Austria Theory AM study guide
Austria Theory AM · Work through your exam, one topic at a time.
This page introduces the Austrian amateur radio theory examination for licence class A, the higher of the two Austrian amateur radio certificate classes. Class A candidates are expected to demonstrate solid technical understanding alongside a firm grasp of the operating rules that govern amateur stations, which makes the theory paper the demanding part of the path for many candidates. The Austria Theory AM study guide has 4 sections and about 1,257 words.
01Radio Regulations and Operating Rules (Austrian Theory AM)
Every licence candidate must master the legal framework: the ITU Radio Regulations, the Austrian Telecommunications Act (TKG) and the implementing ordinance on amateur radio, the class privileges of the Austrian licence classes, the frequency bands and their permitted power levels, the call-sign structure (prefix OE, district digits, suffixes for special stations), identification rules, third-party traffic, and the ban on broadcasting and on commercial use. Know the definitions of amateur service and amateur-satellite service, the meaning of primary and secondary allocation, and the obligation to avoid and resolve interference.
329 words, about 2 min02Electrical Engineering, Electronics and Radio Theory
This domain covers DC and AC circuit theory, Ohm's and Kirchhoff's laws, series and parallel combinations, power, reactance of inductors and capacitors, resonance, impedance, transformers, semiconductors (diodes, bipolar transistors, FETs), basic amplifier and oscillator principles, and digital logic basics. You should be fluent in decibels: power ratios, voltage ratios, dBm, and cascaded gains and losses.
292 words, about 1 min03Antennas, Transmission Lines and Propagation
Understand antenna fundamentals: resonance, radiation resistance, feed-point impedance, gain and directivity, the half-wave dipole (about 73 Ω, 2.15 dBi), the quarter-wave vertical with ground plane, baluns and ununs, and the meaning of ERP/EIRP. Transmission-line topics: characteristic impedance, coaxial cable loss per metre, velocity factor, standing-wave ratio, reflected power, and matching with transformers or stub networks.
310 words, about 2 min04Transmitters, Receivers, Measurements and Interference Suppression
Transmitter topics: oscillator stability, frequency synthesis with PLL, buffer and driver stages, PA classes (A, AB, B, C), harmonic and spurious emission limits, output filtering, keying and SSB generation, and the causes of splatter and key clicks. Receiver topics: sensitivity, selectivity, dynamic range, intermodulation, blocking, image frequency, mixer principles, AGC, and the superheterodyne architecture with intermediate frequency.
326 words, about 2 min