AM transmitters & antennas

What does the oscillator stage do for both AM & FM transmitters?

• generates the ERP
• generates the RF signal
• produces the transmitter power output
• produces the transmission line efficiency

What happens right after the oscillator stage for AM stations (but later for FM)?

• signal is amplified
• modulation is added
• signal is broadcast

What happens right before the antenna for AM stations (but before amplification for FM)?

• signal is amplified
• modulation is added
• signal is broadcast

What will both AM & FM transmitter doors do if opened?

• Automatically turn off the transmitter
• Explode
• Ask for authorization

Why should AM & FM transmitter doors never be opened without b-cast engineer supervision?

• You wouldn't know what switches and circuits to push
• The transmitter cannot handle additional airflow
• Transmitters have lethal high voltages or currents

Instead of bays/elements like FM stations, what do AM stations use as their antenna radiating elements?

• Directional antenna system
• The entire tower
• Tube-type transmitters

What does an antenna tuning unit/line-terminating unit/dog house do?

• Tunes AM stations onto their assigned frequency
• Makes the transmission line characteristics match the tower
• Generates power for the AM antenna

Which AM towers are grounded?

• Ones with a base insulator
• Ones with wires running up and down the tower

What does a base insulator do for an AM tower

• Keeps its roots warm
• Keeps it from being grounded
• Allows its signal to radiate into the ground
• Gives it additional weight support

What is a daytimer?

• A station that operates only in the day
• A retiree who gets up at dawn and is in bed by sunset
• A station that increases its signal during the day
• A station that avoids operating during the day