MODULATIONS

The laboratory is equipped with modern, state-of-the-art devices manufactured by DEGEM (Israel). Eight identical workplaces, two students per one (16 workplaces in total), enable instruction on practical devices. Students are enabled to simultaneously verify the theory, as well as to measure and analyze the characteristics of system parameters. There are Practicums for hands-on lab exercises. On the present equipment, it is possible to realize 40-50 different three-hour exercises in commutation and commutation systems.

Lab exercises within Measurement course for the first year students are carried out in this lab. There is a Practicum workbook adapted for the beginners aiming to facilitate their work on each instrument and to help them acquire practical knowledge required for further work on measuring instruments. Special attention is devoted to the working conditions and the way a particular instrument is used on the basis of background knowledge about instrument specifications presented in the lab exercise. The Practicum provides the procedure for carrying out a lab exercise in several steps, each step being explained in details.

All results should be entered into the Practicum and presented in tables and graphs for better understanding and all signals should be precisely drawn and marked. In the second and third year of the studies, students do lab exercises within more professional courses such as Modulation, Wireless Transmission, etc. The lab exercises include amplitude modulation, oscillators, demodulation, frequency modulation and detection, SSB modulation…

All exercises are realized as explained in the Practicum which details the procedure for carrying out lab exercises in several steps. It also gives the list of instruments, probes and units from COM – 1 to COM – 7. In this lab it is possible to simultaneously configure eight commutation systems which can be connected two-by-two, enabling the realization of different types of connection in the system. The units have the same characteristics as the devices in the commutation and transmission systems, which contributes to better understanding of their functioning.

The lab for Modulation course is equipped with modular units placed in racks (up to three). The racks are charged from master board unit, one horizontal and one vertical at a time.
The modular approach enables various configurations of exercises. For example: frequency synthesizer can be used in any other COM unit which requires input clock signal.
The units in COM-6 series are used for testing signal sampling. They are modular and enable gradual digitalization and diagram recording at some points. First time students come into contact with multiple transmission and time channel division is during their work on the COM-6 units.

Phase Lock Loop unit is designed in hybrid technique, which enables the tracking of a signal at some points. Eight identical units provide modular approach, therefore they can be combined to configure various combinations and can be independently tested: VCO, phase comparator, phase detector, PLL.