![background image](http://html1.mh-extra.com/html/east-tester/et3325/et3325_user-manual_3447938051.webp)
2. When editing an wrong file name, use the left and right keys to move the cursor to select the
wrong letters you want to delete, press the Delete soft key to delete and re-edit the file name to
be input;
3. Select Finish ending the file name inputting.
2.7.4 Interface
Press
→ Interface → Select, enter the interface shown below to check the basic information
of USB interface and RS232 interface.
Figure 2-40 Interface Information
2.7.5 Calibration
Signal generator has been calibrated when leaving the factory. We do not recommend users to
calibrate individually. Contact the local dealer for calibration services.
2.7.6 System upgrade
System upgrades contains THREE/40MHZ modules: software module, communication module
and logic module.
The system supports U-disk upgrade. When the U-disk is inserted, the system will automatically
detect the upgrade file package, and if any, the interface will suggest that the module can be
upgraded.
After the upgrade is finished, please restart the device to complete the upgrade.
Note:
Be cautious to upgrade the system, please download from the company's official website or