PXI-6541 Voltage level

[Nico2808]

Hi,

    I'm using a PXI-6541 waveform generator & acquisition card, in generator mode. I've activated all channels on the data bus, set the data bus voltage level to logical family (3,3V)  describe a waveform. I've connected my PXI card to the CB2162 interface card to measure the voltage level (with no load, just my voltmeter) :

- Voltage on bit 0 to 15 is 3,3V

- Voltage on bit 16 to 31 is 1,68V, half voltage I want to have. And I see the same thing when I configure the data bus voltage level to 1,8V (I see 0,9V on bit 16 to 31) etc...

I really don't know why, is it a configuration problem ?

Thanks

[ClementG]

Hi,

Do you notice the same behavior if you try to generate on 1 bit at a time instead of generating on the 32 bits together ?

Regards,

[Nico2808]

Hi,

Yes I notice this even if I generate just 1 bit. If this bit is in the range bit 16 to 31, it's half voltage ....

I don't know if it's a hardware pb or just a configuration pb, but I've found nothing about that in the manual or examples.

Thank you