help

[raoof]

hello

ohh thanks for reply...i am using laser diode FL500 which has 2 output one is vs =5v and other is vset here i am confused...

what i try was i pulg vs output to USB6009 output pin is that right?...and vset connected to usb6009 input in ai0 port ...but know i am confused to get ouput here ,,....reply please ...i am tried as working so long on it

thanks

[raoof]

this is datasheet for laser diode....

thanks

[crossrulz]

Vset is an INPUT to the driver.  It claims a 2kOhm impedance and states not to exceed 2V on that input.  So that puts the current at 1mA.  An analog output of the DAQ can handle that.  So connect AO0 to Vset.  You will use LabVIEW to set that voltage.

[Dennis_Knutson]

You still have not explained anything about how you are going to vary the dc in. If you can't do that, it makes no sense to try to plot the current. Attach a schematic of your setup. The design of your system would be an obvious first step.

[Dennis_Knutson]

Sorry, posted before you attached pdf.

[raoof]

HELLO

who to vary volatge that my confusion .....see my vi which i tried ... ia m attaching here...

when i conect vset to USB 6009 its show error regarding volatge vlaues

[RavensFan]

What does the error actually say?  Does it have an error number associated with it?

[raoof]

this is error....iam attaching now

[crossrulz]

What error are you getting?

Why are you using the Formula Node?  What is the sin function doing in there?  There is a nice simple function in LabVIEW called Ramp Pattern.vi (in the Signal Processing->Signal Generation palette).  Use that to make an array of the step voltages and then use a FOR loop with autoindexing to set the voltage.  Makes things a lot simpler.

[JÞB]

Well the sine of i*Step will vary from -1 to 1  Your task range is 0-2 so half of any possible values of "c" will result in an error