Instructions for SSBSC Modulation

  • Step 1: Click on 'Generate Message' button to generate input message signal
  • Step 2: Then click on 'Generate Carrier' button to generate carrier signal
  • Step 3: The carrier frequency has to be more than the message frequency and You can change frequencies using sliders
  • Step 4: Click on 'Generate Upper SSB-SC Signal' button to generate Generate Upper Sideband SSB-SC Signal
  • Step 5: Click on 'Generate Lower SSB-SC Signal' to generate Generate Lower Sideband SSB-SC Signal

CH1-A

CH2-A

AUDIO OSCILLATOR

SYNC

cos(wt)

TTL

sin(wt)

QUADRATURE PHASE SPLITTER

Y

KXY

Y

KXY

Multiplier

X

Y

KXY

Master Signals

100KHz sin

100KHz cos

100KHz TTL

sample TTL

message sin

PHASE SHIFTER

DC

GND

B

GA+gB

Multiplier

X

Y

KXY

ADDER

G:

1

A

g:

1

B

GA+gB

Message Frequency

10

Carrier Frequency:

100




Instructions for SSBSC Demodulation

  • Step 1: Click on 'Generate Recovered Message Signal(from USB SSB-SC)' button to generate message signal from Upper Sideband SSB-SC Signal
  • Step 2: Click on 'Generate Recovered Message Signal(from LSB SSB-SC)' button to generate message signal from lower Sideband SSB-SC Signal
  • Step 3: Click on the 'Show Frequency Spectrums' button to see spectrums of the message, modulated, and demodulated signal

CH1-A

IN

CH2-A

PHASE SHIFTER

DC

GND

B

GA+gB

Multiplier

X

Y

KXY

HEADPHONE AMPLIFIER

LPF SELECT

IN

OUT

LPF

K

A

KA

VCO

DATA

TTL

GAIN

fo

Vin

sin(wt)