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SR810 and SR830 Specifications

Signal Channel OutputsSine, TTL(When using an externalreference, both outputs are phase locked to the external reference.) Channel 14½-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, Voltage inputsSingle-ended or differentialSensitivity2 nVto 1 V Current input10 Displays θ , Y-noise, Aux 3 or Aux 4. The display can also be any of these quantities divided by Aux 3 or Aux 4.OffsetX, Y, R can be offset up to ±105 % of full scale.ExpandX, Y, R can be expanded by 10
6 or 10
8 V/AInput impedanceVoltage10 M Ω + 25 pF, AC or DC coupledCurrent1 k × â„¦ to virtual groundGain accuracy±1 % (±0.2 % typ.)Noise (typ.)6 nV/ or 100 × .Reference4½-digit LED display √ Hz at 1 kHz0.13 pA/ √ Hz at 1 kHz (10
6 V/A)0.013 pA/ Inputs and Outputs √ Hz at 100 Hz (10
8 V/A)Line filters50/60 Hz and 100/120 Hz (Q = 4 ) CMRR100 dB to 10 kHz, decreasing by 6 dB/oct above 10 kHzDynamic reserve>100 dB (without prefilters) Stability<5 ppm/°C CH1 outputX, R, X-noise, Aux 1 or Aux 2, (±10 V), updated at 512 HzCH2 output (SR830)Y, Frequency range0.001 Hz to 102.4 kHzReference inputTTLor sine (400 mVpp min.) Input impedance1 M Ω , 25 pFPhase resolution0.01° front panel, 0.008° throughcomputer interfaces Absolute phase error<1°Relative phase error<0.001°Orthogonality90° ± 0.001° Phase noiseInternal ref.Synthesized, <0.0001° rms at 1 kHz External 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 kHzHarmonic detection2F, 3F, ... nF to 102 kHz (n 10 kHz) @ 1 Vrms amplitudeAmplitude0.004 to 5 Vrms into 10 k Ω (2 mVresolution), 50 Ω output impedance, 50 mAmaximum current into 50 Ω Amplitude accuracy1 % Amplitude stability50 ppm/°C

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