QuantAsylum QA401 User
’s
Manual
Page
7
Also, when changing the sample rate on the QA401, the codecs will be reset to ensure proper
application of their changed register settings. That will also generate a click or pop on the outputs.
Normally, these clicks and pops wo
n’t present issues. But if you are working on very high
-gain stages
with speakers or headphones attached, first take the time to familiarize yourself how the various mode
changes may impact your equipment under test.
QA401 Analyzer Features
The QA401 is our second-generation audio analyzer. Our goal in building the QA400 and the QA401 was
to leverage modern ADC and DAC codecs commonly used for audio analysis, while at the same time
eliminating some of the bigger problems that come with re-purposing audio ADCs for audio
measurement.
The QA401 Features:
•
Stereo differential LEFT + RIGHT inputs
•
Stereo differential LEFT + RIGHT outputs
•
24-bit ADC and DAC
•
Fully isolated from the PC
•
Input attenuator and hardware-based overload protection
•
USB powered
We hope you enjoy your purchase! Check back from time to time for new software updates, and drop by
the forum to say "hello" or ask a question!
Analyzer Front Panel
This section covers the various connectors on the analyzer and reviews the input and/or output
characteristics of these connectors.
Front Panel Summary
The front panel is shown in the picture below. From left to right, the following entities are explained.
