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I am carrying out CAFM measurements of thin film samples using nanoscope IIIa equipped with a signal access module. We are carrying out both current mapping imaging and local I-V measurements at one position.
We want to access the current signal (during local I-V measurements) out from the signal access module. This is required for the noise measurements.
Is it possible to obtain CAFM current through one of the ports of the signal access module? Kindly advice how to proceed
Thanks in advance
Deepak
Hi Deepak,
Thanks again for providing more detial on this application, in our direct communication. I am glad to hear things work fine now.
Also thanks for pointing out that the correct BNC is the Aux-B one, and not the AUX-D one.
Peter
The exact BNC on whcih you can access the 'current' output depends on the type of signal access module (SAM) you have.
1) The small SAM-AM, which provides access to all the signals which go in & out the application modules like CAFM (the app module is ocnencted to this SAM by its 15pin micro-Dsub cable). Teh OUT-DC1 BNC is the one you look for.
2) The SAM (which is larger & rectangular and can have BNCs on both the top and side surface, or only the top surface): I think you can get the 'current' signal on the AUX-D BNC connector.
Can you please email me (peter.dewolf <at> bruker.com) tyour contact info & the details of the configuraiton you are using (controller / extender type / conductive-AFM module type / SAM type)?
When trying to display the AuxD signal on an external oscilloscope, make sure to connect to the AUXD-OUTPUT BNC, and not the INPUT one.