Configuring The Modulator And The Format Input; Figure 72: Direct Modulator Input, As Seen In The Main Modulator Window - Safran CORTEX Series User Manual

3.6.4.1.2

Configuring the modulator and the format input

Direct input to the modulator can be obtained by following these guidelines:

Use FPGA #1 for modulator

Activate (mount) MDU1, MFI, and IFO in the global table

In MDU 1:
o Set MDU1 to the desired settings in terms of modulation, carrier frequency, RRC
filtering, PCM code and phase rotation.
o Set the Bitrate to the target overall bitrate:

In symbol mode, multiply the desired clock rate by the order of modulation

In data mode, multiply the desired clock rate by the input parallelism
o Declare the Format Input as the input to the modulator

In MFI:
o Set the input type as standard
o Select the data scheme (Hard Symbol or Data with required parallelism)

Connect the required signals to the modulator board (please refer to Table 15: connectors
allocation, single Ended ECL

)
Below lies an example of a correct setting for direct input of serial data to a QPSK, 100 Mbps
modulator.

Figure 72: direct modulator input, as seen in the main modulator window

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Ref. DTU 100782
Is.Rev 3.5
Date: June 1, 2021
Safran Data Systems
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