← All labs · EE-410L Communication Systems Lab · UMT · Fall 2026

Lab 10.
Frequency
Demodulation.

The same 3D IT-4103 trainer and bench as Lab 9, now used the other way round. Make an FM carrier with the varactor modulator, then get the audio back with the detuned resonant circuit, the quadrature detector and the phase locked loop, and compare what each one gives on the scope.

Read the concepts first →
IT-4103FM modulation / demodulation trainer
4 experiments10.7.1, 10.7.2, 10.7.3 and a PLL lock range extra
Section 10.7of the Lab 10 manual
Before you start

Your details

When you enter, your name, ID, section and network (IP) address are recorded for attendance. Your readings and report stay on this computer.

01
Read the concepts page: the slope detector, the quadrature detector, the phase locked loop and its lock and capture ranges.
02
Guided mode walks through every manual step and ticks it when the bench is really set.
03
Record readings and export a PDF sheet with scope and spectrum captures.
Designed by
Fasih Ullah Saleem