The basic information about modern methods and means of measuring the parameters of telecommunication systems. Along with traditional electro-radio measurements, such as current measurements, Tension , capacity, frequency, Phase Shift, radio interference, Signal spectra, Components of Electrical Circuits , Measuring instruments are considered, designed for maintenance and operation of telecommunication systems. The training manual is intended for students studying in the specialty "Information security of telecommunication systems" . Will be useful for other areas of training and specialties, such as “Radio engineering”, “Radio-electronic systems”, “Means of communication with mobile objects”, “Communication networks and switching systems”. Recommended by the UrFU Methodological Council as a training manual for students studying in the specialty 090106 - Information security of telecommunication systems .