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OMEGA TYPE STC-24 Satellite Communication Training System is the first of its kind using actual techniques of satellite communication. It can uplink a given signal to a satellite link emulator, which can be stationed up to 100 feet away. The satellite will then re-transmit the same signal at a different frequency to a downlink station, which will receive the signal. Audio signal can be fed through a condenser microphone provided at Transmitter and reproduced on built-in loud-speaker at Receiver. Video signal can be sent from CCD camera and viewed on a video monitor provided with the system. Actual emulation of satellite communication link can be performed with emulation of path loss, propagation delay, noise, fading, etc.
Features:
* Microwave operation
* Tele-command and telemetry facility
* Manchester encoding & CRC error checking based PC-PC communication
* Emulation of signal fading, thermal noise
* Variable propagation delay.
* Variable path loss at two ends of uplink and downlink channels
* High RF output power and low noise
* Digital display of PLL synthesized frequency in Transmitter, Receiver and Satellite Emulator
* Condenser microphone and speaker provided for audio link
* Camera and monitor provided for video link
* Satellite emulator has built-in antennas, frequency transponder for communication link
* Helix (LHCP & RHCP), Yagi, Dish & Patch antennas provided for linear & circular polarization study
* Signal monitoring outputs at uplink & downlink
Satellite Uplinking Transmitter
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Frequency : PLL Controlled ISM Band
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Display : LCD 16X2 Backlit
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Spurious output : - 30 dB typical
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RF Output Z : 75 Ohms Unbalanced
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RF output level : +3 dBm nominal
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Path Loss : Upto 35dB variable attenuation
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Audio 1 : Int. 1KHz sine wave / Ext Mic Ext. Function Generator waveform
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Audio 2 : Int. 1KHz sine wave / Ext Mic Ext. Function Generator waveform
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Video : Colour/Monochrome Camera/VCD
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Waveform : upto 5MHz Function Generator
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Digital : Max bit rate 500KHz typical
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RS232 : PC serial port compatible encrypted input (19200, 8,N,1)
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Tele-command : Selectable 4 bit binary input with selectable 4 addresses
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Enable : Telecommand Frame available at digital input
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FM deviation : Variable onl audio and video/data
Satellite Downlink Receiver
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Frequency : PLL Controlled ISM Band
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Display : LCD 16 X 2 Backlit
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RF Input Z : 75 Ohms Unbalanced
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Sensitivity : -85dBm
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Path Loss : 20dB typical variable attenuation
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Audio 1out : Speaker inbuilt/output
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Audio 2 out : Speaker inbuilt/output
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Video Out : 5MHz bandwidth, 1V p/p
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Digital : Max bit rate 500KHz typical TTL
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Rs232 : PC serial port compatible decrypted output (9600, 8, N, 1)
Satellite Receiver
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Down-converter : 479.5 Mhz output for spectrum analysis
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Telemetry : 4 bit binary LED output with Selectable 4 addresses
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Valid/Error : Tele-command Frame available at Correction digital output
- RSSI Out : Received signal strength output for C/N measurement
Satellite Link Emulator
Transponder Uplink
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Frequency : 2.4, 2.427, 2.454 & 2.481 GHz PLL Synthesized ISM Band
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Display : 16X2 LCD Backlit
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RF Input Z : 75 Ohms Unbalanced
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Sensitivity : -85dBm
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Uplink Path Loss : 20dB typical variable attenuation
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Telemetry : 4 bit binary LED output with Selectable 4 addresses
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Valid/Error : Telemetry Frame available at Correction digital output Transponder Downlink
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Frequency : 2.4, 2.427, 2.454 & 2.481 GHz PLL Synthesized ISM Band
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Display : 16X2 LCD Backlit
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Spurious output : - 30 dB typical
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RF Output Z : 75 Ohms Unbalanced
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RF output level : +3 dBm nominal
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Path Loss : Upto 25dB variable attenuation
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Tele-command : Selectable 4 bit binary input with selectable 4 addresses
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Enable : Telecommand Frame available at digital input
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Test Output : Audio 1, Audio2, Video, Digital
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Down-converter : To spectrum analyzer 479.5 MHz
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RSSI Out : Received signal strength output for C/N measurement
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Band limiting : 18MHz fixed typical
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Noise addition : Variable
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Signal delay : upto
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Signal fading : Variable 10dB
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Antennas : Microstrip Yagi X2, Helix LHCP X2 & RHCP X2, Microstrip Patch X2, 25 cm dia Parabolic reflector with 0.25 f/d typical X2
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Mount : Antenna tripod mount X2
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Software : PC Serial communication software on CD
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Accessories : Camera, Microphone, monitor, Cables BNC-BNC X6, Tee connector X2, RS 232 Rx & Tx cables
List of Experiments:
* To set up an active & passive satellite communication link and study their difference. To study the advantages of satellite communication. To
study the communication satellite link design: process of transmitting a signal to a satellite (UPLINKING), reception of same signal via
satellite (DOWN LINKING) and functioning of transponder of a satellite.
* To measure the baseband analog signal parameters in a satellite link.
* To measure the signal parameters in an analog FM/FDMTV Satellite link.
* To study the functionality of a satellite MODEM.
* To study the phenomenon of Linear and Circular polarization of antennas.
* To measure the C/N ratio.
* To measure the S/N ratio.
* To study the effect of fading and measure the fading margin of a received signal.
* To measure the Propagation Delay of signal in a satcom link.
* To measure the digital baseband signal parameters in a satcom link. To measure the range of baud rates that the system can support.
* To send telecommand and receive the telemetry Data and study the operation of a codec
* To setup a RS-232 satellite communication link using RS 232 ports.
* To calculate Bit Error Rate in a satcom link.
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