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How to eliminate ghosting effect or cross talk?

Hello,

 

I am using PCI 6070 E DAQ card with DAQmx 9.5 driver. I am using this card to read 10 analog inputs (10 Sensors) on 10 Channels. The problem is even if I disconnect e.g. channel 1 from from the sensor1, I am getting the signal which is from sensor2. i.e. the signal from sensor 2 is reflected on channel 1. I tried to change the convert rate using DAQmx Timing API to increase inter channel delay BUT this did not solved my problem. Does anyone have solution to suggestions?

 

thanks in advance

 

 

regards,

swap

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There is a knowledgebase article about it... somewhere on the ni site.....

 

Shortcut/ground one channel, say AI11. in the scan list alternate the channels with the grounded one ( A01,AI11,AI02,AI11,AI03,AI11,... )

Discard all the AI11 readings ...

 

Samplerate as low as possible and the source output impedances as low as possible.

 

 

Greetings from Germany
Henrik

LV since v3.1

“ground” is a convenient fantasy

'˙˙˙˙uıɐƃɐ lɐıp puɐ °06 ǝuoɥd ɹnoʎ uɹnʇ ǝsɐǝld 'ʎɹɐuıƃɐɯı sı pǝlɐıp ǝʌɐɥ noʎ ɹǝqɯnu ǝɥʇ'


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Hi,

 

thanks for the reply....I have seen the knowledge database........but it didn't help me to solve my problem........I tried the way you told but it is not possible to add the same channel (i.e. AI11 as u said ) multiple times in the scan list.............LabView gives error

 

 

 

regards,

swap

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Please take a look at these pages

 

http://digital.ni.com/public.nsf/websearch/4E9B8B3F8FD3A31B862562B5004EA1D9?OpenDocument

http://digital.ni.com/public.nsf/websearch/B9BCDFD960C06B9186256A37007490CD?OpenDocument

Veronika Kurz

National Instruments
Applications Engineering
www.ni.com/support
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