The official newspaper of the Cuban Communist Party has warned Cubans against manufacturing or using illegal satellite TV dishes and aerials.
The paper highlighted the case of four men facing up to three years in prison for allegedly making home-made receivers to pick up foreign channels.
Cuba this week condemned a new US strategy of using Florida-based stations to beam TV Marti to Cuba.
Previously Cuba was able to jam most of TV Marti's anti-communist output.
Since December, TV Marti, funded by the US government, has been broadcast on stations in Florida which Cubans using illegal satellites can pick up.
The move has made TV Marti accessible to thousands of people on the island who never would have been able to see it before.
Non-US broadcast
By law, TV Marti is not allowed to broadcast propaganda inside the US.
However, anti-Castro groups believe the Florida stations can be used to transmit programmes as long as any viewing in the US is "inadvertent", the Associated Press news agency reported.
Cuba has a government-approved satellite TV service, but it is only available to resident foreigners, tourists and select officials, AP added.
Three of the men mentioned in the Granma newspaper article were reported to have been caught in a bicycle repair shop in Havana making illegal satellite dishes.
Another man was found with allegedly re-activated satellite receiver cards and dishes.
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