Dayton Audio DATS Dayton Audio Test System - Manual (Page 8)

8) Measure the driver’s V(as).
Once you have measured the speaker’s free air parameters the "Measure V(as)" button becomes enabled.
Select one of the three methods to measure the V(as) at the upper right side of the DATS screen. The three
V(as) measurement methods are:
Test Box Method - requires a suitable test box
Added Mass Method - requires you to add a known mass
Specified SPL Method - requires the SPL be known
Specified M(MD) Method - requires the M(MD) be known
Enter the required data and press the “Measure V(as)” button to start the measurement procedure.
9) After measuring the speaker you can:
• Save the data to one of 20 project memories.
• Save a DATS project file (file type .DATS) which includes your test setup and all 20 memories.
• Export the parameters and impedance data in either .txt or .zma formats.
• Overlay plots of various measured impedances from the 20 memories for detailed comparison.
• Print a report showing the impedance and parameters of the displayed memories.
10) Quit DATS.
Quit the DATS application software by using “Ctrl+Q” from the keyboard or by selecting “Exit” under the
“File” menu. On exit the software saves your application settings for the next session.
11) Future sessions with DATS.
In the future when you want to use DATS you only need to connect the DATS hardware unit and then
launch the DATS software. If you happen to launch the software first you will need to first select “Audio
Device Selection…” under the “Edit” menu so that DATS can scan for the hardware and select it for use.
The software will retain its calibration from session to session but it is still a good idea to verify the
calibration at the start of each session by sweeping the supplied calibration resistor or some other resistor of
known value.
Troubleshooting
If there is a problem, open the Windows Sound Control Panel and select the Audio tab. Then select the
Default device to be the “USB Audio CODEC” (this is the DATS hardware) as shown below at the left.
Click on “Volume…” to open the mixer shown below at the right. Make sure the “Speaker” and “Wave”
volumes are set to maximum and that the corresponding balance controls are set to center. Once the
Volumes are set correctly, the Default device does not have to remain set to the “USB Audio CODEC” and
can be set to another device if necessary.
Revised: 5Feb12