Software Overview
15
SLOU464A – March 2017 – Revised October 2017
Copyright © 2017, Texas Instruments Incorporated
TAS6422-Q1 Evaluation Module
3.5.2.5
AC Load Diagnostics Section
AC load diagnostics report speaker impedance and phase. The diagnostics can be performed with one or
all four channels.
Select the correct output impedance and click start. Follow the pop up instructions to complete the load
diagnostics run.
NOTE:
Make sure to set the digital input to 0 dBFS (100% full-scale). If the sine wave is provided
from the USB audio, turn the audio media volume and PC sound card volume to maximum.
Click on the “flip” icon located on the top right of the AC load diagnostics box to see the results.
Figure 16. AC Load Diagnostics Section
3.5.2.6
DC Load Diagnostics Section
The DC load diagnostics report if a channel is short to power, short to ground, short to load or open.
Select the impedance of the load from 0.5 to 5
Ω
. Click start and then click the “flip” on the top right of the
box to view results.
If a channel is selected as a line-out, click on “LO ENA LD” to enable line-out load diagnostics.
“Retry” box is used when DC load diagnostics are run more than one time.
DC load diagnostics can be aborted by click on the “Abort LD” box.
Figure 17. DC Load Diagnostics Section