DEVA Broadcast DEVA DB8000, Инструкция по техническому обслуживанию и эксплуатации

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SILENCE DETECTOR SETTINGS
The Silence Detector is to watch the levels of the signals applied at the DB8000’s Inputs. The
Input Signal will be changed over from the Main Input to some of the Alternative Signal Sources
as defined by Priority Settings. Levels of the parameters affecting Silence Detector performance
are User definable and these parameters are as follows:
- Threshold Level (in dB)
- Action Delay (in seconds)
- Release Delay (in seconds)
Whenever the Main Input Signal drops below the Threshold Level an Action Delay Timer will
be activated. Signal from the next Backup Source with the highest priority will be fed to the Output
Circuit of DB8000. The last operation will be carried out only if NO signal with level above the
Threshold Level appears at the Main Input for the time of Action Delay . Before switching over
to the Alternative Source Input, availability of signal there and its level will be verified. On the
contrary – the timer will be switched back to idle state if a signal passing over the
Threshold Level
appears at the Main Input before time elapsing (as defined by Action Delay). Signal presence
and signal levels of the Inputs with higher priority will be continuously monitored for the time a
Backup Signal Source is in use.
On the other hand Release Delay will be activated whenever DB8000 starts using any of the
Backup Signal Sources. Release Delay is the time to elapse before switching from Backup Signal
Source to the Main Input (in case a signal passing through Threshold Level appears there).
To perform the setting of the above three parameters please follow the next steps:
1. While in the Main Menu press the OK button;
2. Press the DOWN key and select Sub-menu
5.Silence Detector
.
3. Press the
OK
button. The
DOWN
key can be used to navigate through this Sub-menu which
looks like below:
4. Using UP or DOWN keys move the cursor and select the parameter to be edited;
5. Press the OK button again and the editing field will start blinking. Values that are needed can
be selected by UP or DOWN keys;
6. Press again
OK
button to confirm selection;
7. Press the LEFT key to exit to the Sub-menu or keep it pressed for more than 2 seconds to
exit to the Main Menu;
A graphical view of Silence Detector performance is shown below: