This documentation is designed to provide guidance to customers 
on how to upgrade DSG800 Spectrum Analyzers to the version in the "DSG800Update.rar" file. 
The applicable models include DSG815，DSG821，DSG836，DSG821A，DSG836A，DSG815Z，DSG821Z，DSG836Z.
 
New versions of firmware are available at the following website:
http://int.rigol.com/Support/SoftDownload/3

[Notices]

- Please make sure that your USB disk can be read correctly. 
  DSG800 is required to use an USB disk with FAT32 format. 

- During upgrade process, please do not cut off power and pull out the USB disk,
  otherwise the instrument will fail to work normally.

- During the process, the instrument cannot be in the remote mode 
  (Do not connect USB cable or the network cable).
 
- For some versions, previously saved state files cannot be used after upgrade. 
  Please make sure to keep a record of the necessary information of settings 
  before upgrade. 
 
[Upgrading Procedures]

1. Copy the upgrade file DSG800_UpdateFile.sys to the root directory of the USB disk.
 
2. Insert the USB disk into the USB interface.
 
3. Find the upgrade file in the "File->File Explorer", click "File->System Update" button.

4. When the upgrading is completed, please restart your DSG800.
 
[Troubleshooting]

- If you fail to upgrade, please visit the website int.rigol.com 
  to find contacts in your area. 