02-23-2006 03:15 PM
02-23-2006 04:06 PM
Deepak:
1) That is one means, but you have to be careful about the range, that is the range of light intensity mapped to the range of voltage signal provided. A large change in intensity may only produce a small change in voltage. Here are some other photodiode circuits:
http://sales.hamamatsu.com/assets/applications/SSD/si_pd_circuit_examples.pdf
Personally, I prefer using a transimpedance amplifier- it has lower noise and faster response than just biasing the photodiode.
What is the make and model of your detector? Is the active area large enought so that you laser beam falls within it? Is the beam intensity too high which will result in saturation and nonlinearity of your signal?
2) It should have worked, as long as you don't exceed the 1 amp maximum current rating of the output.
3) Sorry, I have not used DAQ Assistant before, hopefully someone else will chime in.
Good luck!
02-23-2006 04:28 PM
03-02-2006 11:05 AM
03-02-2006 11:09 AM
03-02-2006 11:24 AM
03-23-2006 08:44 AM
Hi Dennis
I am measurng signal n differential mode without any custom scaling.Input ranges from 5 v to -5 v and "acquisition mode" is "N samples" with internal clock type.But I do not see any controls for clock settings o the DAQ icon.
Also,what is the application of external cock ?Have you ever used it ?
Thanks!
Deepak
03-23-2006 08:58 AM - edited 03-23-2006 08:58 AM
When you open the DAQ Assistant, you don't see this picture? If yours is different, attach a picture or the VI itself.
An exteranl clock source is just that. The source of the conversion clock can either be the internal clock on the DAQ board or something external like another data acquisition board.
Message Edited by Dennis Knutson on 03-23-200607:58 AM
03-29-2006 02:21 PM
Hi Dennis
I do see exactly the same .I just want to have the circled conrols at the front panel.
Thanks
Deepak
03-29-2006 04:16 PM