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lock-in_amplifiers

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lock-in_amplifiers [2026/05/08 10:38] – [MFLI Zurich Instrument] simonlock-in_amplifiers [2026/05/08 11:36] (current) – [Remote access] simon
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 ====== Lock-In Amplifiers ====== ====== Lock-In Amplifiers ======
 ===== MFLI Zurich Instrument ===== ===== MFLI Zurich Instrument =====
 +The Zurich Instruments MFLI is a high-performance digital lock-in amplifier platform designed for precision low-noise measurements, impedance spectroscopy, and advanced signal analysis. The base system operates from DC to 500 kHz, with an optional frequency extension up to 5 MHz (MF-F5M option). It combines FPGA-based digital signal processing with a modern web-based LabOne software environment for real-time control, visualization, and automation.
 +Key features include:
 +
 +  * Frequency range: DC – 500 kHz standard, expandable to 5 MHz
 +  * Ultra-low input noise: typically 2.5 nV/√Hz above 1 kHz
 +  * Dynamic reserve: up to 120 dB
 +  * 16-bit, 60 MSa/s digitization for precise signal acquisition
 +  * Sensitivity range: from 1 nV to 3 V (voltage input) and 10 fA to 10 mA (current input)
 +  * Support for single-ended and differential measurements
 +  * Optional multi-demodulator operation with up to 4 simultaneous demodulators and oscillators
 +  * Integrated tools including FFT spectrum analysis, sweeper, oscilloscope, PID/PLL control, data acquisition, and impedance analysis
 +  * High-speed interfaces via 1 GbE Ethernet and USB 2.0
 +  * Web-based LabOne software with API support for Python, MATLAB, LabVIEW, .NET, and C
 +  * Synchronization support via 10 MHz clock input/output and multi-device synchronization
 +
  
 It's manual can be found {{ :setup:lock_in:zimfli_usermanual.pdf |here}}. It's manual can be found {{ :setup:lock_in:zimfli_usermanual.pdf |here}}.
 +
 +==== Remote access ====
 +The MFLI is remotely controlled through the LabOne Data Server, which communicates over Ethernet (1 GbE) or USB 2.0. Remote access can be done either via the graphical LabOne web interface or through programming APIs (Python, MATLAB, LabVIEW, C, etc.).
 +
 To check if you have remote acces to the device use: To check if you have remote acces to the device use:
   * python3 -c "from zhinst.core import ziDAQServer; d=ziDAQServer('localhost', 8004, 6); print(d.getString('/zi/devices'))"   * python3 -c "from zhinst.core import ziDAQServer; d=ziDAQServer('localhost', 8004, 6); print(d.getString('/zi/devices'))"
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   * SR865 Lockin Amplifier: Connection x   * SR865 Lockin Amplifier: Connection x
  
 +===== EG&G 72xx =====
 +The Signal Recovery 7260 and 7280 DSP Lock-in Amplifiers are high-performance digital lock-in amplifiers designed for precision AC signal recovery and phase-sensitive measurements in noisy laboratory environments. Both systems use advanced DSP technology to provide high sensitivity, low phase noise, flexible operating modes, and extensive automation capabilities for scientific and industrial measurements. The 7260 supports measurements up to 250 kHz, while the 7280 extends the operating range up to 2 MHz for wide-bandwidth applications.
 +Key features include:
 +
 +  * Frequency range: up to 250 kHz (7260) and 2 MHz (7280)
 +  * Voltage sensitivity: down to the nanovolt range
 +  * Current sensitivity: down to the femtoampere range
 +  * Dual-phase demodulation with simultaneous X/Y and R/θ outputs
 +  * Dual reference and dual harmonic modes for simultaneous multi-frequency measurements
 +  * Virtual reference mode for reference-free signal detection
 +  * Integrated frequency and amplitude sweep generation
 +  * Low phase noise and high dynamic reserve for stable measurements under noisy conditions
 +  * Selectable digital filtering and programmable output time constants
 +  * Integrated noise measurement and spectral display functions
 +  * Auxiliary ADC/DAC channels and programmable digital I/O
 +  * Internal curve storage and graphical visualization capabilities
 +  * Remote control via RS232 and IEEE-488 (GPIB) interfaces
 +
 +There manuals can be found here:
 +  * {{ :setup:lock_in:190163-a-mnl-d.pdf |7260}}
 +  * {{ :setup:lock_in:190398-a-mnl-d_1_.pdf |7280}}
 +
 +==== Remote access ====
 +Both the 7280 and 7260 allow for daysi chaining. The 7260 is daisychained to the 7280 and the 7280 uses a startech RS-232 to Land adapter with the following properties:
 +  * Data Format on StarTech adapter: 9600-8N-1-N
 +  * 7280 Settings: Baud Rate 9600; Data Bits 8+0 parity; Parity none, Adress 0; Echo Off; Prompt Off; Delimiter cr(ASCII 13) 
 +
 +The 7260 uses the following properties
 +  * Baud Rate 9600; Data Bits 8+ no parity; Delimiter cr(013); Adress 1; Echo Off; Parity odd; Prompt Off
 +
 +Use the following command to test communication with the 72xx:
 +  * printf '\\N **0**\rID\r' | nc 192.168.100.19 4001
 +
 +it should reply:
 +  * 7280
 +
 +The bold number represents the adress number given in the RS-232 communication setting.
lock-in_amplifiers.1778229499.txt.gz · Last modified: by simon

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