EXFO FTB-8500 Series for FTB-500 - Manual (Page 524)

Pop-Up Windows
510 FTB-8500 Series and FTB-8120NGE/8130NGE
Data Capture Export
Once generated, the capture file will be automatically opened in
Wireshark when the View File After Generation check box is
selected.
The capture file report may also be manually opened within Wireshark
typically using Windows Explorer.