Meinberg GPS167TGP, Operating Instructions Manual

Page: 33 / 62

33
Resetting Factory Defaults
If both the NEXT key and the INC key on the front panel are pressed while the system
is powered up the battery buffered memory is cleared and user definable parameters
are reset to factory defaults. The key should be held until the root menu is displayed on
LCD. Due to the fact that the satellites´parameters have been cleared, the system
comes up in COLD BOOT mode.
Firmware Updates
Whenever the on-board software must be upgraded or modified, the new firmware can
be downloaded to the internal flash memory via the serial port COM0. There is no
need to open the metal case and insert a new EPROM.
If the MENU key on the front panel is pressed while the system is powered up, a
bootstrap-loader is actived and waits for instructions from the serial port COM0. The
new firmware can be sent to GPS167 from any standard PC with serial interface. A
loader program will be shipped together with the file containing the image of the new
firmware.
The contents of the program memory will not be modified until the loader program
has sent the command to erase the flash memory. So if the MENU key is pressed
unintentionally while the system is powered up, the firmware will not be changed
accidentially. After the next power-up, the system will be ready to operate again.