Based on the availability of broadband connections, the development of mobile technology provides to final users more and more services. One of these is remote teaching that gives the possibility to students to choose time and place to study. The learner can remotely interact with an actual experiment and real devices placed in any other part of the globe by simply using a common Personal Digital Assistant (PDA). In this paper an application of remote teaching that combines mobile technology and Field Programmable Gate Arrays (FPGA) is given. The experiment is performed on an existing e-learning laboratory allowing remote control of FPGA applications. Example of an automatic railway remotely controlled is shown.

The special generator of testing signal was designed for the frequency of 441.171 kHz. The generator consists of the special crystal oscillator and a high power amplifier. The frequency stability of the generator is in order of 10^-6/day, the output power 1W, the value of SINAD is close to 120 dB and the total harmonic distortion under -170 dB by using of linear narrow-band filter.

This paper presents both hardware and software of virtual system for conductivity measurement of electrolyte solution. The distinctive feature of the system is its application for the concentration control of an electrolyte solution component during microplasma oxidation process which is characterized by the conductivity in the range from 0.1 S/m to 30 S/m. The analyzer has virtual control panel and based on module measurement system of National Instrument PXI standard. Structure and main principles of constructing the system components are described. Its technical and metrological parameters are given.

The types of the structures of active electric power measuring channel and features of functions of measuring transformers in their configurations are considered. The universal mathematical model of measuring channel error, which takes into account influence of channel’s configuration, individual metrological performances of separate measuring devices, measuring operating conditions and the controlled electric network mode on its value, is developed. The example of application of the offered model is made.

The availability of in-home broadband services is not monopolized by a specific technology, but different technologies are currently available and used to deliver high speed data to the customers. This is plausible because the market did not favor a specific broadband technology over others, although wireless routers have been deployed most the last years. Nevertheless, powerline communications in house lately gained in importance, since this technology is easy to set-up and performs reasonably well under certain conditions, which will be treated in this paper. Hence, it would be common to find two or more broadband technologies operating in proximity of each other or at the same place. A concern has been raised lately by some service provides about the co-exitance of different technologies, and the possible opposing effects of one technology over others and vice-versa. In this paper, we discuss the co-existence between in-home broadband technologies focusing on Broadband Power Line (BPL) and x-Digital Subscriber Line (xDSL), mainly on VDSL2.