2022-05-31 | Technical improvements, changes in design, printing- and other errors reserved. | BA_MIE.pdf |
Page 35 of 68
3.5.
Initialization - phase 3
Click on PHASE 3, to modify the setting of the modulators.
•
The MIE 8-00, MIE 16-00 and MIE 32-00 can be changed between DVB-C and DVB-T in maintenance (see 4.2 on page 44).
•
The MIE 4-02, MIE 8-02, MIE 3-02 and MIE 6-02 modulate the output signals in DVB-T2.
3.5.1.
MIE 8-00, MIE 16-00 and MIE 32-00 (DVB-C)
Configuration of the modulators
Select a modulator from MODULATOR 1 to MODULATOR 8 on the left.
Make the required changes.
Click SAVE for each modulator.
Only then the changes will be saved,
otherwise the changes will be lost.
Parameters:
Common Output level The
Common Output Level
option include a general attenuation of all modulator
outputs. The highest output level is reached with a setting of 20 dB, the lowest
level with a setting of 0 dB.
Output Channel
The modulators can be set to any output channel between S2 and CH 87.
No
output channel may be selected more than once!
DVB-C Constellation:
With DVB-C modulation, you can choose between 32QAM, 64QAM, 128QAM and
256QAM. 256QAM enables the highest data transmission rate, but it also requires
the best network quality.
DVB-C Symbol Rate:
The DVB-C symbol rate can be freely set between 1000 and 7500. The standard
value is 6900. Some networks also work with 6875. When working with a
bandwidth of 7 MHz, 6111 is customary.
Fine Level
The level fine adjustment attenuates the output level of each individual modulator
output separately from 0 to -3 dB.
In addition, each modulator output can be disabled (Off option).
Fine Tune
The
Fine Tune
adjustment of the output channel is performed in 0.5 MHz steps.
Select a modulator
