Introduction: Lab Satellite Receiver Trainer is based on a modern and complete satellite receiver system consists of an external unit including: parabolic antenna, driven positioner, polarizer and LNB converter. This trainer is mounted in a sleek Anodized Aluminium cabinet defining a compact and functional set indicating the Block diagram of satellite Receiver in multicolour. Test points are provided on an easily accessible panel; the fault simulators are also provided in this trainer. The following objectives are explained in this trainer for the students to understand the complete working principles of satellite receiver system. Where it is useful Why it is used Reason of using high frequency for communications via Satellite Parts of dish antenna LNB mounting arrangement Faults due to dish antenna, co-axial cable, LNB Assembling the dish antenna Alignment of dish antenna Receiver circuit description. The block diagram of the Satellite Communication Receiver is printed on the front panel of the trainer. All necessary test points are provided to observe various signals at different stages. Controls like Vision IF, gain control, and volume control are provided on the trainer. Training Program: Direct TV signal broadcasting via satellite:orbital path, geostationary satellites, emitted power, covering map, transmission standard, coding systems. Functional diagram of a reception for TV satellites Components characteristics: parabolic antenna, illuminator, polarizer, LNB converter, motor-driven positioner, indoor unit, and positioner control Mounting and tracking of the parabolic antenna: "Azimuth-Elevation" mounting and "Polar" mounting Motor-driven positioner regulation Mounting and regulation of the circular and linear (horizontal and vertical) polarizer Mounting and tracking of the reception converter Tracking adjustment and memorization of satellite position Characteristics of the signal converted to intermediate frequency Audio/video decoders operation: wave-from analysis Video decoder programming Audio decoder programming Technical Specifications External Unit: Parabolic Antenna: polar mounting, 1.2 to 3.7m diameter(*), base mounted on self-holding structure Low noise converter Polarizer Positioner Cables 50m for IF and control Positioner and polarizer Dimensions: L=parabola diameter, H=1m + parabola ray Indoor unit Digital Satellite Receiver outputs: video, audio, RF Antenna Positioner control Structure: compact box with liftable cover with all the electronic parts, the test points, the fault simulator; and the block diagram of the circuit Fault simulator: various faults insertable by means of switches Test points; various test points mounted on panel and directly connected to the circuits of the equipment Power supply: 230 VAC, 50 Hz MAINS OPERATED. |
