LeCroy - SCPI-Befehle funktionieren nicht

import java.io.*;  

import java.net.*;  

class ScpiSockTest  

{  

    public static void main(String[] args)  

    {  

       String instrumentName = "xxxxx";            // Put your instrument's name here  

        try  

        {      

       Socket t = new Socket(instrumentName,5025);        // Connect to instrument 

                // Setup read/write mechanism 

            BufferedWriter out =  

            new BufferedWriter( 

            new OutputStreamWriter(t.getOutputStream())); 

            BufferedReader in =  

            new BufferedReader( 

            new InputStreamReader(t.getInputStream())); 

            System.out.println("Setting frequency to 1 Ghz..."); 

            out.write("freq 1Ghz\n");                     // Set frequency  

            out.flush(); 

            System.out.println("Waiting for source to settle..."); 

            out.write("*opc?\n");                         // Wait for complete 

            out.flush(); 

            String opcResponse = in.readLine(); 

            if (!opcResponse.equals("1"))  

{ 

       System.err.println("Invalid response to '*OPC?'!"); 

       System.exit(1);                       

} 

       System.out.println("Retrieving instrument ID..."); 

       out.write("*idn?\n");                        // Query the id string

       out.flush(); 

       String idnResponse = in.readLine();            // Read the id string

                                                      // Pring the id string

       System.out.println("Instrument ID: " + idnResponse); 

}  

       catch (IOException e) 

{  

       System.out.println("Error" + e);  

     }  

   }  

}