Comtech EF Data Vipersat SLM-5650A Guía de usuario Pagina 187

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Appendix A - VMS Cross Banding A-5
Figure A-4 illustrates the results of the VMS solution for managing and control-
ling the cross banded network described above.
Figure A-4
VMS Cross Banded Network Solution
The VMS calculated Translation Override Frequency (TOF) is an integer value
in Hertz that represents frequency offset of the cross banded transponders,
mapping the modulator frequency to the demodulator frequency. When the TOF
is set to a non-zero value, this value overrides the default satellite translation
value and is calculated with respect to the Downlink (Rx) frequency.
The TOF value is positive if the cross banded downlink transponder frequency
is lower than the Tx transponder band. The TOF value is negative if the cross
banded downlink transponder frequency is higher than the Tx transponder band.
Note that the VMS always subtracts the translation frequencies.
The figures below show the Create Transponder dialog for setting up VMS
cross banding values. In this example, the cross banding is between C-band and
Ku-band.
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