How to acquire Digital and Analog signals at same rate 10ks/s using 6025 ?

[Haider Abbas]

I want to acquire 8 lines of digital and 3 analog signals.
these signals should be writtern to file in spreadsheet
 
I am trying with 6025 card where bothe digital and analog channels are available ,
but on DAQ Asstt. vi when I tried to input the rate for digital inputs , it signals an error number
-2000777  and further says that
"You selected sample clock , You can select on Demand"
 
How to fix this problem?
thanks in advance
Matloob Hussain
 

[Haider Abbas]

 
can we use the clock of 6025 E board for "Digital In"?
if we can then how much fast we can go in Ks/s?
thanks
 
 
 

[Ed W]

Hi Haider,

 

Like Jesse said, the 6025E contains only static digital I/O, so there isn?t a digital input sample clock.  With that product, you will need to use software timing to perform the acquisition. 

 

This is usually done by reading the digital input in a while loop with a delay inside of it.  Each iteration, the device will take a sample, and the timing of the acquisitions will be system dependent ? your operating system will determine how often the samples are acquired.  This usually corresponds to an acquisition rate of about 300-500 samples per second, but depending on your PC, you may get more or less.

 

Ed W.

Applications Engineering

National Instruments

[Haider Abbas]

ok
then is it possible to go beyond 2k/s of Digital signal acquisition  accurately using software timing?
thanks
Haider

[Ed W]

Hi Haider,

 

You won?t be able to get 2kS/s with software timed acquisition.  Like I said in the last post, you?ll probably only be able to achieve around 300-500S/s for your acquisition rate.

 

Ed W.

Applications Engineer

National Instruments