Engel MV7480 Manual De Usuario página 55

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3.2.1 Auto-reset functions and watchdog
During the normal operation of the MV7480, the main CPU monitors all the internal
parts in order to ensure that the device works normally. In case of an internal error
or module failure, the MV7480 immediately initiates the recovery procedure by re-
setting the appropriate module or the device. Finally, watchdog timers ensure that
the device will be reset in case of CPU failure.
3.2.2 Buttons lock-mechanism
The MV7480 will lock the functionality of its buttons after one minute idle time to
avoid of being pushed accidentally. Two red dots on the SSD notify the user that the
button interface is locked. To unlock it, the user must press simultaneously the UP
+ DOWN buttons for 5 seconds.
3.2.3 Input redundant source mode
When the MV7480 detects a valid input source coming (eg. from the HDMI input), it
will "mark" this source as its primary source. In case of a failure of the primary sou-
rce, the MV7480 will automatically switch to secondary source which in our case
the CVBS input.
3.2.4 USB interface for advance programming
The MV7480 provides a USB interface with the appropriate software for advanced
programming. For more information please read Appendix A.
BLOCK DIAGRAM
HDMI RF-out
H.264 DVB-T (COFDM)
TS Mux
encoder modulator
Audio/Video
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