QuantAsylum QA403 User Manual

QA402 User Manual
21
Windowing
The Windowing controls allow to select the window type. You can click on the “?” mark for some hints on the
different types of windows. In general, if you are using the DAC on the QA40x as the stimulus, then RECT or
HANN windowing is preferred. If you are using an external generator, then HANN is probably preferred. If
amplitude accuracy to 0.02 dB or so key, then FLAT TOP is preferred.
Measurements
You can quickly select the types of measurements you’d like to make from this control group. The buttons are
“one-shot” in that they don’t stay lit. If you press GAIN and you don’t currently have a measurement tile, then
a GAIN measurement will be added. If you already have a GAIN measurement tile, then it will be removed.
Note all measurements make sense in all modes of operation. For example, each of the measurements below
are ambiguous during a frequency response measurement.
The context menu for RMS measurements appears as below. Here is where you specify the frequency range
over which the RMS is calculated.

QuantAsylum QA403 Specifications

General

Type	Audio Analyzer
Dynamic Range	Up to 120 dB
Sample Rate	Up to 192 kHz
Output Impedance	50 Ω
Power Supply	USB Powered
ADC Resolution	24-bit
DAC Resolution	24-bit
Input Channels	2
Input Voltage Range	±10 V
Output Channels	2
Output Voltage Range	±10 V
Bit Depth	24-bit
Interface	USB
Operating System Compatibility	Windows, macOS, Linux

Summary

Safety Notice

Important Things to Know

Ground Reference

Explains USB ground, audio isolation, and establishing common reference points.

BNC Input Voltages

Details input voltage limits and the function of input capacitors.

BNC Output Voltages

Describes DC coupling, current limits, and potential damage to output stages.

QA40x Analyzer Features

Analyzer Front Panel

Describes the front panel layout, components, and LEDs of the QA402 analyzer.

BNC Inputs and Outputs

Understanding Differential Measurements

Software Installation

USB Drivers

Calibration

Plugging in your Hardware

Button and Control Panel Operation

QA40x Basic Controls

Measurement Display Area

Add Measurement

Filter Measurements

Trace Display Area

Control Groups

Axis Settings

Display Options

Acq (Acquisition) Settings

Weighting

Windowing

Measurements

THD and THD+N Measurements

Generators

Sine Generation

Multitone

Expo Chirp

Frequency Response Settings

Full Scale Input

Run/Stop

Triggered Acquisition

Cursors

Automated Tests