How to obtain data (voltage) from a Signal Generator connected through USB port and plot voltage vs. time

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Adnan Jahangir
Adnan Jahangir 2012-6-5
Hello Everyone, Hope you are all fine. I am facing some problem with my assignment. The assignment is to connect a Signal Generator to pc through* USB* port and read data from it. Then I have to write a program in MATLAB that uses the data to plot a voltage vs. time graph. The program should be real-time. That is if I change the amplitude of signal the plot will change immediately. Your help is much appreciated. Thank You.

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回答（3 个）

saima
saima 2012-6-5
put some details about the problem. it would be easier to help if you explain your problem
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Adnan Jahangir
Adnan Jahangir 2012-6-5
In other word, I have to program an oscilloscope with MATLAB. It will obtain data from a signal generator connected to USB port of computer and plot the voltage vs. time curve (As in an oscilloscope).

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Walter Roberson
Walter Roberson 2012-6-5
Using USB as your data interface is not compatible with real-time work or changing the plot "immediately". USB inherently works with packets (clumps) of data and MATLAB cannot read from a USB serial interface with less than a 40 millisecond delay after the data is generated, because of the way that USB was designed.
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Walter Roberson
Walter Roberson 2012-6-9
http://www.mathworks.com/help/techdoc/ref/serial.html
You will find communicating with the signal generator easier once you have located the referejce documentation for that particular model of signal generator, what-ever it is.

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Sabquat Bahar
Sabquat Bahar 2012-6-9
Dude, same problem here! :-(

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