CBT CBT Signal Processing & Distribution

Question 1

What does SDI stand for in broadcast signal distribution?

Accepted Answer

Serial Digital Interface

Answer

SDI (Serial Digital Interface) is a family of digital video interfaces used in professional broadcast to carry uncompressed digital video over coaxial cable.

Question 2

Which type of filter is used to remove frequencies above a specified cutoff frequency in a broadcast signal chain?

Accepted Answer

Low-pass filter

Answer

A low-pass filter allows frequencies below the cutoff to pass while attenuating higher frequencies, commonly used to limit bandwidth in broadcast audio and video chains.

Question 3

What is the purpose of a distribution amplifier (DA) in a broadcast facility?

Accepted Answer

To split and amplify a signal for multiple destinations without degradation

Answer

A distribution amplifier splits one input signal into multiple identical outputs while maintaining proper impedance and signal level to prevent degradation.

Question 4

What impedance is standard for coaxial cables used in professional broadcast video?

Accepted Answer

75 ohms

Answer

75-ohm coaxial cable is the standard for professional broadcast video, balancing cable loss and power handling characteristics for video frequencies.

Question 5

In digital broadcasting, what is the function of a multiplexer (MUX)?

Accepted Answer

To combine multiple signals onto a single transmission path

Answer

A multiplexer combines multiple signals—such as video, audio, and data streams—into a single composite signal for efficient transmission over one channel.

(CBT) Certified Broadcast Technician Practice Test

(CBT) Certified Broadcast Technician Practice Test

CBT CBT Signal Processing & Distribution