Ham Radio Technician Test Repeaters & Linking Systems 1 — Questions and Answers
Question 1: What is the primary purpose of a repeater in amateur radio?
- To convert analog signals to digital format
- To amplify a signal on the same frequency without retransmitting
- To retransmit signals simultaneously on a different frequency to extend range (Correct answer)
- To store and forward digital messages
Correct answer: To retransmit signals simultaneously on a different frequency to extend range
A repeater receives a signal on its input frequency and simultaneously retransmits it on its output frequency to extend the range of communications.
Question 2: What is the term for the difference between a repeater's input (receive) frequency and its output (transmit) frequency?
- Deviation
- Offset (Correct answer)
- Bandwidth
- Separation
Correct answer: Offset
The offset is the frequency difference between what the repeater receives and what it transmits, typically expressed in kHz or MHz.
Question 3: What is the standard repeater frequency offset for the 2-meter (144 MHz) band?
- 100 kHz
- 1.0 MHz
- 600 kHz (Correct answer)
- 5.0 MHz
Correct answer: 600 kHz
The standard offset for 2-meter repeaters is 600 kHz, applied either plus or minus from the output frequency.
Question 4: What is the standard repeater frequency offset for the 70-centimeter (440 MHz) band?
- 600 kHz
- 1.6 MHz
- 5.0 MHz (Correct answer)
- 10.0 MHz
Correct answer: 5.0 MHz
The standard offset for 70-centimeter (UHF) repeaters is 5.0 MHz, which is larger than the 2-meter offset.
Question 5: What is CTCSS in the context of repeater operation?
- A subaudible tone system used to selectively activate repeaters (Correct answer)
- A digital data system for repeater identification
- A frequency coordination protocol for repeater trustees
- A system for linking repeaters via the internet
Correct answer: A subaudible tone system used to selectively activate repeaters
CTCSS (Continuous Tone-Coded Squelch System) uses subaudible tones transmitted with your signal to selectively open a repeater's squelch.
Question 6: What does 'full duplex' mean in the context of repeater operation?
- The repeater operates simultaneously on two different bands
- The repeater uses two separate antenna systems
- The repeater supports two different modulation types
- The repeater can receive on its input and transmit on its output simultaneously (Correct answer)
Correct answer: The repeater can receive on its input and transmit on its output simultaneously
Full duplex operation means the repeater receives on its input frequency and retransmits on its output frequency at the same time.
Question 7: What is a 'courtesy tone' on a repeater?
- A tone sent by the user to activate the repeater
- A tone played by the repeater signaling it is ready for the next transmission (Correct answer)
- A tone that announces the repeater's callsign
- A tone warning users the repeater is about to time out
Correct answer: A tone played by the repeater signaling it is ready for the next transmission
A courtesy tone is played by the repeater after a transmission ends to indicate it has received the signal and the channel is ready for another station.
Ham Radio Technician Test Repeaters & Linking Systems 1
What is the primary purpose of a repeater in amateur radio?