I can not get the right frequency out of my NI-DAQ 6062E card from Matlab

Hi.
My name is Johan and I want to generate an analog square waveform with 5.76 kb/s in frequency with my NI DAQCard-6062E from Matlab.
When I run in Matlab the program below, I get the frequency of 5.747 kb/s on the output channel (even thou I have chosen 5.76 kb/s). When I try to change the sample rate, to higher values in Matlab, I get the same frequency until I choose the sample rate to 5.79 kb/s. The output signal is in that case is 5.813 kb/s.
So my problem is that I can't get the exact frequency of 5.76 kb/s.
How do I solve this.
Thankful for help.
Best regards, Johan
Program in Matlab:
clear all
openDAQ=daqfind; %Detect any open DAQ channels
for i=1:length(openDAQ), %Close any open DAQ channels
stop(openDAQ(i));
end
ao = analogoutput('nidaq',1); %Create an object for analog output
addchannel(ao, [0 1]);
set(ao, 'SampleRate', 2*5760); %Here the sample rate is specied. 2*, because to get right samplerate
y=[80,-80] %Sets theoutput values to 80 and -80 (As -1 and 1)
putdata(ao, [y' y']); %Sends the values to out buffer
set(ao,'RepeatOutput',inf) %Repeats sending in infinity
set(ao, 'TriggerType', 'Immediate'); %Choose trigger to immediate, because sending values shall occur driect after start command.
start(ao);
%stop(ao)

Hello Johan!
Bad news I am afraid….
I assume you are using the Data Acquisition Toolbox from the Mathworks and when it comes to support on that interface I have to advice you to contact the Mathworks for assistance. We don't provide any support on their data acquisition interface since we have nothing to do with it.
Sorry for the inconvenience this might cause you.
Regards,
Jimmie A.
Applications Engineer, National Instruments
Regards,
Jimmie Adolph
Systems Engineer Manager, National Instruments Northern Region
Bring Me The Horizon - Sempiternal

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I can not get the right frequency out of my NI-DAQ 6062E card from Matlab

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