使用matlab从频谱分析仪E4440A捕获屏幕图像？

嗨，我想捕获具有精确迹线，单位，比例等的频谱分析仪的屏幕图像...
它在设备上的外观。
有可能用matlab做到这一点吗？
这是我要设置的脚本。
最后一个命令'：MMEM ...'用于捕获屏幕，但它不起作用。
V- ---------------------------清除所有;
mxa_ip ='157.235.92.18';
mxa_port = 5025;
mxa = tcpip（mxa_ip，mxa_port）;
的fopen（MXA）;
idn = query（mxa，'* IDN？'）fprintf（'来自％s'的Hello，idn）;
％设置启动和停止频率fprintf（mxa，'：FREQ：START 2412 MHz'）;
fprintf（mxa，'：FREQ：STOP 2472 MHz'）;
％SET RBW TO 300KHZ fprintf（mxa，'：BAND：RES 1000 KHz'）;
％SET VBW TO 300KHZ fprintf（mxa，'：BAND：VID 30 KHz'）;
％save picture fprintf（mxa，'：MMEM：STOR：SCR C： Users  Administrator  Desktop  test.gif'）;
FCLOSE（MXA）;



     以下为原文

  Hi,
I would like to capture the screen image of the spectrum analyzer with exact trace, units, scale, etc... e.g. how it looks on the equipment.
Is it possible to do this with matlab? Here is my script to setup. the last command ':MMEM...' was used to capture the screen but it did not work.
V-
---------------------------

clear all;

mxa_ip = '157.235.92.18';
mxa_port = 5025;
mxa = tcpip(mxa_ip,mxa_port);

fopen(mxa);
idn=query(mxa,'*IDN?')
fprintf('Hello from %s ', idn);

% SET START AND STOP FREQUENCY
fprintf(mxa,':FREQ:START 2412 MHz');
fprintf(mxa,':FREQ:STOP 2472 MHz');
% SET RBW TO 300KHZ
fprintf(mxa,':BAND:RES 1000 KHz');

% SET VBW TO 300KHZ
fprintf(mxa,':BAND:VID 30 KHz');

% saving picture
fprintf(mxa,':MMEM:STOR:SCR C:UsersAdministratorDesktoptest.gif');

fclose(mxa);