Agilent Technologies FieldFox MW N9913A, Service Manual

Page: 78 / 156

5-28 N9927-90003
Theory of Operation FieldFox Analyzer
Firmware Related Information
Firmware Related Information
General Description
The analyzer is based on the Windows CE
1
operating system. This is a closed system; no direct user
access to the desktop of general operating system functions is provided.
The file system for Windows CE is maintained in flash memory on the A6 SOM board. There is limited
access to the file system. Most memory is in a protected region and not directly accessible by the user.
The user accessible memory is under UserData. See the “File Management” section of the FieldFox
Analyzer User’s Guide (Part Number N9927-90001) for instructions on saving, recalling, and managing
files in the unprotected memory.
User Accessible Files
• Directory structure below UserData in the A6 SOM board flash memory.
• External USB flash memory plugged in the analyzer.
• External SD memory card plugged into the analyzer.
NOTE: When copying files, a “Copy_....” directory is created at the root of the destination device as the
destination for the copied file(s). This characteristic generally makes it impossible to copy a file into the
desired directory under UserData in the A6 SOM board flash memory. This limits the usefulness of
copying files to or within UserData.
Operational Files
• Results from adjustments performed under TME (see Chapter 3 )—not directly available to user.
• File resulting from CAT/NA/VVM user calibration—not directly available to user.
• Cal kit definition files—stored in UserData\calkits.
• Cable definition files—stored in UserData\Cables.
• Error log—not directly available to user. See “Error Log” further on in this section for accessing error
log information.
Erase User Data Utility
A utility to erase all directories and files in the UserData directory is available. After the flash memory is
erased, the boot process returns the UserData directories and files to the state as shipped from the factory.
The System Information screen indicates the time and date of the most recent erase.
See Chapter 8 for instructions on executing the Erase User data utility.
1. Windows
®
and Windows CE
®
are U.S. registered trademarks of Microsoft Corporation.