SR830和SR810數(shù)字鎖相放大器具有高性能，低價(jià)格等優(yōu)勢。SR830數(shù)字鎖相放大器既顯示幅值，有顯示相位值。SR810鎖相放大器只顯示幅值。
使用數(shù)字處理技術(shù)（DSP）*取代了傳統(tǒng)的由解調(diào)器，濾波器和放大器組成的鎖相放大器。主要性能：頻率范圍1mHz 到102.4kHz
＞100dB 的動態(tài)保留
穩(wěn)定性為5ppm/℃
0.01 度的相位分辨率
時(shí)間常數(shù)為10μs 到30ks（*大24dB倍頻程衰減速率）
具有自動獲取，自動定相，自動存儲
自動補(bǔ)償功能
合成參考光源
GPIB 和RS-232 兩種接口技術(shù)參數(shù)
信號通道電壓輸入 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 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.
