TTI PSA1302, Инструкция по эксплуатации, Страница: 37 / 61

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It should be noted that CDC is used only for screen data exchange when View on PC is
selected. It is not possible to transfer file data while in this mode. To exchange files between
instrument and PC requires MSC and in this mode View on PC is not available.
The user can, however, switch freely between these modes by executing the key sequences
above but connection to the View on PC application will be lost when Link to PC is selected.
5.6.4 Using an External Flash Drive
The USB Type A connector on the left hand side of the instrument is arranged as USB Host
and is intended exclusively for the connection of a USB Flash Drive.
This enables files to be copied to and from the internal memory of the instrument. Note that
files cannot be loaded from or saved to external memory directly.
Copy operations are performed using the File Ops (File Operations) function - see section 5.6.
The instrument pre-defines a folder system for the USB Flash Drive whereby different file types
are placed in specific folders. These folders are automatically created when the File Ops
function is selected with a Flash Drive plugged in.
A master folder is created called PSA within which are sub-folders named TRACES, IMAGES,
SETUPS, LOGS, and TABLES. Files copied from the instrument onto the external drive are
automatically placed into the correct folder. However, where files are being placed onto the
external drive from a personal computer, they must be put into the correct folder or it will not be
possible to copy them onto the instrument.
Note that, whenever the File Ops function is first used after a USB Flash Drive has been
plugged in or the instrument has been switched off, the files on the Flash Drive will be
interrogated and an information message will appear asking the user to wait for this to take
place.
If the Flash Drive is of large capacity and/or contains a large number of files, the interrogation
could take a long time. If the user wishes to abort this procedure, they may do so by simply
unplugging the Flash Drive. To avoid long delays, it is recommended that Flash Drives
containing large numbers of un-related files are not used.
Note that it is not possible to connect a USB Flash Drive if the USB Link to PC connection is in
place.
5.6.5 Linking to a PC via USB
The USB Type Mini B connector on the left hand side of the instrument is arranged as USB
“device” and is intended exclusively for connection to the USB port of a personal computer for
the transfer of files to or from the internal memory of the instrument.
The connection should be made using the cable supplied, which is a standard USB Mini B plug
to USB Standard A plug. Note that it is not possible to use the USB Link to PC when a USB
Flash Drive is connected.
“Link to PC” mode is selected via Setup/Functions > System/FileOps > File Ops > Link to PC
see section 5.6. When the key is pressed all spectrum analyzer activity is suspended and the
instrument waits for the PC to recogn
ise its Flash based disc drive and “log it on”.
When the link is enabled, the internal drive of the instrument appears on the PC as a removable
disc drive. When in this condition, the PC is in control of the link and file operations are
performed on the PC using Windows Explorer or a similar file system manager.
When in this mode, all of the user area of the internal drive becomes accessible. It is
therefore possible to rename files and directories, delete directories or to add invalid
files. Care must be taken NOT to do this.
The internal drive contains a master folder named PSA within which are five folders: TRACES,
IMAGES, SETUPS, LOGS, and TABLES. Only the correct file types must be placed into these
folders, no files should be placed in the Root folder and no additional folders created.