WorldSpace is no longer operational. But I had a receiver lying around from when it was active. I opened it up and here is what I found in it: Antenna Unit Front Panel Inside of the front panel Main Board Mainboard with the various sections marked out STA001 – RF Frontend for Digital Radio Single chip receiver for satellite digital transmission Superheterodyne receiver with IF output High input intercept point, low Mixer noise 54db IF VGA gain range Adjustable RF gain Adjustable IF gain Integrated RF VCO Integrated IF VCO Integrated synthesizer I 2 C bus compatible programming Interface Unregulated 2.7 volts to 3.3 volts voltage Supply Low cost external components Block Diagram of STA001 – RF Frontend for Digital Radio STA002 – Starman Channel Decoder Front end interface IF input carrier frequency: f = 1.84 MHz Single internal 6 bit A/D converter QPSK demodulation Input symbol frequency: Fs = 1.84 Msymbols/s Digi...