Lock-in amplifier with USB-6221

Hi,
I was just wondering if it is possible to set up a lock-in amplifier with a USB-6221 DAQ system.
Thank you.

Hi johndoe117,
Because the USB-6221 does not have dedicated ADCs for each channel, it is not recommended that we try and implement a Lock-In Amplifier. I would recommend using one of the DSA cards instead. I have included a KnowledgeBase article below that details what we look for when we want to implement a Lock-In Amplifier for some further information you may find helpful.
Lock-In Amplifier considerations: http://digital.ni.com/public.nsf/websearch/EBAADBD271ADFEC586256C86007B63F9
Regards,
Jason D
Applications Engineer
National Instruments

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  • How to use lock in amplifier start up kit?

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    lock in modern.llb ‏460 KB

    Claudia,
    thanks for the version mentioned.
    I would like to change the lock-In to one with a reference signal
    instaed of PLL, and a few other changes.
    I tried to understand how your sample works , but as soon as I'm
    reaching the VI's on a deeper level I'm running into code protection.
    Why are these VIs not public?
    Thanks
    Urs
    Claudia schrieb:
    >Hello,
    >
    >Another person was also asking for a Lock-In Amplifier Start-Up kit
    >that would not expire, and I published it in the following Discussion
    >Forum:
    >
    >href="http://exchange.ni.com/servlet/ProcessReque​st?RHIVEID=101&RPAGEID=135&HOID=506500000008000000​...
    >
    >Hope this helps,
    >
    >Claudia Lorente
    >Applications Engineer
    >N
    ational Instruments
    >http://www.ni.com/ask
    >
    >

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