Emission/reception installation of hyperfrequency radioelectrical satellite signals comprising: - a reflector suited to receive and emit hyperfrequency radi-oelectrical signals; - an emission/reception unit comprising: ∘ a low noise block LNB down converter suited to: ▪ transform radioelectrical signals into electrical signals in a first frequency band greater than 10 GHz concentrated by the reflector; ▪ amplify the electrical signals in the first frequency band; ▪ lower the first frequency band towards a first intermediate frequency band; ∘ an emitter suited to: ▪ raise frequency of electrical signals from a second intermediate frequency band having no common frequency with the first intermediate frequency band towards a second frequency band; ▪ amplify the electrical signals; ▪ transform into radioelectrical signals the amplified electrical signals in the second frequency band; ▪ transmit the radioelectrical signals in the second frequency band towards the reflector; - a box including a modulator suited to modulate electrical signals in the second intermediate frequency band; - a coaxial cable connecting the emission/reception unit and the box suited to: ∘ convey the electrical signals in the second intermediate frequency band from the box towards the emission/reception unit; ∘ convey the electrical signals in the first intermediate frequency band from the emission/reception unit towards the box; said installation being characterized in that the box further includes an output suited to transmit towards a decoder electrical signals in the first intermediate frequency band and in that the second frequency band is the S band or the C band. - a reflector suited to receive and emit hyperfrequency radi-oelectrical signals; - an emission/reception unit comprising: ∘ a low noise block LNB down converter suited to: ▪ transform radioelectrical signals into electrical signals in a first frequency band greater than 10 GHz concentrated by the reflector; ▪ amplify the electrical signals in the first frequency band; ▪ lower the first frequency band towards a first intermediate frequency band; ∘ an emitter suited to: ▪ raise frequency of electrical signals from a second intermediate frequency band having no common frequency with the first intermediate frequency band towards a second frequency band; ▪ amplify the electrical signals; ▪ transform into radioelectrical signals the amplified electrical signals in the second frequency band; ▪ transmit the radioelectrical signals in the second frequency band towards the reflector; ∘ a low noise block LNB down converter suited to: ▪ transform radioelectrical signals into electrical signals in a first frequency band greater than 10 GHz concentrated by the reflector; ▪ amplify the electrical signals in the first frequency band; ▪ lower the first frequency band towards a first intermediate frequency band; ▪ transform radioelectrical signals into electrical signals in a first frequency band greater than 10 GHz concentrated by the reflector; ▪ amplify the electrical signals in the first frequency band; ▪ lower the first frequency band towards a first intermediate frequency band; ∘ an emitter suited to: ▪ raise frequency of electrical signals from a second intermediate frequency band having no common frequency with the first intermediate frequency band towards a second frequency band; ▪ amplify the electrical signals; ▪ transform into radioelectrical signals the amplified electrical signals in the second frequency band; ▪ transmit the radioelectrical signals in the second frequency band towards the reflector; ▪ raise frequency of electrical signals from a second intermediate frequency band having no common frequency with the first intermediate frequency band towards a second frequency band; ▪ amplify the electrical signals; ▪ transform into radioelectrical signals the amplified electrical signals in the second frequency band; ▪ transmit the radioelectrical signals in the second frequency band towards the reflector; - a box including a modulator suited to modulate electrical signals in the second intermediate frequency band; - a coaxial cable connecting the emission/reception unit and the box suited to: ∘ convey the electrical signals in the second intermediate frequency band from the box towards the emission/reception unit; ∘ convey the electrical signals in the first intermediate frequency band from the emission/reception unit towards the box; ∘ convey the electrical signals in the second intermediate frequency band from the box towards the emission/reception unit; ∘ convey the electrical signals in the first intermediate frequency band from the emission/reception unit towards the box;