> Updating the Site Master Firmware
> To view the software package version currently installed on the instrument, press the Anritsu logo in the upper left corner of the display screen, then press the SW Info key in the Status dialog box.
> Software updates are downloaded from the Anritsu product page:
> http://www.anritsu.com/en-us/test-measurement/products/s331l
> Go to the Downloads page and download the installer to your PC.

> Note | The “Firmware Revision History” page has a link to download a summary of the firmware changes.

> 1. | Run the installer executable file and follow the on-screen instructions.

> 2. | After the firmware update is saved on a USB memory stick, remove the memory stick from the computer.

> 3. | With the Site Master instrument turned off, insert the memory stick into a USB port.

> 4. | Turn on the Site Master.

> 5. | Press the Preset (9) key.

> 6. | Under the Reset submenu, press Update Firmware. The Update Firmware dialog (Figure: Update Firmware Message) appears.

> Update Firmware Message

> 7. | Select CONTINUE to begin the firmware update or CANCEL to cancel.

> 8. | After the update is complete, the instrument will power down. Restart the instrument to complete the update.

> 9. | Software version information is displayed in the System Status dialog box. See Figure: System Info.

> Warning | Do not remove power or turn off the instrument during the firmware update to avoid potential serious damage to the instrument.