Code: EML0023
AM transmitters and receivers course.
Including:
· 1 Experiment card with AM modulator/demodulator, AM modulator switchable between AM/DSB, product demodulator and diode detector
· 1 Experiment card with AM receiver and HF input stage
· 1 Experiment card with AM IF (intermediate frequency-), LF (low-frequency) amplifier
· CD-ROM with browser and course software
Course contents:
· Introduction to the design and function of Hartley- and Colpitts oscillators
· Tuning oscillators
· Introduction to principles of capacitive and inductive feedback
· Investigation of resonance conditions (self-excitation) by measurement
· Design and investigation of an AM transmitter
· Tuning an oscillator and measuring various degrees of modulation
· Measuring the frequency response of the output voltage of an oscillator
· Design and investigation of an AM receiver
· Introduction to the principle of receiver design
· Tuned radio frequency receivers
· Superhet receivers
· Automatic gain control AGC
· Automatic frequency control AFC
· Investigation of a phase discriminator (Foster-Seeley) by measurement
· Introduction to the terms signal-to-image ratio (far-off selectivity) with and without pre-selector stage
· Demonstration and determination of the image frequency in superhet receivers by measurement
· Investigation of filter curves of high-frequency input stages IF amplifiers by measurement
· Determination of adjacent-channel selectivity
· Design of a medium-wave AM single stage superhet receiver with full-range tuning
Course duration 4.5 h approx.