Engel DVB-T Full HD Manual De Usuario página 55

3.2.1 Auto-reset functions and watchdog
During the normal operation of the MV7470, 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 MV7470 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 MV7470 will lock the functionality of its buttons after 5 minutes 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 approximately.
3.2.3 Digital attenuator
The MV7470 has an embedded digital attenuator. The user is able to select between
three different attenuation steps as follows:
1. 0 dB attenuation (Output level: 90dbμV) SSD will display: "00"
2. 10 dB attenuation (Output level: 80dbμV) SSD will display: "10"
3. 25 dB attenuation (Output level: 65dbμV) SSD will display: "25"
3.2.4 HDCP ON/OFF function
By pressing the "Channel / Profile" button for more than 5sec the user enables the
HDCP ON/OFF function. The SSD will display this status as follows:
1. H1 : Indicating that the HDCP is ON
2. H0 : Indicating that the HDCP is OFF
Using the Up/Down buttons the user is able to select one of the above status to
enable/disable the HDCP function. The MV7470 will exit from the current functio-
nality after being idle for more than 2-3sec.
3.2.5 USB interface for advance programming
The MV7470 provides a USB interface with the appropriate software for advanced
programming. For more information please read Appendix A.
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