RIGOL DSA875 - Manual (Page 22)

RIGOL Chapter 1 To Install&Run the Software
1-6 User’s Guide for EMI Test System
To Start the Software
After EMI Test System is successfully installed, you can start the software via the
following two methods.
(1) Via the [Start] menu or the shortcut icon on the PC desktop
Click [Start]  [All Program]  [RIGOL]  [EMI Test System] 
[EMI Test System] or double-click the shortcut icon named "EMI Test
System" on the PC desktop to start the software.
Note: In this mode, the communication between the software and instrument
cannot be built automatically (even if your PC has already been connected to
the spectrum analyzer). If you want to perform EMI test using the software,
you need to connect the instrument according to the remote interface (USB or
LAN) currently selected by the spectrum analyzer. Therefore, before
connecting the instrument, set the remote interface on the spectrum analyzer
(System  I/O Setting  Remote I/O  USB or LAN).
 USB interface communication:
Click the resource name in the "Online USB Resource" area under the USB
tab in the "Find Resource" dialog box and click "Connect", as shown in the
figure below.
Figure 1-1 USB Interface Communication