FMUSER INTERNATIONAL GROUP INC.
广州市汉婷生物技术开发有限公司
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Rotation
Users can set the constellation rotation at this menu.
2.5.5 Rotation 1/1
[Off] On
When constellation rotation is used, the normalized cell values of each FEC block
coming from the constellation mapper are rotated in the complex plane and the
imaginary part cyclically delayed by one cell within a FEC block.
When constellation rotation is not used, the cells are passed onto the cell interleave
unmodified.
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Time IL Length
Users can set the time interleaving length at this menu. An inappropriate value will be
automatically and compulsorily corrected to adapt the settings.
The time interleave will typically act as a buffer for PLP data and therefore the output
may be delayed by a varying amount with respect to the input even when time
interleaving is not used.
If time interleaving is not used, set the Time IL Length=0.
2.5.6 Time IL Length
000
3.2.3
Output Setting
After entering Menu 3, the LCD displays submenus as follows:
3.1 RF Frequency 3.2 RF Output Level
3.3 Spectrum Invert 3.4 RF Level offset
3.5 RF Output 3.6 Pre-distortion
