lab@motestainstruments.com | Civil and Mechanical Engineering Lab Equipments India China
lab@motestainstruments.com | Civil and Mechanical Engineering Lab Equipments India China
Code: EML0022
AM/FM modulation course.
Including:
· 1 Experiment card with Colpitts/Hartley oscillator
· 1 Experiment card with AM modulator/demodulator, AM modulator switchable between AM/DSB, product demodulator and diode detector
· 1 Experiment card with FM modulator/phase demodulator
CD-ROM with browser and course software
Course contents:
· Introduction to the principle of amplitude modulation by measuring AM modulator signals over time
· Recording the modulation trapezoid for various modulation depths
· Demodulation of an amplitude modulated signal
· Introduction to the principle of a diode detector
· Demonstration of double side-band modulation (DSB)
· Tuning the modulator to minimise residual carrier
· Recording signal, phase shift and modulation trapezoid for DSB
· Demonstration of single side-band modulation (SSB)
· Recovery of the original signal from an SSB signal with the help of an integrated double balanced mixer
· Demonstration of the principle of frequency modulation and demodulation
· Explanation of the term "instantaneous frequency" for a modulated signal
· Determination of the maximum frequency deviation in an FM signal
· Effect of low-frequency amplitude and
· frequencies on an FM signal
· Explanation of the modulation index
· Explanation of the relationship between LF amplitude, LF frequency and phase shift
· Ratio detector and phase detector (Foster-Seeley)
· Recovery of a modulated signal by a phase demodulator
Course duration 3 h approx.
