Binary Amplitude Shift Keying 6m353n

DAR ES SALAAM INSTITUTE OF TECHNO2 (DIT)

DEPARTMENT OF ELECTRONICS AND TELECOMMUNICATION ETU 07314: DIGITAL COMMUNICATION LABORATORY LABORATORY TASK 2 BINARY AMPLITUDE SHIFT KEYING

Digital Communication Laboratory

Binary Amplitude Shift Keying Aim Perform Binary amplitude shift keying. Tool provided Simulation software Binary Amplitude Shift Keying circuit Theory Binary Amplitude Shift Keying (BASK) or On Off Keying (OOK) is one of the digital modulation techniques in which the amplitude of carrier is switched according to the binary data.

Fig 1: Amplitude Shift Keying Signal Circuit Diagram

Fig 2: Binary amplitude shift keying Circuit

Digital Communication Laboratory

Procedures 1. The circuit is connected as per the circuit diagram shown in fig 2. 2. Apply the carrier signal of approximately 10V (p-p) at 2kHz frequency and binary signal of 10V (p-p) with frequency 300Hz. What is your observation? 3. Observe on the BASK modulation signal by changing the frequency of carrier signal to 3 kHz, 4kHz, 5kHz, 6KHz, 7KHz. (Binary signal is kept constant at 300Hz) 4. Observe on the BASK modulation signal by changing the frequency of Binary signal to 100, 400,600Hz, 700Hz, 800Hz (carrier signal is kept constant at 2kHz). 5. What is your observation when  Carrier frequency is greater than binary signal.  Carrier frequency is less than binary signal.

Digital Communication Laboratory

: IT IS YOUR RESPONSIBILITY TO KEEP A RECORD OF ALL WORK SUBMITTED.

Digital Communication Laboratory