BASIC BLOCK DIAGRAM OF A COMMUNICATION SYSTEM
Message/Intelligence
Transmitter
Communication Channel
Receiver
Output
BLOCK DIAGRAM OF A WIRELESS COMMUNICATION SYSTEM:
Message/Data
Transducer
AF Amplifier
Modulator
RF Amplifier
Transmitting Antenna
Power Amplifier
Receiving Antenna
RF Amplifier
Output Device
IF Amplifier
Demodulator
DIGITAL TRANSMISSION:
Message source
Signal Transmission Encoder
Modulator
Communication Channel
Detector
Signal Transmission Decoder Estimate m
RADIO BROADCAST:Transmitting Antenna Studio Amplifier Modulator
(Carrier) Transmitter
Micro Phone
Modulated Carrier
Receiving Antenna Sound Wave
Speaker
AM TRANSMITTER:RF Intermediate Amplifier
Crystal Oscillator
RF Buffer Amplifier
RF Output Power Amplifier
AF Amplifier
Modulator
FM TRANSMITTER:
Reactance Tube Modulator
LC Oscillator
Frequency Multiplier
Power Amplifier
Low-Pass Filter
Radio Detector
Mixer
Local Oscillator
Crystal Oscillator
Phase Modulator
Frequency Multiplier
Power Amplifiers
Frequency Multiplier
Power Amplifiers
RADIO RECEIVERS: AntennaSelection RF Amplification Detection AF
Amplification
Speaker
TRF RECIEVER:Antenna 1st RF Amplifier 2nd RF Amplifier Power
Amplifier
Detector
AF Amplifier
AM RECEIVER:
RF Amplifier
Mixer
IF Amplifier
AM Detector
Audio Driver
Power Amplifier
Local Oscillator
FM RECEIVER:
RF Amplifier
Mixer
IF Amplifier
Limiter
Discriminat or
Deemphasis
Audio Amplifier
Local Oscillator AGC AGC Detector
TELEVISION RECEIVER:Sound IF Amplifier Receiving Antenna
Deflection Coils RF Tuners & Amplifier IF Amplifie Video
Detector Video Amplifier Picture tube FM Modulator Audio Amplifier
Speaker
Scanning & Synchronizing Circuits
TELEVISION TRANSMITTER:
Carrier Oscillator
RF Amplifier
Power Amplifier
Antenna
Scanning & Synchronizing Circuits
Combining Network AM Modulator
TV Camera
Video Amplifier
Audio Amplifier Microphone
FM Modulator
FM Audio Transmitter
COLOR TV RECEIVER:Antenna Sound IF and Decoder Audio Amplifier
Loud Spea
RF Tuner
Video IF
Video detector &AGC
Video Amplifier
Color Sync
CHROM A
Sync Pulses
Deflectio Circuit
EHT
FAX (FACSIMILE)Input document Output document
Scanning
Printing
Compression
Decompression
Transmission
reception
Transmitter
Receiver
FACSIMILE TRANSMISSION:Photo cell Motor Amplifier Rectifier
Reactance Tube Mixer
Chopper Disc Lamp
Mask aperture Lamp Optical lenses Reflecting mirror
Local Oscillator
Rotation
Transmitter drum
Axial movement
DIGITAL MICROWAVE SYSTEMS: RF CarrierDigital Source Transmitte r
TWT Amplifier TWT Amplifier Transmitte r Digital Source
Duplexer Digital Sink Receiver
Duplexer TWT Amplifier Receiver Digital Sink
TWT Amplifier
SATELLITE:
Power Subsystem
Solar panels
Charger and Batteries
Regular Protection & Conditioning
DC/DC Converters DC/AC Inverters
Receiver
Frequency Translator
Transmitt er Attitude Control Subsystem
Telemetry Tracking &Control
Propulsion Subsystem
EARTH STATION:
LNA BPF LO
BPF Demodulator
Diplexer
Modulator
LO
LO Local Oscillator BPF Band pass filter LNA Low Noise Amplifier
HPA High Power Amplifier MUX Multiplier, DEMUX- Demultiplexer
BASIC FIBER OPTIC COMMUNICATION SYSTEM:
Information input
Coder or converto
Light Source Transmitter
Shaper
Decoder
G.SHATHISH 1ST YEAR B.E. PRODUCTION ENGINEERING BASIC ELECTRICAL
AND ELECTRONICS ENGINEERING ASSIGNMENT
