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EXPERIMENT NO. 8

OBJECTIVE:To establish a direct communication link between Uplink transmitter and

Downlink receiver using tone signal.

APPARATUS NEEDED:

Uplink Transmitter

Downlink Receiver

Dish antennas

Connecting cables.

THEORY:

To radiate or receive electromagnetic waves an antenna is required.Antenna is system of elevated conductors which couples or matches thetransmitter or receiver to free space. A transmitting antenna connectingto a transmitter by transmission line, forces electromagnetic waves in to

free space which travel in space with velocity of light.

PROCEDURE:

1. Connect the satellite uplink transmitter to AC mains.2. witch on the transmitter by mains switch and frequency display willcome on.!. The transmitting frequency can be selected by up "down switch. Thefrequency can be changed from 12## $12%#$1!## &'(.). The transmitter on "o* switch will switch on "o* the transmission.%. Connect +1 antenna to uplink transmitter with -C "-C cable.. et the o/p gain of uplink transmitter to ma0imum.. lace downlink receiver at a distance of %$ m.3. Connect the downlink receiver to the AC mains and switch it on bymains switch.4. The downlink receiver frequency can be changed from 11## $11%#$12## &'(.1#. The downlink receiver also has tuning potentiometer, which can beused to tune any frequency from 4%#$ 1%## &'(.11. 5eep the tuning 6T fully anticlockwise.12. The downlink receiver on "o* switch will switch on "o* the receiver.1!. Attach 72 antenna to the downlink receiver with -C "-C cables.1). Align both the transmitter and receiver antenna in line.1%. 5eep the uplink transmitter frequency to 12## &'(.1. 5eep the downlink receiver frequency to 12## &'(.

1. -ow connect Tone out signal to tone input of the uplink transmitter bypatch cord.

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13. 5eep downlink receiver voice switch in the on position and you will beable to hear tone in the speaker of receiver.14. This is a test link for direct communication between transmitter andreceiver.2#. Connect any other audio signal to the Audio2 of uplink transmitter and

you will hear the music in the speaker of downlink receiver.

RESULT:

A clear music indicates that the microwave link has been successfully setup between 8plink transmitter and :ownlink receiver.

DISCUSSION:

:irect Communication link is established without using satellite as atransponder.

PRECAUTIONS:

1. Connection should be tight.2. witch o* power supply after performing the e0periment.

EXPERIMENT NO. 9

OBJECTIVE: To setup an Active satellite link and demonstrate link fail operation.

APPARATUS NEEDED; 8plink Transmitter

:ownlink 7eceiver

:ish antennas

Transponder

Connecting cables

THEORY:

The 8plink transmitter sends signals at an uplink frequency,which ishigher than downlink frequency to avoid the interference. The quality of

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signal is much improved with active satellite specially when distancesbetween transmitter and receiver are considerable.

BLOCK DIAGRAM:

PROCEDURE:

1. Connect the satellite uplink transmitter to AC mains.2 .witch on the transmitter by mains switch and frequency display willcome on.! .The transmitting frequency can be selected by up "down switch. Thefrequency can be changed from 12## $12%#$1!## &'(.). The transmitter on "o* switch will switch on "o* the transmission.Connect +1 antenna to uplink transmitter with -C "-C cable.%. et the o/p gain of uplink transmitter to ma0imum.lace downlink receiver at a distance of %$ m.. Connect the downlink receiver to the AC mains and switch it on bymains switch.. The downlink receiver frequency can be changed from 11## $11%#$12## &'(.3. The downlink receiver also has tuning potentiometer, which can beused to tune any frequency from 4%#$ 1%## &'(.

4. 5eep the tuning 6T fully anticlockwise.1#. The downlink receiver on "o* switch will switch on "o* the receiver.11. Attach 72 antenna to the downlink receiver with -C "-C cables.12. Align both the transmitter and receiver antenna in line.1!. lace a satellite transponder between transmitter and receiver at adistance of %$m.1). Connect the satellite transponder to the AC mains and switch it on bymains switch.1%. The receiver side of satellite Transponder has an on "o* switch, whichwill switch o* the receiver of the satellite. imilarly on "o* switch ontransmitter side will switch o* transmitter of satellite.

1. Ad

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RESULT:

The above set up shows that a successful satellite communication link hasbeen set up between transmitter and receiver.

PRECAUTIONS:

1. Connection should be tight.2. witch o* power supply after performing the e0periment.

EXPERIMENT NO.10

OBJECTIVE: To establish an AUDI!"ID# satellite link between Transmitter and

Receiver.

APPARATUS NEEDED;

8plink Transmitter

:ownlink 7eceiver

:ish antennas Transponder

&onitor

Connecting cables

THEORY;The 8plink transmitter sends signals at an uplink frequency, which ishigher than downlink frequency to avoid the interference. The quality ofsignal is much improved with active satellite specially when distancesbetween transmitter and receiver are considerable.

BLOCK DIAGRAM:

PROCEDURE:

1. Connect the satellite uplink transmitter to AC mains.$. %witch on the transmitter b& mains switch and fre'uenc& displa& will come on.

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(. The transmitting fre'uenc& can be selected b& up )down switch. The fre'uenc& can be

changed from *$++ !*$,+!*(++ -/.

0. The transmitter on )off switch will switch on )off the transmission.

,. Connect 1* antenna to uplink transmitter with 23C )23C cable.

4. %et the o5p gain of uplink transmitter to ma6imum.

7. 8lace downlink receiver at a distance of ,!7 m.9. Connect the downlink receiver to the AC mains and switch it on b& mains switch.

. The downlink receiver fre'uenc& can be changed from **++ !**,+ !*$++ -/.

*+. The downlink receiver also has tuning potentiometer; which can be used to tune an&

fre'uenc& from ,+! *,++-/.

**.

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APPARATUS NEEDED: 8plink Transmitter

:ownlink 7eceiver

:ish antennas

Transponder

&icrophone

Connecting cables

THEORY:The 8plink transmitter sends signals at an uplink frequency which ishigher than downlink frequency to avoid the interference. The quality ofsignal is much improved with active satellite specially when distancesbetween transmitter and receiver are considerable.

BLOCK DIAGRAM:

PROCEDURE:

1. Connect the satellite uplink transmitter to AC mains.2. witch on the transmitter by mains switch and frequency display willcome on.!. The transmitting frequency can be selected by up "down switch. Thefrequency can be changed from 12## $12%#$1!## &'(.). The transmitter on "o* switch will switch on "o* the transmission.%. Connect +1 antenna to uplink transmitter with -C "-C cable.. et the o/p gain of uplink transmitter to ma0imum.. lace downlink receiver at a distance of %$ m.3. Connect the downlink receiver to the AC mains and switch it on bymains switch.4. The downlink receiver frequency can be changed from 11## $11%#

$12## &'(.1# The downlink receiver also has tuning potentiometer, which can beused to tune any frequency from 4%#$ 1%## &'(.11. 5eep the tuning 6T fully anticlockwise.12. The downlink receiver on "o* switch will switch on "o* the receiver.1!. Attach 72 antenna to the downlink receiver with -C "-C cables.1). Align both the transmitter and receiver antenna in line.1%. lace a satellite transponder between transmitter and receiver at adistance of %$m.1. Connect the satellite transponder to the AC mains and switch it on bymains switch.

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1. The receiver side of satellite Transponder has an on "o* switch, whichwill switch o* the receiver of the satellite. imilarly on "o* switch ontransmitter side will switch o* transmitter of satellite.13. Ad

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The 8plink transmitter sends signals at an uplink frequency, which ishigher than downlink frequency to avoid the interference. The quality ofsignal is much improved with active satellite specially when distancesbetween transmitter and receiver are considerable.

PROCEDURE:

1. Connect the satellite uplink transmitter to AC mains.2. witch on the transmitter by mains switch and frequency display willcome on.!. The transmitting frequency can be selected by up "down switch. Thefrequency can be changed from 12## $12%#$1!## &'(.). The transmitter on "o* switch will switch on "o* the transmission.%. Connect +1 antenna to uplink transmitter with -C "-C cable.. et the o/p gain of uplink transmitter to ma0imum.. lace downlink receiver at a distance of %$ m.3. Connect the downlink receiver to the AC mains and switch it on by

mains switch.4. The downlink receiver frequency can be changed from 11## $11%#$12## &'(.1#. The downlink receiver also has tuning potentiometer, which can beused to tune any frequency from 4%#$ 1%## &'(.11. 5eep the tuning 6T fully anticlockwise.12. The downlink receiver on "o* switch will switch on "o* the receiver.1!. Attach 72 antenna to the downlink receiver with -C "-C cables.1). Align both the transmitter and receiver antenna in line.1%. lace a satellite transponder between transmitter and receiver at adistance of %$m.

1. Connect the satellite transponder to the AC mains and switch it on bymains switch.1. The receiver side of satellite Transponder has an on "o* switch, whichwill switch o* the receiver of the satellite. imilarly on "o* switch ontransmitter side will switch o* transmitter of satellite.13. Ad6 signal at the i/p socket provided on theuplink transmitter, =ideo at video input audio at audio 1 input.22. Connect T= monitor to the Audio/=ideo o/p of downlink receiver. etT= in A= mode.2!. The T= monitor will display video and audio signal that you haveconnected to uplink transmitter i/p.2). -ow change uplink transmitter frequency from 1!## to 12%# &'( andcorrespondingly the receiver frequency of transponder is to be changed to12%# &'( you will receive the same quality of signal at the o/p of theuplink receiver.2%. -ow change the downlink frequency of transponder from 11## to 11%#&'( and similarly change downlink receiver tuning frequency to 11%#

&'(. you will be receiving the same quality of signal. Try di*erent

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combinations of uplink and downlink frequency and also by using tuner ofreceiver.2. ?hen the transmitter and receiver both are 12##&'(. you will see thedistortion on monitor because both uplink and downlink frequency aresame and receiver is receiving two links.

RESULT:The above shows a successful establishment of satellite audio/video linkbetween uplink transmitter and downlink receiver at di*erent uplink anddownlink frequencies.

DISCUSSION:?hen the transmitter and receiver both are 12##&'(, you will see thedistortion on monitor.

PRECAUTIONS;1. Connection should be tight.2. witch o* power supply after performing the e0periment.

EXPERIMENT NO.13

OBJECTIVE:To transmit and receive three separate signals >Audio; "ideo; Tone?simultaneousl& through satellite link.

APPARATUS NEEDED:

8plink Transmitter

:ownlink 7eceiver

:ish antennas

Transponder

=C: layer

&onitor and connecting cables.

THEORY;

The 8plink transmitter sends signals at an uplink frequency, which ishigher than downlink frequency to avoid the interference. The quality ofsignal is much improved with active satellite specially when distancesbetween transmitter and receiver are considerable.

BLOCK DIAGRAM:

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PROCEDURE:

1. Connect the satellite uplink transmitter to AC mains.2. witch on the transmitter by mains switch and frequency display willcome on.

!. The transmitting frequency can be selected by up "down switch. Thefrequency can be changed from 12## $12%#$1!## &'(.). The transmitter on "o* switch will switch on "o* the transmission.%. Connect +1 antenna to uplink transmitter with -C "-C cable.. et the o/p gain of uplink transmitter to ma0imum.. lace downlink receiver at a distance of %$ m.3. Connect the downlink receiver to the AC mains and switch it on bymains switch.4. The downlink receiver frequency can be changed from 11## $11%#$12##&'(.1#. The downlink receiver also has tuning potentiometer, which can beused to tune any frequency from 4%#$ 1%## &'(.11. 5eep the tuning 6T fully anticlockwise.12. The downlink receiver on "o* switch will switch on "o* the receiver.1!. Attach 72 antenna to the downlink receiver with -C "-C cables.1). Align both the transmitter and receiver antenna in line.1%. lace a satellite transponder between transmitter and receiver at adistance of %$ m.1. Connect the satellite transponder to the AC mains and switch it on bymains switch.1. The receiver side of satellite Transponder has an on "o* switch, which

will switch o* the receiver of the satellite. imilarly on "o* switch ontransmitter side will switch o* transmitter of satellite.13. Ad6 signal at the i/p socket provided on theuplink transmitter, =ideo at video input audio at audio 1 input. Andconnect tone out signal to Audio 2 input of the uplink transmitter by patchcord.22. Connect T= monitor to the Audio/=ideo o/p of downlink receiver. et

T= in A= mode. 5eep downlink receiver voice switch in the on position.2!. The T= monitor will display video and audio signal that you haveconnected to uplink transmitter i/p.and you will be able to hear tone in thespeaker of receiver.

RESULT:Three separate signals @Audio, =ideo, Tone are successfully received atdownlink receiver through satellite communication link.

PRECAUTIONS;1. Connection should be tight.2. witch o* power supply after performing the e0periment.

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EXPERIMENT NO.1

OBJECTIVE:To transmit and receive function generator waveforms through satellite link.

APPARATUS NEEDED;

8plink Transmitter

:ownlink 7eceiver :ish antennas

Transponder

Bunction generator

C76

Connecting cables

THEORY;The 8plink transmitter sends signals at an uplink frequency which ishigher than downlink frequency to avoid the interference. The quality of

signal is much improved with active satellite specially when distancesbetween transmitter and receiver are considerable.

BLOCK DIAGRAM:

PROCEDURE:1. Connect the satellite uplink transmitter to AC mains.2. witch on the transmitter by mains switch and frequency display willcome on.!. The transmitting frequency can be selected by up "down switch. Thefrequency can be changed from 12## $12%#$1!## &'(.). The transmitter on "o* switch will switch on "o* the transmission.%. Connect +1 antenna to uplink transmitter with -C "-C cable.. et the o/p gain of uplink transmitter to ma0imum.. lace downlink receiver at a distance of %$ m.3. Connect the downlink receiver to the AC mains and switch it on by

mains switch.

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4. The downlink receiver frequency can be changed from 11## $11%#$12## &'(.1#. The downlink receiver also has tuning potentiometer, which can beused to tune any frequency from 4%#$ 1%## &'(.11. 5eep the tuning 6T fully anticlockwise.

12. The downlink receiver on "o* switch will switch on "o* the receiver.1!. Attach 72 antenna to the downlink receiver with -C "-C cables.1). Align both the transmitter and receiver antenna in line.1%. lace a satellite transponder between transmitter and receiver at adistance of %$m.1. Connect the satellite transponder to the AC mains and switch it on bymains switch.1. The receiver side of satellite Transponder has an on "o* switch, whichwill switch o* the receiver of the satellite. imilarly on "o* switch ontransmitter side will switch o* transmitter of satellite.13. Ad

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8plink Transmitter

:ownlink 7eceiver

:ish antennas

Transponder

2 7$2!2 4$pin cables 2 &ale to Bemale 7 $2!2 cable

2 sets of C

atellite software and connecting cables.

THEORY;The 8plink transmitter sends signals at an uplink frequency, which ishigher than downlink frequency to avoid the interference. The quality ofsignal is much improved with active satellite specially when distancesbetween transmitter and receiver are considerable.

BLOCK DIAGRAM:

PROCEDURE:

1.Connect the satellite uplink transmitter to AC mains.2. witch on the transmitter by mains switch and frequency display willcome on.!. The transmitting frequency can be selected by up "down switch. Thefrequency can be changed from 12## $12%#$1!## &'(.). The transmitter on "o* switch will switch on "o* the transmission.%. Connect +1 antenna to uplink transmitter with -C "-C cable.. et the o/p gain of uplink transmitter to ma0imum.. lace downlink receiver at a distance of %$ m.3. Connect the downlink receiver to the AC mains and switch it on bymains switch.4. The downlink receiver frequency can be changed from 11## $11%#

$12## &'(.1#. The downlink receiver also has tuning potentiometer, which can beused to tune any frequency from 4%#$ 1%## &'(.11. 5eep the tuning 6T fully anticlockwise.12. The downlink receiver on "o* switch will switch on "o* the receiver.1!. Attach 72 antenna to the downlink receiver with -C "-C cables.1). Align both the transmitter and receiver antenna in line.1%. lace a satellite transponder between transmitter and receiver at adistance of %$m.1. Connect the satellite transponder to the AC mains and switch it on bymains switch.

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1. The receiver side of satellite Transponder has an on "o* switch, whichwill switch o* the receiver of the satellite. imilarly on "o* switch ontransmitter side will switch o* transmitter of satellite.13. Ad