1. Minimum Shift Keying 

2. MSK
Minimum shift keying, MSK, is a form frequency modulation, based on a system called continuous-phase frequency-shift keying.
Minimum shift keying (MSK) offers advantages in terms of spectral efficiency when compared to other similar modes, and it also enables power amplifiers to operate in saturation enabling them to provide high levels of efficiency.

3. MSK MODEL WAVEFORM

4. HARDWARE IMPLEMENTATION

5. PROCEDURE Generate PRBS data and clock pulses of 1.5 KHz.
Split the even and odd mode streams of PRBS data using splitter circuit which is shown in Figure

6. PROCEDURE
Using two function generators to generate 1:2 ratio frequency like 750Hz (fLow), 1.5KHz (fHigh) individually
The low frequency should have 90 degree phase shift while generation.
Use inverting op-amp for generating 180o phase shift of fLow and fHigh
From the splitter circuit, connect the odd and even streams (S0 and S1) to the address pins of 4051 (S0,S1)
From the op-amps and function generator, there will be 4 different inputs to the multiplexer. Like fLow and fHigh and their inverted phase.

7. PROCEDURE
Follow the table below and connect the inputs of multiplexer accordingly
The MSK O/P should be as shown in Figure. The waveform should have no kinks or discontinuities in the MSK waveform.

8. OUTPUT WAVEFORMS