10 kHz, <0.1°/°C, 10 kHz to 100 kHz |
| Harmonic detection | 2F, 3F, … nF to 102 kHz (n < 19,999) |
| Acquisition time | (2 cycles + 5 ms) or 40 ms, whichever is greater |
| Demodulator | |
| Stability | Digital outputs and display: no drift. Analog outputs: <5 ppm/°C for all dynamic reserve settings. |
| Harmonic rejection | -90 dB |
| Time constants | 10 µs to 30 ks (6, 12, 18, 24 dB/oct rolloff). Synchronous filters available below 200 Hz. |
| Internal Oscillator | |
| Range | 1 mHz to 102 kHz |
| Accuracy | 25 ppm + 30 µHz |
| Frequency resolution | 4½ digits or 0.1 mHz, whichever is greater |
| Distortion | -80 dBc (f <10 kHz), -70 dBc (f >10 kHz) @ 1 Vrms amplitude |
| Amplitude | 0.004 to 5 Vrms into 10 kΩ (2 mV resolution), 50 Ω output impedance, 50 mA maximum current into 50 Ω |
| Amplitude accuracy | 1 % |
| Amplitude stability | 50 ppm/°C |
| Outputs | Sine, TTL (When using an external reference, both outputs are phase locked to the external reference.) |
| Displays | |
| Channel | 4½-digit LED display with 40-segment LED bar graph. X, R, X-noise, Aux 1 or Aux 2. The display can also be any of these quantities divided by Aux 1 or Aux 2. |
| Channel 2 (SR830) | 4½-digit LED display with 40-segment LED bar graph. Y, Θ, Y-noise, Aux 3 or Aux 4. The display can also be any of these quantities divided by Aux 3 or Aux 4. |
| Offset | X, Y, R can be offset up to ±105 % of full scale. |
| Expand | X, Y, R can be expanded by 10× or 100×. |
| Reference | 4½-digit LED display |
| Inputs and Outputs | |
| CH1 output | ±10 V output of X, R, X-noise, Aux 1 or Aux 2. Updated at 512 Hz. |
| CH2 output (SR830) | ±10 V output of Y, Θ, Y-noise, Aux 3 or Aux 4. Updated at 512 Hz. |
| X, Y outputs | In-phase and quadrature components |
| (rear panel) | (±10 V), updated at 256 kHz |
| Aux. A/D inputs | 4 BNC inputs, ±10 V, 1 mV resolution, sampled at 512 Hz |
| Aux. D/A outputs | 4 BNC outputs, ±10 V, 1 mV resolution |
| Sine Out | Internal oscillator analog output |
| TTL Out | Internal oscillator TTL output |
| Data buffer | The SR810 has an 8k point buffer. The SR830 has two 16k point buffers. Data is recorded at rates to 512 Hz and read through the computer interfaces. |
| Trigger In (TTL) | Trigger synchronizes data recording |
| Remote pre-amp | Provides power to the optional SR550, SR552 and SR554 preamplifiers |
| General | |
| Interfaces | IEEE-488.2 and RS-232 interfaces standard. All instrument functions can be controlled and read through IEEE-488.2 or RS-232 interfaces. |
| Power | 40 W, 100/120/220/240 VAC, 50/60 Hz |
| Dimensions | 17″ × 5.25″ × 19.5″ (WHL) |
| Weight | 23 lbs. |
| Warranty | One year parts and labor on defects in materials and workmanship |
