Acquire waveform using DSOZ204A and Scilab

Hello everyone,

I'm in trouble acquiring the waveform of my oscilloscope DSOZ204A. I'm connected in LAN and the connexion is ok as *IDN? works.

The function I use is the following

 

function [num_values]=DSOZ204A_save_waveform(id)
 
 //Get the waveform type
 DSOZ204A_write(id,":WAVeform:TYPE?")
 ans=DSOZ204A_read(id,128)
 disp("Waveform type :"+string(ans))
 
 //Get the number of waveform points
 DSOZ204A_write(id,":WAVeform:POINts?")
 nb_pt=DSOZ204A_read(id,128)
 disp("Waveform points :"+string(nb_pt))
 nb_pt=strtod(nb_pt);
  
 //Choose the format of the data returned
 DSOZ204A_write(id,":WAVeform:FORMat ASCii")
 DSOZ204A_write(id,":WAVeform:FORMat?")
 ans=DSOZ204A_read(id,128) 
 disp("Waveform format :"+string(ans))
 
 //Display waveform settings
 DSOZ204A_write(id,":WAVeform:XINCrement?") 
 x_increment=DSOZ204A_read(id,128)
 disp("Waveform X increment "+string(x_increment))
 x_increment=strtod(x_increment)
 
 DSOZ204A_write(id,":WAVeform:XORigin?") 
 x_origin=DSOZ204A_read(id,128)
 disp("Waveform X origin "+string(x_origin))
 x_origin=strtod(x_origin)
 
 DSOZ204A_write(id,":WAVeform:YINCrement?") 
 y_increment=DSOZ204A_read(id,128)
 disp("Waveform Y increment "+string(y_increment)) 
 
 DSOZ204A_write(id,":WAVeform:YORigin?") 
 y_origin=DSOZ204A_read(id,128)
 disp("Waveform Y origin "+string(y_origin))
 
 //read waveform data
 DSOZ204A_write(id,":WAVeform:DATA? 1, 50") 
 num_values=DSOZ204A_read(id,1200)
 num_values=strsubst(num_values,","," ") //replace "," by " " in the string
 num_values=strsplit(num_values," ")
 [num_values]=strtod(num_values) //Converts from string to double
 num_values=num_values(1:50);    //delete NaN value

 nb_loop=(nb_pt-pmodulo(nb_pt,50))/50
 for (i=1:nb_loop-1)
  start_pt=50+(i-1)*50+1
  end_pt=50+i*50;
  cmd=":WAVeform:DATA? "+string(start_pt)+", "+string(end_pt)
  DSOZ204A_write(id,cmd) 
  num_values_int=DSOZ204A_read(id,1200)
  num_values_int=strsubst(num_values_int,","," ") //replace "," by " " in the string
  num_values_int=strsplit(num_values_int," ")
  [num_values_int]=strtod(num_values_int) //Converts from string to double
  //num_values_int=num_values_int(1:50);
  
  //concatenation of vectors
  num_values=[num_values',num_values_int']
  num_values=num_values'
 end
 
 tempo=linspace(x_origin,x_origin+length(num_values)*x_increment,length(num_values))
 tempo=tempo(1:length(num_values))
 tempo=tempo'
 plot(tempo,num_values)
  
 disp("end of process")
 
endfunction

I first tried to read all the data using ":WAVeform:DATA?" and "DSOZ204A_read(id,1200)" but Scilab crash and lacks of memory. So I tried to acquire less points and it works with about fifty points. Thus, my idea was to acquire the waveform segment after segment -which is honestly not a good idea-. By setting the number of points by 200 it works but still not work with more points.

Does anyone have an idea to solve my problem?

NB: I link the code used.

Regards,

Quentin