axing MK 16-00, Руководство по эксплуатации

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2021-08-01 | Technical improvements, changes in design, printing- and other errors reserved. 35
4.3.2. Fill level
The fill level depends on the number of activated channels in the channel list (menu item Phase 2) If the CROSS
MULTIPLEX MODE is active, it must be ensured that the maximum number of activated channels in one
modulator is not exceeded.
The data rate of the channels on the DVB-S/S2/S2x transponders may vary depending on the image contents
and on the transmission quality. To ensure an undisturbed reception, a reserve must absolutely be observed.
We recommend you to set the maximum fill level to 95%. If the current fill level exceeds the maximal fill level,
it may cause image disturbances, such as mosaic images. The LEDs on the front panel will light up in red in this
case.
The data rate of a DVB-C channel depends on the selected channel bandwidth (7 or 8 MHz), the set symbol
rate and the DVB-C modulation (QAM32;64;128;256) of the modulator.
If the displayed data rate exceeds 95%, there are different possibilities
to change it:
è
Change to a channel with a bandwidth of 8 MHz if a 7 MHz channel was selected previously.
è
Set DVB-C modulation to a larger value, for example, change from QAM 64 to QAM 128.
è
Reduce the number of selected channels in the channel list.
è
If the connected receivers support this option, increase the symbol rate.
4.3.3. Selected Programs
The program table SELECTED PROGRAMS shows the programs that were activated in phase 2.
4.4. Initialization - phase 3 (DVB-T)
Note: Depending on the modulation standard the signals are modulated into DVB-C or DVB-T (see 5.2 on page
41).
In phase 3, the modulators are configured.
After assigning programs to the modulator the fill level has to be conntrolled. With the parameters of the
modulator, the datarate can in certain circumstances be reduced.