Moku:Lab多功能测量仪之锁相放大器(Lock-in Amplifier)介绍
Moku:Lab多功能测量仪之200MHz锁相放大器可用于探测被噪声掩埋的微弱电压信号。直观的用户界面允许用户使用整个框图中的探针点(probe points)极ng确配置系统并监控其性能。
主要特色
1、数字信号处理的方框图视图,内置探针点(probe points),用于信号的监测。
2、解调信号的频率高达200 MHz
3、测量被噪声淹没的信号,动态储备超过80 dB。
Moku:Lab多功能测量仪之200MHz锁相放大器视频展示
Moku:Lab多功能测量仪之锁相放大器的应用案例
Moku:Lab多功能测量仪之锁相放大器的规格参数
Signal channel
Input characteristics
Input frequency range | 1kHz - 200MHz |
Input voltage range | ±0.5 V into 50Ω |
Input impedance | 50Ω/1MΩ |
Input coup领 | AC/DC |
Demodulator
Sources | Internal Reference oscillator, Internal Auxiliary oscillator, External direct, External with phase-locked loop |
Types | Internal, External with PLL: Sine (In-phase)/Cosine (Quadrature) External direct: Sine (In-phase) |
Input gain2 | -20 dB/0 dB/+24 dB/+48 dB |
Filter mode | Low-pass filter |
Filter cut-off frequency range | 237 mHz - 3.98 MHz |
Filter time-constant | 251 ns - 4.219 s |
Filter slope | 6 dB or 12 dB per octave |
Phase shift precision | 0.001° |
Gain accuracy | ±1% |
Dynamic reserve | Better than 80 dB |
PLL frequency range | 2 MHz - 200 MHz |
PLL bandwidth | 10 kHz |
Reference oscillator
Reference and Auxiliary oscillators
Waveform | Sine |
Frequency range | 1 mHz - 200 MHz |
Frequency resolution | 3.55μHz |
Distortion | <-70 dBc for frequencies lower than 10 kHz |
<-60 dBc for frequencies greater than 10 kHz |
2+24 dB and +48 dB input gains are applied digitally and can be used to maximise the Lock-In Amplifier’s dynamic range for weak input signals.
Signal output
Output routing
Output sources | X, Y (cartesian mode); R,Θ(polar mode); Auxiliary Oscillator |
Output processing | Direct, PID3 |
Number of output channels | 2 |
Polar-mode | 0.8 V per cycle |
Gain profiles | Proportional (P), integral (I), differential (D), integral saturation (IS), differential saturation (DS) |
Controller frequency range | 100 mHz - 10 MHz |
Proportional gain | ±60 dB |
Integrator crossover frequency | 1.00 Hz to 100 kHz |
Differentiator crossover frequency | 10 Hz to 1 MHz |
Signal output
Output voltage range (peak AC + DC) | ±0.5 mV to ±1 V into 50Ω |
Gain range | -80 dB to +80 dB |
Saving Data
Saving data
File formats | Plain text: records data using a standard CSV format |
Binary: records data using a proprietary LI format for high-speed data logging. Note: data saved using the LI format must be converted to plain text using the LI file converter available here: https://github.com/liquidinstruments/lireader | |
Maximum samp领 rate | 1 MSa/s into RAM (format: *.li binary) (single channel) 500 kSa/s into RAM (format: *.li binary) (two channels) 100 kSa/s into SD card (format: *.li binary) 20 kSa/s into RAM/SD card (format: *.csv) Note: data saved to the Moku:Lab’s on-board RAM will be lost when the device is rebooted. |
Export modes | SD Card, Dropbox, E-mail and iCloud, My Files (iOS 11) |
Delayed log start time | Up to 240 hours |
Log duration | 1 second up to 240 hours |
3Only one output may have a PID controller routing at a time
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