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5.6.1.1 File Names Created or Renamed Externally
Files may be created externally or created within the instrument and renamed externally (e.g.
using Link to PC mode). Such files may have long file names and/or include lower case
characters and additional characters such as ?.
The instrument will correctly list all such files that conform with an 8.3 naming system and which
have the correct extension for the relevant folder. Where the file name exceeds eight
characters, it will truncate the file name using a ~1 convention.
Files with the wrong extension, or which have been placed in the wrong folder will not be visible
to the instrument filing system. See section 5.7 for a description of file types and their file
extensions.
5.6.2 Internal Filing System Organisation
The organisation of the instrument filing system is not visible to the user from within the
instrument. Although a folder system exists, files are automatically placed into, or retrieved
from, the correct folder whenever a particular type of file is being used.
Similarly, when an external flash drive is connected, the instrument will automatically select the
correct external folder for the current file type.
The folder structure of the internal drive is only visible when linked to a PC - see section 5.6.5.
5.6.3 Understanding USB Connections
The instrument has two USB ports only one of which may be used at a time. The required port
is accessed by a sliding shutter which ensures that only the exposed port can be used.
The Type A port presents a USB host interface which will accept flash drives conforming to the
USB Mass Storage Class (MSC). Drives with capacities from 32MB to 32GB are supported.
This port is not compatible with any other class of device including the HUB class. If an
unsupported device type is connected a message will be displayed to alert the user.
NOTE: Certain small capacity USB flash drives have been seen that try to connect as a hub
before exposing the MSC device. This type of flash drive is not compatible and cannot be used
with this instrument.
When a compatible flash drive is connected to the instrument there will be no activity until the
Setup/Functions > System/File Ops > File Ops control screen is called up, then the Disk light
will flash and the Switch Drive key will become active. This key will allow access to the files
stored on the flash drive. The Copy key in the File Actions control screen will also become
available. See section 5.6.4
“Using an External Flash Drive” for more information on reading
and writing the flash drive.
The Mini B port is for connection to a PC and has two possible uses, each will cause the
instrument to expose a different device type to the PC. When the instrument is powered on the
Mini B port is inoperative and the PC, if connected, will not be able to 'see' the instrument. The
correct device type will be exposed when the user performs an appropriate action. The two
types of device that the instrument can expose are Mass Storage Class (MSC) and
Communications Device Class (CDC). These classes and their uses are discussed in the
following paragraphs.
The PSA will expose the MSC when the user executes Setup/Functions > System/File Ops >
File Ops and then chooses the Link to PC option from the File Ops control screen. See section
5.6.5
“Linking to a PC via USB” for more information.
The instrument will expose the CDC when the user executes Setup/Functions > System/File
Ops > System Utilities followed by Status/System > Screen > View on PC. This function is only
available with Option U01 enabled. For more information see 13
Appendix A “View on PC”.