User Manual

SGD-SB2025NT-TUM, Part 2
Jan 12 Page 84 TROUBLESHOOTING & MAINT
If circumstances should somehow arise that results in the firmware file being corrupted, although
the TM will not operate normally, it will run a special fall back program to allow the ‘Loader’ to be
connected so that replacement firmware can be loaded.
11.2.4 Network Interface
The NI will suspend normal operation during an upgrade. There are two Firmware programmes in
the NI:
(a). PIC Firmware . This is the main unit operating process and is changed using the Loader
application as detailed above.
(b). DSP Firmware . Digital Signals Processor (DSP) Firmware is changed using a function
integral to the NI ET.
11.2.5 NI DSP Firmware Up-issue
A DSP Firmware up-issue is executed by selecting the ‘DSP’ button of the NI ET (see
Section 2.6 ). This runs the Loader application from within the ET, which is used in exactly the
same way as for the NI PIC Firmware itself.
Figure 71. NI DSP Upgrade.
On the ‘Loader’ application window, select the ‘Load’ button to open a standard Open file window.
On the Open file window, locate the appropriate DSP ‘hex’ file and select the ‘Open’ button to
prime the file for loading. On the Loader application window, select the ‘Start’ button to instigate
the upload process. The progress bar indicates the time to completion.
The NI will automatically restart following a DSP upgrade and the new firmware version will be
reported in the DSP loader sub-window and on the bottom bar of the ET main window. Close the
DSP loader sub-window with the 

 (close) icon (top right).