Lab Satellite Communication Receiver Trainer is highly advanced version. After studying this demonstrator the student will have thorough knowledge of Satellite Communication Receiver. The objectives of using this trainer are: 1. Where it is useful
2. Why it is used
3. The reason of using high frequency for communications via Satellite
4. Reception of down link signal frequencies
5. Parts of dish antenna
6. LNB mounting arrangement
7. Faults due to dish antenna, co-axial cable, LNB
8. Assembling the dish antenna
9. Alignment of dish antenna
10. 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.
DESCRIPTION OF SATELLITE RECEIVER The main function of receiver is to select a particular channel in the converted block of frequencies between 950-1450 MHz and separate the audio and video information. The audio and video cut sockets are provided at the back of the receiver. Generally, an internal modulator is incorporated in the receiver which modulates the audio and video information giving the modulated RF output . The receiver consists of the following stages: 1.Tuner
2. IF Stage
i LC Network
ii 70 MHz Filter
iii IF gain control
iv IF Amplifier 3. Detector + Amplifier
i. Frequency Demodulator
ii. Comparator
iii Low Pass Filter 4. Video Amplifier
i. High Pass Filter 5. Audio Detector 6. Audio Amplifier 7. Polarator Block 8. Power : 230V AC-MAINS OPERATED Lab Satellite Communication Trainer comes with detailed Instruction Manual, with step by step Procedure, dish antenna and colourTelevision receiver DIMENSION: Dish Antenna-6feet
Satellite Receiver Trainer -82cmsx19cmsx48cmx
Colour TV 20" with Remote Control SPECIFICATION OF COLOUR TV RECEIVER
1. Receiving System : CCIR B/G
2. Colour Receiving System PAL & NTSC-PLAY BACK
3. Receiving Channels VHF-Low :Ch 2-4
VHF-High :Ch 5-12
VHF :Ch 21-69
Tuner :Hyperband
4. Picture Tube : 53.5 cm, 90 degree Deflection
5. Antenna Input Impedance : 75 OHMS, Unbalanced
6. Speaker : 3" 5", 16 Ohms, 2 pcs
7. Sound Output : 30W PWPO
8. Audio/Video/Input/Output Terminals : Audio input/output. Level 500m Vrms Impedance 30 K Ohms Video Input/Output level 1.0V p-p, 75 Ohms Unbalanced (Composite Video Signal, Sync-negative)
9. Power Requirement : AC 220V, 50Hz (Regulation Range 160V to 270 AC)
10. Power Consumption : 80W (Max)
11. Remote Control : Volume, channel selection, MENU (Volume, Brightness, Contrast, Colour)
12. Controls : TV/AV ASAM (Auto search, Auto Memory) MENU (Brightness, Contrast, Colour) VOLUME PROGRAMME (Channel select) (These specifications are subject to change without notice)
(These specifications are subject to change without notice) |
