Hello,
we are working on a .NET application which integrates the IVI drivers for the P9372A Vector network analizer.
I am not familiar with all the functionalities from the Agilent ivi interop dll, so i would like to know if there is any resource which describes the usage of functions to be able to capture the screen of the measurement, for example on a bitmap file.
Thank you
Assuming you are using the IVI-COM driver (I didn't see one for IVI.NET), I don't see a specific API call to get the screenshot directly. However, you probably can use the ScpiPassThrough command to get the screenshot back via SCPI. What programming language are you using?
Hello,
the application is built in C# , I am using scpi passthrough ( IAgNASystemScpiPassThrough ).
Is there a scpi command to get the screenshot? I have searched trough the keysight documentation, but did not find anything relevant....
By far the worst named SCPI command ever . I think it stands for Hardcopy Screendump Data. Harkens back to the day of printing the screen directly to a directly attached printer. Seriously old stuff... But, still works today!
http://na.support.keysight.com/pxi/help/latest/help.htm
Give it a whirl and let us know if you get it working or get stuck (a code snippet here would probably help someone in the future)
Hello,
here is the code snipet, derived from the C# console application sample from the ivi driver folder.
In the code bellow, i try to use marker, to get the S11 measurement amplitude ( Y axis) for each of each step in the given span frequency, save them to a 2D array, then try to plot them.
But i will try the Hardcopy screen dump command as well.
using System;
using System.Collections.Generic;
using System.Text;
using Agilent.AgNA.Interop;
namespace VnaConsole
{
class Program
{
static void Main(string[] args)
{
char[] charsToTrim = { '*', ' ', '\'', '\n', '"', '+' };
Console.WriteLine(" Read and Write IEEE Data CS_Example");
Console.WriteLine();
Agilent.AgNA.Interop.AgNA driver = null; // Version independenttry
{
// Create driver instance
driver = new Agilent.AgNA.Interop.AgNA();// Edit resource and options as needed. Resource is ignored if option Simulate=true
string resourceDesc = "PXI10::CHASSIS1::SLOT1::INDEX0::INSTR";
string initOptions = "QueryInstrStatus=true, Simulate=false, DriverSetup= Model=, Trace=false";bool idquery = true;
bool reset = true;// Initialize the driver. See driver help topic "Initializing the IVI-COM Driver" for additional information
driver.Initialize(resourceDesc, idquery, reset, initOptions);
Console.WriteLine("Driver Initialized");// Print a few IIviDriverIdentity properties
Console.WriteLine("Identifier: {0}", driver.Identity.Identifier);
Console.WriteLine("Revision: {0}", driver.Identity.Revision);
Console.WriteLine("Vendor: {0}", driver.Identity.Vendor);
Console.WriteLine("Description: {0}", driver.Identity.Description);
Console.WriteLine("Model: {0}", driver.Identity.InstrumentModel);
Console.WriteLine("FirmwareRev: {0}", driver.Identity.InstrumentFirmwareRevision);
Console.WriteLine("Serial #: {0}", driver.System.SerialNumber);
Console.WriteLine("\nSimulate: {0}\n", driver.DriverOperation.Simulate);
if (driver.DriverOperation.Simulate == false)
{
driver.System.Preset();
IAgNASystemScpiPassThrough ptrScpi = driver.System.ScpiPassThrough;
ptrScpi.WriteString("*IDN?");
string myIDN = ptrScpi.ReadString();// Reset the analyzer to instrument preset
ptrScpi.WriteString("SYSTem:FPRESET");
ptrScpi.WriteString("DISPlay:WINDow1:STATE ON"); // enable window1
ptrScpi.WriteString("DISPlay:WINDow2:STATE ON"); // enable window2
ptrScpi.WriteString("CALCulate:PARameter:DEFine:EXT 'PORT1',S11");
ptrScpi.WriteString("CALCulate:PARameter:DEFine:EXT 'PORT2',S22");ptrScpi.WriteString("DISPlay:WINDow1:TRACe1:FEED 'PORT1'");
ptrScpi.WriteString("DISPlay:WINDow2:TRACe1:FEED 'PORT2'");ptrScpi.WriteString("CALC:PAR:SEL 'PORT1'"); // select measurement Port1
ptrScpi.WriteString("CALC:MARK1:STAT ON"); // enable marker1
ptrScpi.WriteString("SENSe1:SWEep:POINts 7"); // set 7 sweep points
ptrScpi.WriteString("SENSe1:FREQuency:STARt 3500000000"); // set start freq to 3.5 Ghz
ptrScpi.WriteString("SENSe1:FREQuency:STOP 5000000000"); // set stop freq to 5 GHZptrScpi.WriteString("CALCulate1:DATA? FDATA");
string oooo = ptrScpi.ReadString();double fstart = 0;
double fstop = 0;
double fspan = 0;
double center = 0;
int ipoints = 0;
double fstep = 0;
bool status = false;ptrScpi.WriteString("SENSe1:FREQuency:STARt?"); // query start frequency - "+3.50000000000E+009" format
string sdata = ptrScpi.ReadString();status = Double.TryParse(sdata, out fstart);
ptrScpi.WriteString("SENSe1:FREQuency:STOP?"); // query stop frequency - format "+5.00000000000E+009"
sdata = ptrScpi.ReadString();status = Double.TryParse(sdata, out fstop);
ptrScpi.WriteString("SENS1:FREQ:SPAN?"); // query span frequency - "+1.50000000000E+009" format
sdata = ptrScpi.ReadString();status = Double.TryParse(sdata, out fspan);
ptrScpi.WriteString("SENSe1:SWEep:POINts?"); // query points "+4" format
sdata = ptrScpi.ReadString();
status = int.TryParse(sdata, out ipoints);
fstep = fspan / (ipoints - 1);
Console.WriteLine("Start Frequency: " + fstart.ToString() + "hz");
Console.WriteLine("Stop Frequency: " + fstop.ToString() + "hz");
Console.WriteLine("SPAN Frequency: " + fspan.ToString() + "hz");
Console.WriteLine("Number of Points: " + ipoints.ToString() );
Console.WriteLine("Freq/Step : " + fstep.ToString() + "hz");int maxPoints = 400;
int x = 0;
int y = 1;
double[,] values = new double[maxPoints,2];
double markFreq = fstart;
for(int i=0; i < ipoints; i++)
{ptrScpi.WriteString("CALC:MARK1:X " + markFreq.ToString()); // set marker to the desired frequency ( X axis)
ptrScpi.WriteString("CALC:MARK1:Y?"); // Read back the amplitude value ( Y axis)
string pp = ptrScpi.ReadString();
pp = pp.Substring(0, pp.IndexOf(','));
values[i, x] = markFreq;
bool sss = double.TryParse(pp, out values[i, y]);
Console.WriteLine("Step["+i.ToString()+"] :" +"Xfreq: "+markFreq.ToString()+ " -> measured Y: "+pp);
markFreq = markFreq + fstep; // increment to next step frequency}
}
// Check instrument for errors
int errorNum = -1;
string errorMsg = null;
Console.WriteLine("");
while (errorNum != 0)
{
driver.Utility.ErrorQuery(ref errorNum, ref errorMsg);
Console.WriteLine("ErrorQuery: {0}, {1}", errorNum, errorMsg);
}
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
finally
{
if (driver != null && driver.Initialized)
{
// Close the driver
driver.Close();
Console.WriteLine("Driver Closed");
}
}
Console.WriteLine("\nDone - Press Enter to Exit");
Console.ReadLine();}
}
}
Hello,
I believe you are using the agNA IVI-C / COM driver. Correct?
Note that a SCPI command for an image save is MMEMory:STORe .....
Below is an image of results via the SCPI command parser on an M937xA PXIe VNA and the syntax of the MMEM:STOR.. command. The full command invoked is "MEMM:STORE 'C:/Temp/image1.png'" which saves the current display to a PNG in the local C:\Temp folder.
You should be able to use an equivalent SCPI command via the agNA IVI - C / COM SCPI pass thru call.
Alternatively, you could attempt to use the associated IVI-C / COM driver call IAgNASystem.SaveState method. The help file related to this call indicates support for *.sta, *.cal, *.csa but not specifically for a PNG image file. It may or may not work as a PNG file save.
From the agNA help the following excerpt:
Parameters
Identifier
Identifier:
The type of file to save Choose from: STATe - Instrument states (.sta)CORRection - Calibration Data (.cal)CSARchive - Instrument state and calibration data (.csa)CSTate - Instrument state and link to Calibration data (.cst)
Instrument Command
MMEM:STOR {Identifier}
If you are able to get this to work then I believe you can go with either a PNG or a BMP as bitmap. The PNG is more recent and more efficient.
This same process worked successfully on a P937xA Streamline USB VNA as well (i.e. the MMEM:STOR ... SCPI command).
Sincerely,
tsilchia.
Hello,
i have tried to execute the following SCPI command MEMM:STORE 'D:/test/img.png , but it creates a picture with my PC desktop.
The same aproach i tried with the hardcopy command using the c# code from bellow
Why do i get image from my computer, and not from the instrument?
I am running Windows10-64 bit if it has any relavance
ptrScpi.WriteString("HCOPy:SDUMp:DATA:FORM PNG"); // setup PNG format
ptrScpi.WriteString("HCOPy:SDUMp:DATA?");
byte[] pngBinary = ptrScpi.ReadIEEEBlockUI1();
Image bmp = (Bitmap)((new ImageConverter()).ConvertFrom(pngBinary));
bmp.Save("D:\\test\\picpic.png", ImageFormat.Png);
So it is posible to capture the instrument screen when i am in remote mode?
I dont want to use Soft Front Panel.
The above commands only performa screen shot of my PC' desktop. Which is not helpfull.
Hello,
i did a bit of searching google regarding scpi commands, its not posible to import directly the screen image?
I am able to import only the measured values and plot them trough my own software?
Please let me know if my assumption is correct.