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Operation instructions | MIE 8-00N | MIE 16-00N | MIE 32-00N | MIE 4-02N | MIE 8-02N | MIE 3-02N | MIE 6-02N
3.5.2.
MIE 8-00N, MIE 16-00N and MIE 32-00N (DVB-T)
Click on PHASE 3, to modify the setting of the modulators.
Configuration of the modulators
Select a
modulator
Select a modulator from MODULATOR 1 to MODULATOR 6 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
Norm
Output Channel
DVB-T Constellation
Page 38 of 70
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.
In this selection field, you can set the norm for the output channel spacing.
Note: Changing the norm works now according to following rules:
•
CCIR-->Australia : all modulators forced to 7MHz
•
Australia-->CCIR : all modulators forced to 8MHz, however with following exception: low
channels S2-S20 are 7MHz only, so those remain in 7MHz
Each of the modulators can be set to any output channel. No output channel may be selected
more than once!
The constellation can be set on QPSK, on QAM 16 or on QAM 64.
The QPSK-setting provides the smallest data rate to the output channel. The QPSK-modulation
process is used in bad distribution networks because of its robustness against disturbances and of
its safe transmission.
The QAM-modulation process allow reaching higher data rates, so that more programmes can be
transmitted on a channel. The QAM 64-modulation gives the highest data rate.
•
QPSK (2 bit) – small data rate – very robust signal.
•
QAM 16 (4 bit) – middle data rate.
•
QAM 64 (6 bit) – high data rate.
BA_MIE-N.pdf | Technical improvements, changes in design, printing- and other errors reserved. | 2023-06-15
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