11-09-2005 05:54 PM
11-10-2005 02:04 PM
11-14-2005 11:33 AM
11-17-2005 12:03 PM
11-17-2005 03:11 PM
11-17-2005 03:16 PM
11-17-2005 03:43 PM
Hi Lee
this was the code i mentioned in my first post http://sine.ni.com/apps/we/niepd_web_display.display_epd4?p_guid=BB0F7FFF28201C46E034080020E74861&p_... .
if you open the adc_test.llb , you will find two vi programs , adchistogram.vi and linearplots.vi , they perform the INL and DNL calculation , all i need is a modification of the adchistogram.vi to work with my acquired digital signals . As i mentioned in my previous posts i have 12 digital output lines , acquired into labview .
look forward to your response take care
chiplearner
11-18-2005 02:37 PM
01-02-2006 05:14 PM
Hi Lee
I am finally done with the static testing , the dynamic program still gives errors , right now the A/D data is read into 12 digital lines and then acquired into the card ,the problems i am facing right now are
1.Triggering the acquistion using daq assistant vi (the options in the task triggering appear grayed out , the alternative program using daqmx vi's gives an error in the reference trigger vi ) .I am attaching both the programs.
2.The logic behind the dynamic testing , currently I read in 12 digital lines for example
line 0 0 - sample 12
line1 0----sample 12
line2 0----sample 12
line3 0----sample 12
line 4 0--- same as above
line 5 0----- same
line 6 0
line 7 0
line8 0
line9 0
line10 1
line11 1
since my data acquistion program is set up that it will read each individual line for me to get the actual digital code of the analog input , i store the values in a array and transpose the array to read for example the above code
000000000011 .
and then use a D/A to convert it to the analog representation of the digital to perform the SNR ratio and other calculations that are straight forward.
the problem is when labview reads in each line and stores all the values , it stores the second index with the sample value , so when the analog waveform is reconstructed the x axis reflects the sample value not the frequency and looks different.
is there a way to read in the actual digital code at each sample value , instead of reading in as a array and transposing it and is triggering supported in pci -6289 for digital input and how can i use it .
would greatly appreciate your response
also wish you a very happy new year
thank you
chiplearner
01-02-2006 05:16 PM
the two labview programs that i mentioned in the above post for dynamic testing using acquired actual digital output of a/d converter