電壓輸入             Single-ended or differential
分辨率                 2 nV to 1 V
電流輸入             10⁶ or 10⁸ V/A
輸入阻抗
        電壓             10 MΩ + 25 pF, AC or DC coupled
        電流             1 kΩ to virtual ground
增益精度             ±1 % (±0.2 % typ.)
噪聲 (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)
線性濾波             50/60 Hz and 100/120 Hz (Q = 4 )
CMRR                 100 dB to 10 kHz, decreasing by 6 dB/oct above 10 kHz
動(dòng)態(tài)范圍              >100 dB (without prefilters)
穩(wěn)定性                  <5 ppm/°C

參考通道
頻率范圍              0.001 Hz to 102.4 kHz
參考輸入              TTL or sine (400 mVpp min.)
輸入阻抗              1 MΩ, 25 pF
相位分辨率          0.01° front panel, 0.008° through computer interface
相位誤差      <1°
相對(duì)相位誤差      <0.001°
正交性                  90° ± 0.001°
相位噪聲
               Internal ref. Synthesized, <0.0001° rms at 1 kHz
               External ref. 0.005° rms at 1 kHz (100 ms time constant, 12 dB/oct)
相位漂移             <0.01°/°C below 10 kHz,
                             <0.1°/°C above 10 kHz
諧波檢測(cè)             2F, 3F, ... nF to 102 kHz (n < 19,999)
收集時(shí)間             (2 cycles + 5 ms) or 40 ms,whichever is larger

解調(diào)器
穩(wěn)定性                 Digital outputs and display: no drift Analog outputs: <5 ppm/°C for all dynamic 
                             reserve settings
諧波抑制器         −90 dB
時(shí)間常數(shù)             10 μs to 30 ks (6, 12, 18, 24 dB/oct rolloff). Synchronous filters available below 200 Hz.

內(nèi)部振蕩器
范圍                    1 mHz to 102 kHz
頻率精度            25 ppm + 30 μHz
頻率分辨率        4½ digits or 0.1 mHz, whichever is greater
失真                    −80 dBc (f <10 kHz), −70 dBc(f >10 kHz) @ 1 Vrms amplitude
振幅                    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.)

顯示
通道1                   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.
通道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. 
補(bǔ)償                      X, Y, R can be offset up to ±105 % of full scale.
放大倍率              X, Y, R can be expanded by 10× or 100×.
參考                      4½-digit LED display

輸入和輸出
CH1輸出              X, R, X-noise, Aux 1 or Aux 2,(±10 V), updated at 512 Hz
CH2輸出              (SR830) Y, θ, Y-noise, Aux 3 or Aux 4,(±10 V), updated at 512 Hz
X, Y輸出                In-phase and quadrature components (rear panel) (±10 V), updated at 256 kHz.
Aux. A/D inputs              4 BNC inputs, 16-bit, ±10 V,1 mV resolution, sampled at 512 Hz
Aux. D/A outputs            4 BNC outputs, 16-bit, ±10 V, 1 mV resolution 
正弦                         Internal oscillator analog output
TTL輸出                  Internal oscillator TTL output
數(shù)據(jù)緩沖器             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.
觸發(fā)輸入 (TTL)      Trigger synchronizes data recording
遠(yuǎn)程放大器              Provides power to the optional SR550, R552 and SR554 preamps

規(guī)格
連接口                       IEEE-488.2 and RS-232 interfaces standard. All instrument functions can be 
                                   controlled and read through IEEE-488.2 or RS-232 interfaces.