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Bias remains of output of PXI5412

Hello everyone, 

 

In my test setup I'm using a PXI5412 to generate a arbitrary waveform (one specific pulse) and apply this signal to a device. With a PXI5105 I measure the response of the device. After this I move to the next device and repeat the measurement (with the same waveform).

 

My problem is that their remains a DC bias on the output of the PXI5412 after doing a measurement which influences the next measurement (even when the arbitrary waveform ends with 0V). The strange thing is that this bias seems to vary random after each measurement between -1.5 V and 1.5V. 

 

Can anybody tell me why this DC bias stays on the output after a measurement?

 

Kind regards,

Patrick

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Hi Patrick,

 

Does the same thing happen if you try to output a wave made up of all one value (eg. 1V). If not you could do something similar at the end of each waveform to force the output to a known value.

Regards,

Al C
National Instruments,
Application Engineer
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