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Application Notes
Application Notes
In this application note, we produce the frequency response of a typical EMI/RFI filter and compare it to the manufacturer’s specified datasheet.
In this application note we present details of making measurements of the gain and phase of a linear voltage regulator. We employ an injection transformer to inject a small signal into the feedback loop and observe phase margins of two different load capacitors.
In the new iPad app version 1.9.1, the dynamic range and dynamic reserve have been significantly improved for the LIA. A digital gain option is no longer required for most measurements. In this document, we will walk through how to get the exact same result after the 1.9.1 update.
Lock-in amplifiers (LIAs) is a widely used instrument that can extract a signal of a known frequency that is overwhelmed by noise. It mixes the signal with a local oscillator (LO) and uses a lowpass filter to reject the noise at unwanted frequencies. This allows the LIA to detect not only the amplitude but also the phase of the signal in relation to the LO. In this document, we will walk you through how to configure Moku:Lab’s LIA to detect the amplitude and phase of a weak 50 kHz signal with an external reference.
Moku:Lab’s Phasemeter measures phase with up to 6 µradian precision for input signals oscillating between 1 kHz and 200 MHz. Using a digitally implemented phase-locked loop architecture, it provides exceptional dynamic range and precision far exceeding the capabilities of conventional lock-in amplifiers and frequency counters. Moku:Lab’s Phasemeter calculates and plots Allan Deviation, which is a unitless measure of stability, typically used to quantify the stability of clocks and other oscillators. In this guide, we will cover the math and provide an example Allan Deviation calculation with the overlapped variable τ estimator.
In this case study, we cover the real-world story of how one of our customers replaced several sophisticated electronic devices with Moku:Lab and used the Pound-Drever-Hall (PDH) technique to lock a Innolight Prometheus laser to a cavity.
In this application note, we present some examples of making accurate impedance measurements with Moku:Lab. In this first part, we will explore the maths of measuring resistance and accuracy. In the second part, we expand to explore capacitive and inductive measurements.
Oscilloscopes are essential test & measurement equipment in the lab. They are used to display, record, and analyze voltage waveforms, typically in the time domain. In this guide, we will use Moku:Lab’s built-in oscilloscope to introduce the basic functions while learning some important concepts and parameters of oscilloscopes. This will help you gain a better understanding of what an oscilloscope does, how it is typically used, and the concepts of sampling rate, bandwidth, triggers, etc.
Once Moku:Lab is fully booted, the front LED light represents the current network status.
In some scenarios like a classroom environment, you may want to display your screen touches and gestures within the Moku:Lab iPad App for demonstration purposes.
Moku:Lab can be returned to its default settings by pressing the Factory Reset button on the bottom of the device. This application note describes the two factory resets, Soft Reset and Hard Reset.
There are some situations, for example for reasons of security or radio interference, you may need to use Moku:Lab with neither Wi-Fi nor ethernet. This application note explains how to use either iPad or PC with a Moku:Lab via wired, USB connection. No wireless or wired ethernet network is required.