Posts tagged HF2LI

Webinar Summary and Q&A – Focus on recovering signals in optical experiments

on 23.11.2020 at 16:16 by claudius on Blog of Claudius Riek
This blog post accompanies the webinar “Focus on signal processing in optical experiments”. Thank you to everybody who joined the live event and participated actively by voting in the poll and asking so many relevant questions. The answers to all […]

LabOne for HF2: using digital lines as trigger sources

on 03.02.2016 at 11:39 by Romain Stomp on Blog of Romain Stomp
Since LabOne 15.11 release and onward, accessible from our download area, all HF2LI users with the enabled HF2LI-WEB option can now benefit from the latest software developments that were previously reserved for the UHFLI. One tool that is now totally new for this […]

Dynamic suppression of unwanted frequency components with an HF2LI

on 26.06.2015 at 14:17 by Paolo Navaretti on Blog of Paolo Navaretti
There are many experimental situations in which the component of interest in a signal is not the strongest one, but some other related component, for instance the side bands in amplitude or frequency modulated signals. In such a case, the […]

Loading data saved from the LabOne UI in Python

on 05.08.2014 at 17:07 by Daniel on Blog of Daniel Wright
Demodulator R signal with threshold.
The LabOne User Interface can continuously save instrument data such as demodulator samples to hard disk as binary data in MAT (Matlab®) files or as plain text in CSV (comma separated value) files. Using MAT files, demodulator data can be recorded at full […]

LabOne Programming Manual

on 30.06.2014 at 11:24 by Daniel on Blog of Daniel Wright
In addition to the LabOne User Interface Zurich Instruments lock-in amplifiers can be controlled simultaneously via any of the available LabOne APIs: LabVIEW, Matlab, Python or C. Zurich Instruments software release 14.02 includes the LabOne Programming Manual which guides users to an appropriate choice of API […]

Sideband Analysis with Lock-in Amplifiers

on 27.02.2014 at 20:10 by Sadik on Blog of Sadik Hafizovic
When a sinusoidal waveform is periodically modulated in either amplitude or frequency sidebands are generated as a result of this carrier modulation. These sidebands can be measured using a lock-in amplifier. Zurich Instruments lock-in amplifiers (HF2LI and UHFLI) can measure […]

Square Wave and Sawtooth Wave Generation with HF2LI Lock-in Amplifier

on 13.12.2013 at 09:52 by James Wei on Blog of James Wei
Normally, HF2LI users only generate sinusoidal waveforms with the HF2LI lock-in amplifiers. The HF2LI can also generate square and sawtooth waves, although this is not a supported feature. This blog will go through the setups necessary for doing just that. […]

Top 10 Ways to Improve Your Lock-in Amplifier Measurement

on 08.11.2013 at 10:55 by Sadik on Blog of Sadik Hafizovic
Meanwhile I have helped so many people working with lock-in amplifiers with a handful of generally applicable Tricks, that I’d like to share them in a compact compilation. Certainly they apply to the Zurich Instruments HF2LI Lock-in Amplifier and to […]

DC Offsets Measurement with the HF2LI Lock-in Amplifier

on 04.10.2013 at 11:55 by Romain Stomp on Blog of Romain Stomp
At first thought, DC measurements might be outside the scope of standard lock-in amplifiers. With the HF2LI one has several tools to monitor and record the DC offset while measuring the modulated signal. In practice, many customers need to record […]

How to set-up Kelvin Probe Feedback (FM-KPFM) with Direct Sideband Detection

on 28.08.2013 at 15:50 by Romain Stomp on Blog of Romain Stomp
HF2 users can already find valuable information on the HF2LI-MOD option in earlier blogs such as in Exploring the HF2LI-MOD: Measuring Bessel Functions for the difference between tandem and (direct) sideband detection or even schematics of various KPFM configurations in […]

Double-sideband Suppressed-carrier Modulation

on 28.08.2013 at 11:17 by Sadik on Blog of Sadik Hafizovic
Double-sideband Suppressed-carrier (DSB-SC) modulation is an amplitude modulation, which consists only of the two symmetrical sidebands and no carrier band. I came across this scheme in an ultra-sound application, where the power utilization can be maximized when all power is […]

Operate HF2LI dual-channel lock-in amplifier with one reference frequency

on 24.05.2013 at 11:43 by James Wei on Blog of James Wei
This blog quickly described how to synchronize the lock-in reference for both lock-in channels of HF2LI lock-in amplifier. HF2LI lock-in amplifier comes with two independent lock-in channels which offers HF2LI users substantially more flexibility compared to the single lock-in setup. With […]

ω/2 Demodulation for a Parametric Oscillator

on 27.02.2013 at 10:04 by James Wei on Blog of James Wei
We often get questions from HF2LI lock-in amplifier customers who characterize MEMS and sometimes from those doing AFM scans on how to measure at half reference frequency using a lock-in amplifier. Half reference frequency lock-in measurement is often necessary when […]

Connecting the Nanosurf Manual Controller to a Zurich Instruments HF2LI or HF2PLL

on 02.04.2012 at 09:39 by andreas on Blog of Andreas Senn
In March 2011, Nanosurf and Zurich Instruments announced a cooperation to establish the HF2PLL as official upgrade path for Nanosurf’s EasyPLL. This post shows how to connect Nanosurf’s Manual Controller to the Zurich Instruments HF2PLL. The Manual Controller combined with […]

Resolution, Scanning Speed and Demodulation Bandwidth

on 06.12.2011 at 09:40 by Andrin on Blog of Andrin Doll
This post is about the interplay between resolution, scanning speed and demodulation bandwidth. I demonstrate how the scanning process can be described in spatial, time and frequency domain, and show that this is a valuable toolbox to analyze your measurement setup as a whole.