Using 1KHz, 2usec ttl clock to pin 39 for external A/D clock. Using 'software trigger' to get any data sampling to show on the display. Under the "Acquisition info " it shows a different sample rate that is not my external rate but the default internal A/D clock freq set in the sample freq window box. The A/D appears to be not picking up the external clock. The manual says the clock frequency is always equal to the frequency of the external A/D sample clock input that you connect to the module. I do not see any place to select "external clock" within QuickDAQ acquisition tab . Is there some other place I need to go to recognize my external clock ? Do I need to also apply an external trigger as well ? I've tried various pulse widths and frequencies for the external clock with no change in result. Thanks.
Question
pmohan
Using 1KHz, 2usec ttl clock to pin 39 for external A/D clock. Using 'software trigger' to get any data sampling to show on the display. Under the "Acquisition info " it shows a different sample rate that is not my external rate but the default internal A/D clock freq set in the sample freq window box. The A/D appears to be not picking up the external clock. The manual says the clock frequency is always equal to the frequency of the external A/D sample clock input that you connect to the module. I do not see any place to select "external clock" within QuickDAQ acquisition tab . Is there some other place I need to go to recognize my external clock ? Do I need to also apply an external trigger as well ? I've tried various pulse widths and frequencies for the external clock with no change in result. Thanks.
Link to comment
Share on other sites
5 answers to this question
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now