JohnRH Posted August 6, 2004 Report Share Posted August 6, 2004 I am looking for suggestions on what would be the simplest way of generating multiple (16) waveform outputs (~60Hz Sine, < 10V amplitude), for which I can change frequency and amplitude 'on the fly'. (without pausing the output to re-program it) NI has a lot of analog output boards, but I'm not sure how to tell if they can be controlled in this way. (all my LabVIEW experience until now has been serial IO and other communications type stuff) I am guessing that one of the 'static' output cards will not be adequate. The rest of the cards claim 'waveform' output capability which I am fairly certain I will need. I think I need 16bit resolution, so this seems to limit me to the "NI PCI-6733 High-Speed Analog Output - 1 MS/s, 16-Bit, 8 Channels" card. If I use this card, then I'll need at least two of them, and I am somewhat concerned that this will make it more difficult to accurately control the phase relationships between all the channels. In the end I plan to amplify the outputs to 120VAC (using HV op amps and isolation transformers) so that I'll have a low current (<3mA) 3 phase power simulation. (since I need such low current the option of using multiple programmable 3 phase power supplies proves to be expensive overkill). Related to this - I have NEVER written a LabVIEW program to do analog output. Is there anything I need to watch out for to make sure that changes to the output are glitch free? Is DAQmx the way to go? So - to summarize. I am looking for hardware and software recommendations that will ensure I am able to maintain continuous (but 'adjustable') waveform outputs. Thanks! Quote Link to comment
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