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Jul 18 2008, 06:36 AM
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#1
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4 more posts to go! Member Posts: 6 Joined: 18-July 08 Member No.: 12036 Using LabVIEW Since:2008 LV:8.20 ,. ,.
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Hi there!
Im new to LabVIEW and have some questions about signal generation. Im trying to generate sine on my daq6259. Frequency range should be from 50-7000Hz. Im also wondering why my input measurment of voltage doesnt show 0V. its never the same. sometimes 3V sometimes driffting slowly to -10.5. Im using LV8.20. Thank you for your help Urh8
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Jul 18 2008, 06:36 AM
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Jul 18 2008, 08:12 AM
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#2
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![]() Active Member Posts: 22 Joined: 11-July 06 From: Rocky/Glady/Mackay Member No.: 5552 Using LabVIEW Since:2004 LV:7.1 ,8.2.1 ,8.5.1
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One starting point would be in the examples folder:
examples\DAQmx\Analog Out\Generate Voltage.llb\Cont Gen Voltage Wfm-Ext Clk-Dig Start.vi This example can be found through the example finder in LabVIEW. You could also use the "sin" control on the trig pallet. As to the analogue inputs floating, do you have them terminated or are they just open circuit?
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Jul 18 2008, 09:28 AM
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#3
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4 more posts to go! Member Posts: 6 Joined: 18-July 08 Member No.: 12036 Using LabVIEW Since:2008 LV:8.20 ,. ,.
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Thank you for your help. But i already managed to produce signals. I havent tested it yet on outputs though. I used Simulate Signal box and conect it to DAQ Assistant which is properly set up.
But my inputs still dont work like they should. they are open circuits(if that means not conected to anything). any idea??
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Jul 18 2008, 02:17 PM
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#4
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Extremely Active Member Posts: 253 Joined: 15-October 04 From: Phoenix, AZ, USA Member No.: 839 Using LabVIEW Since:2000 LV:8.20 ,. ,.
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Inputs with open circuits are expected to float and drift around, sometimes pegging at the +/- rails. Try connecting a battery or shorting the input leads on a channel together. You should read the battery voltage, and with a shorted input you should read 0 volts.
-------------------- ‘It’s the questions that drive us'
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