Satellite Communication Lab

Antenna / Satellite / Radar / RF Trainers / Mircowave Test Benches

Satellite Communication Lab Features:

• Microwave 2.4 GHz operation Satellite Trainer

• 500MHz spectrum analyser provided

• Tele-command and telemetry facility

• Different Baud rates PC-PC link.

• Emulation of variable signal fading, variable thermal noise

• Variable propagation delay.

• Total 4 Variable path loss at uplink and downlink channels

• High RF output power and low noise

• LCD display of PLL synthesized frequency in Transmitter,

• Receiver and Satellite Emulator

• Condenser microphone and speaker for audio link

• Camera and Video to VGA converter for video link

• Satellite has built-in antennas, transponder for link

• Helix (LHCP X 2 & RHCP X 2), Log Periodic X 2, Dish X 2 & Patch X 2 for linear & circular polarization study

• Signal monitoring outputs at uplink & downlink

• C/N and S/N measurement facility

 

Technical Specifications:

 

Satellite Uplinking Transmitter:

• Frequency :Frequency : 2.4, 2.427, 2.454 & 2.481 GHz PLL Synthesized ISM Band

• Display : LCD 16X2 Backlit Spurious output : 30 dB typical

• RF Output Z : 75 Ohms Unbalanced

• RF output level : +3 dBm nominal

• Path Loss : Upto 35dB variable attenuation

• Audio 1 : Int. 1KHz sine wave / Ext Mic Ext. Function Generator waveform

• Audio 2 : Int. 1KHz sine wave / Ext Mic Ext. Function Generator waveform

• Video : Colour/Monochrome Camera/VCD

• Waveform : upto 5MHz Function Generator

• Digital : Max bit rate 500KHz typical

• RS232 : PC serial port compatible intput

• Tele-command : Selectable 4 bit binary input with selectable 4 addresses

• Enable : Telecommand Frame available at digital input

• FM deviation : Variable on audio and video/data

 

Satellite Downlink Receiver:

• Frequency :2.4, 2.427, 2.454 & 2.481 GHz PLL Synthesized ISM Band

• Display : LCD 16 X 2 Backlit

• RF Input Z : 75 Ohms Unbalanced

• Sensitivity : -85dBm

• Path Loss : 20dB typical variable attenuation

• Audio 1out : Speaker inbuilt/output

• Audio 2 out : Speaker inbuilt/output

• Video Out : 5MHz bandwidth, 1V p/p

• Digital : Max bit rate 500KHz typical TTL

• Rs232 : PC serial port compatible output

• Down-converter : 400-500MHz output for spectrum analysis

• Telemetry : 4 bit binary LED output with Selectable 4 addresses

• 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:

• Frequency :2.4, 2.427, 2.454 & 2.481 GHz PLL

• Synthesized ISM Band

• Display : 16X2 LCD Backlit

• RF Input Z : 75 Ohms Unbalanced

• Sensitivity : -85dBm

• Uplink Path Loss : 20dB typical variable attenuation

• Telemetry : 4 bit binary LED output with Selectable 4 addresses

• Valid/Error : Telemetry Frame available at digital Correction output

 

Transponder Downlink:

• Frequency :2.4, 2.427, 2.454 & 2.481 GHz PLL Synthesized ISM Band

• Display : 16X2 LCD Backlit

• Spurious output : - 30 dB typical

• RF Output Z : 75 Ohms Unbalanced

• RF output level : +3 dBm nominal

• Path Loss : Upto 25dB variable attenuation

• Tele-command : Selectable 4 bit binary input with selectable 4 addresses

• Enable : Telecommand Frame available at digital input

• Test Output : Audio 1, Audio2, Video, Digital

• Down-converter : To spectrum analyzer 400-500 MHz

• RSSI Out : Received signal strength output for C/N measurement

• Band limiting : 18MHz fixed typical

• Noise addition : Variable

• Signal delay : upto 0.6s on Audio1 channel

• Signal fading : Variable 10dB

 

Spectrum Analyser:

• Frequency : 10 MHz – 500 MHz

• Center frequency : 4 digit LED display

• Accuracy : + 0.1%

• Resolution : 100KHz

• Sensitivity : -90dBm

• Attenuator : 20dB External

• Input Impedance : 50 Ohms (BNC)

• Horizontal scan : upto 50MHz/div continuous

• Center freq. : Variable control

• Dynamic range : 60dB typical

• CRO Output : Linear X out (BNC)

• : Log Y out (BNC)

• Antennas : Microstrip Log periodic X 2, Helix LHCP X 2 & Helix RHCP X 2, Microstrip Patch X 2, Parabolic Dish X 2

• Mount : Antenna mount X 2

• Software : PC Serial communication software

• Accessories : Camera, Microphone, Video to VGA converter Card, Cables BNCBNC X6, Tee connector X2, RS 232 Rx & Tx Cables

 

Dimensions: 58X52X44cms Weight: 22Kgs

 

Area & Scope 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.

• To measure baseband analog signal parameters.

• To measure the signal parameters like fm deviation in an analog FM/FDMTV Satellite link on spectrum analyser.

• To study the functionality of a satellite MODEM.

• To measure Linear and Circular polarization of antennas on spectrum analyser.

• To measure the C/N ratio, threshold on spectrum analyser.

• To measure the S/N ratio.

• To study the effect of fading and measure the fading margin of a received signal on spectrum analyser.

• To measure the Propagation Delay of signal.

• To measure pathloss using spectrum analyser.

• To study noise on spectrum analyser.

• 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 com ports of PC.

• To calculate Bit Error Rate in a satcom link.

 

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