Wegener DTV742, User Manual

Page: 41 / 50

DTV 742 User’s Manual
wegener.com 41 800057-01 Rev. B
3.6 Initialization
Software
Code
Structure The DTV742 Multiplexer contains the following unit software: A boot loader
and one version of operating application software. Before power-up, these
components are stored in non-volatile memory. The boot loader resides in a
portion of the memory that may only be written at the factory while the appli-
cation is stored in a portion of memory that can be over-written with down-
loads of new software. The boot code has the responsibility of deciding if the
resident application software image should be allowed to execute.
Initialization
Sequence At power up, the boot loader software executes first. It performs a test of RAM
and then relocates itself for further execution from there. (See
3.9 Software
Upgrades on page 43 for instructions on putting the DTV742 into serial com-
mand mode.) During boot-up, the following screens appear in sequence on the
LCD:
Following normal boot-up, the "home" screen will appear as described in sec-
tion
3.5 Front-panel Operation on page 34 and the LEDs reflect the actual
state of the unit.
Initialization
Failure When in Initialization Failure mode, the unit is essentially dead. There is no
ASI output, the alarm relay is de-energized (alarm state), the alarm LED is ON,
the general-purpose relays are all open, and the unit does not attempt acquisi-
tion of input streams. If repeated power-up sequencing continues to indicate an
initialization failure, call Wegener Customer Service for assistance.
FPCon v001
All front-panel LEDs light are
OFF during boot process.
Hit key to stop boot
Booting in 2
Booting System...
Bootloader Ver 103
Done Booting
Bootloader Ver 103