Remote Spectrum Monitorâ„¢ MS27201A User Guide : Software Option Upgrades : Importing Software License
Importing Software License
Importing a new license file:
1. After receiving a new license file from Anritsu, place the file on the USB memory device in the top (root) level, not in any directory.
2. Open the System menu (3-line icon).
3. Navigate to Settings > Options menu.
4. Click Enable Options Using File at the lower right of Installed Options.

The instrument will search for a valid license file on the USB memory device and apply the changes to the system.
5. Reboot the instrument and ensure that all changes are applied.