The invention proposes a radio wave emission block intended to modify a satellite-based reception installation into a cheaper emission/reception installation. The emission block comprises a first input/output terminal and a second input/output terminal electrically linked to the first input/output terminal by way of a band rejection filter which rejects the intermediate emission frequency band. The invention also pertains to a tranmission device comprising a reception block coupled with the emission block.

 
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> Synchronisation in a receiver

> Shared frequency transmitter

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