CBT Study Guide 2026
Everything you need to pass the CBT exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
📋 CBT Exam Format at a Glance
📚 CBT Topics to Study (21)
✍️ Sample CBT Questions & Answers
1. What does a routing switcher (router) do in a broadcast facility?
A routing switcher allows any input signal (video, audio, or data) to be connected to any output destination, providing flexible signal distribution throughout the facility.
2. In ATSC standards, what does the term 'subchannel' or 'multicast' refer to?
Multicasting allows a broadcaster to carry multiple program streams simultaneously within a single 6 MHz ATSC channel.
3. What is the difference between drop-frame and non-drop-frame SMPTE timecode?
Drop-frame timecode compensates for the 29.97 fps rate (not exactly 30 fps) by skipping frame numbers 00 and 01 at the start of each minute, except every 10th minute, keeping timecode aligned with wall clock time.
4. What is the standard characteristic impedance of most coaxial transmission lines used in broadcast RF systems?
50 ohms is the standard characteristic impedance for broadcast transmitter output and coaxial transmission lines, as it balances low loss and high power handling.
5. What is the primary purpose of a transmission line in a broadcast RF system?
A transmission line's primary role is to efficiently transfer RF energy from the transmitter output to the antenna while minimizing losses due to reflection and attenuation.
6. What is the function of a transmitter in a broadcast system?
A transmitter is a core component in a broadcast system that takes an audio or video signal (the program material) and converts it into a high-frequency radio frequency (RF) signal. This RF signal is then amplified and sent to an antenna for wireless propagation over the airwaves, enabling the broadcast of content to receivers. It is the device that generates the broadcast signal.