CTS AV Control Systems

Question 1

Which control protocol uses a 3-wire interface (TX, RX, GND) and is commonly used to control projectors, displays, and signal processors in AV systems?

Accepted Answer

RS-232

Answer

RS-485

Answer

DMX512

Answer

I2C

Question 2

In an AV control system, what is the purpose of an 'IR emitter' (infrared emitter)?

Accepted Answer

To transmit remote control commands to devices that lack RS-232 or IP control ports

Answer

To detect ambient light levels for automatic display brightness adjustment

Answer

To sense occupancy in a room and trigger system power-on

Answer

To distribute video signals over fiber optic cable

Question 3

A control system programmer writes a conditional statement: 'IF projector lamp hours > 3000, THEN send email alert.' This is an example of which programming construct?

Accepted Answer

Event-driven logic based on a threshold condition

Answer

A feedback loop

Answer

A subroutine

Answer

A polling loop

Question 4

When configuring a TCP/IP-controlled device in a control system, what is typically required in addition to the device's IP address?

Accepted Answer

The port number the device listens on for control commands

Answer

The device's MAC address for ARP resolution

Answer

A DHCP reservation from the router

Answer

The device's subnet mask only

Question 5

What is the primary benefit of using a graphical touchpanel interface in a room control system compared to a button panel?

Accepted Answer

Touchpanels allow the interface to be dynamically reconfigured in software without rewiring

Answer

Touchpanels always have lower latency than button panels

Answer

Touchpanels eliminate the need for a central control processor

Answer

Touchpanels are more reliable than physical buttons in high-humidity environments

Question 6

A control processor needs to receive feedback from a display to confirm it is powered on. Which method provides this feedback most reliably?

Accepted Answer

Two-way RS-232 or IP communication with status query commands

Answer

A light sensor pointed at the display screen

Answer

A timer that assumes the display is on 10 seconds after the power-on command is sent

Answer

Monitoring the display's power LED with a contact closure sensor