Blog Entries

Release 1.791 and Portable Speakers

Release 1.791 and Portable Speakers

Release 1.791 (located here) has some tools for testing portable speakers & speakers in general. The portable battery-powered speaker segment i...
Automating EQ Tests using Masks

Automating EQ Tests using Masks

Release 1.79 is the latest release of the Q401 application (located here) and release 0.981 is the latest release of Tractor (located here). The QA...
Quickly Characterizing A Tone Knob Using Exponential Sweeps

Quickly Characterizing A Tone Knob Using Exponential Sweeps

A quick video to show how quickly a tone knob can be characterized using features that have been introduced in the last few releases. 
QA401 Release 1.760

QA401 Release 1.760

Release 1.76 for the QA401 should be out early next week and features the ability to build and apply masks to acquired data and deliver a pass/fail...
Basics: Power Amps

Basics: Power Amps

This post covers some of the more important points to consider when measuring power amps. From the setup to the measurements, if you are looking to...
Characterizing LDO Noise: Part 3

Characterizing LDO Noise: Part 3

In Part 2 of the examination of LDO noise, we ran into the limits of the QA401 while evaluating the output noise of the LT3042. And this shouldn't ...
QA401H, REST and Python

QA401H, REST and Python

Release 0.94 of QA401H is up at Github. Release 0.94 moves a step closer to shipping the headless version of the QA401 control software, and measur...
Characterizing LDO Noise: Part 2

Characterizing LDO Noise: Part 2

Previously we used the QA350 microvolt DVM to look at the standard deviation of different types of LDOs. That measurement helped us understand the ...
Automated Amplifier Testing with Tractor

Automated Amplifier Testing with Tractor

We previously went through a quick characterization of a tube guitar amplifier in the blog post located here, with a promise that we’d come back an...
Release 1.726 Graph Types

Release 1.726 Graph Types

The graphing plug-ins have been re-named and re-organized for 1.726. This post will highlight the types of graphs than can be created. Until the do...
TI TPA3255 EVM

TI TPA3255 EVM

Later this week 1.726 will release, with a lot of changes to plug-ins and graphing of stepped tests. The aim over the last month has been to dramat...
Fast Tube Amp Characterization

Fast Tube Amp Characterization

A look at how to quickly characterize a low-cost, 5W guitar amplifier.  And in case you missed it previously, a video looking at automation and me...