How can I run the National Instruments PCI-6052E at its maximum specified sample rate of 333kHz with the Data Acquisition Toolbox 2.12 (R2008a)?

I am trying to use the National Instruments PCI-6052E with two channels using the Data Acquisition Toolbox. I use the following commands to create the analog output object and add channels:

ao = analogoutput('nidaq','Dev3')

chans = addchannel(ao,0)

When I execute the PROPINFO command on the analog output object to check the maximum sample rate:

propinfo(ao,'SampleRate')

The maximum sample rate reported is 333,000:

          Type: 'double'

          Constraint: 'bounded'

          ConstraintValue: [0.6000 333000]

          DefaultValue: 1000

          ReadOnly: 'whileRunning'

          DeviceSpecific: 0

However, when I make use of both channels available on this device:

ao = analogoutput('nidaq','Dev3')

chans = addchannel(ao,0:1)

The maximum sample rate drops to 166,000. This is indicated by the output of the PROPINFO command on the analogoutput object:

%

          Type: 'double'

          Constraint: 'bounded'

          ConstraintValue: [0.6000 166000]

          DefaultValue: 1000

          ReadOnly: 'whileRunning'

          DeviceSpecific: 0

I would like to utilize the maximum sample rate of 333,000 Samples / second on both channels.

Answer 1

[MathWorks Support Team]

This enhancement has been incorporated in Release 2010a (R2010a). For previous product releases, read below for any possible workarounds:

To work around this issue with the Data Acquisition Toolbox 2.12 (R2008a), perform the following steps

1. Exit MATLAB.

2. Find the following file:

$MATLABROOT\toolbox\daq\daq\private\mwnidaqmx.ini

where $MATLABROOT is the MATLAB root installation directory obtained by issuing:

matlabroot

at the MATLAB Command Prompt.

3. Make a copy of this file and rename it to mwnidaqmx.ini.old.

4. Open the file mwnidaqmx.ini in a text editor, and search for the following line of text:

 [PCI-6052E]

5. In this section, replace the following line:

 maxAOSampleRate  = 333000,166000

with

 maxAOSampleRate  = 333000,333000

5. Save the file mwnidaqmx.ini and restart MATLAB.

For versions of Data Acquisition Toolbox prior to 2.10 (R2007a), there are no workarounds.

[Salaheddin Hosseinzadeh]

Is this applied to sound card 'winsound'? Because I can't use max sampling frequency of my device which is 192Khz, I'm limitted to 96K by MATLAB 2012a, and I really need it as I'm working on 20Khz and I can only take/make a 4 sampled signal!