Transportable ground receiving and recording equipment for 24-channel telemetry

The equipment receives telemetered data in the form of an r.f. carrier in the 400¿500 Mc/s range, amplitude-modulated by a frequency-modulated sub-carrier, using time-division multiplexing. The demodulated data is photographically recorded both in ¿histogram¿ form and as individually selected channel groups. The equipment is designed for operation as either a fixed or a self-contained transportable station. A mechanical selector switch using punched cards expedites selective recording of particular data channels.