Satellite communication uses artificial satellites to provide communication links between single or various points on earth. It plays a vital role in the global telecommunication system. Digital satellite communication can be defined as a system through which data transmission and television services are delivered using the Internet protocol suite over a packet-switched network instead of being delivered through traditional terrestrial, satellite signal, and cable television formats.

10203C is a experimental platform with unique features, which provide a practical approach to understand the concepts of digital satellite communication system. It offers opportunity for in depth practical learning of digital satellite communication system blocks like, digital video transmission, forward error correction encoder and decoder, baseband modulator and demodulator, RF up convertor and RF down convertor, transponder, antenna directivity, etc.

10203C is designed to learn modern telecommunications technologies using a fully operational digital satellite communication training system link.

Features

1. Transmitting & receiving digital audio/video signals via IP router using UDP streaming
2. Ethernet port for PC communication
3. Supports direct & satellite link
4. Dual 500 MSPS 16-bit D/A converters for I channel and Q channel
5. Control setting for individual blocks
6. Built in real time software
7. Baseband signal analysis of I & Q channel
8. Built-in RF-up & RF down converters
9. Built-in low-noise frequency synthesizer
10. Detachable directive dish antenna at each station
11. Internal test data mode for BER concept
12. Portable design
13. User configurable RF frequency range, from 400 MHz – 3 GHz

Object

1. Complete practical understanding of end to end video transmission link between transmitter and receiver.                                                                                                                                                      Learning : Understand the complete flow of line of sight video transmission.
2. Complete practical understanding of end to end audio transmission link between transmitter and receiver.                                                                                                                                                      Learning : Understand the complete flow of line of sight audio transmission.
3. Practical realization of base-band modulation & demodulation.                                                                                                                                                                                                                                Learning : Study                                                                                                                                                                                                                                                                                                Types of digital base-band modulation like BPSK and QPSK.                                                                                                                                                                                                                                  Data rate during internal data mode.                                                                                                                                                                                                                                                                        I-Q modulated signal in time and frequency domain.
4. To perform the bit error rate measurement using Internal test data mode.                                                                                                                                                                                                     Learning : Observe                                                                                                                                                                                                                                                                                   Synchronization and BER measurement at the receiver end.                                                                                                                                                                                                                                   I-Q digital symbols.
5. Understanding carrier to noise ratio (C/N).                                                                                                                                                                                                                                                  Learning : Measure the C/N using spectrum analyzer.

Technical Specifications

Ground station transmitter

Connectivity

• IP router (10/100Mbps)

Protocol

• UDP streaming
• A CRC is attached to each transmitted IP packet for error detection at the receiving end. 1-bit
• serial streams are HDLC encoded and scrambled.
• Supports audio and video standards format Forward error correction with variable rate and data scrambling

Baseband modulation

• PSK

I & Q channel DAC & analog filter

Resolution

• 16-bit per channel

Sampling frequency

• 500 Msamples/s

Analog LPF 3dB bandwidth

• +/- 13MHz

RF frequency band

• 400MHz –3 GHz

Transponder

RF Frequency band

• 400 MHz - 3 GHz RF up converter
• 400 MHz - 3 Ghz RF down converter

Ground station receiver

Connectivity

• IP router (10/100Mbps)

Protocol

• UDP streaming supports audio and video standards format
• Forward error correction with variable rate and data scrambling

Baseband de-modulation

• PSK

RF frequency band

• 400 MHz - 3 GHz RF receiver