VHF/UHF operating practices: FM repeater, simplex, reverse splits; Access tones: CTCSS, DTMF; DMR operation; Resolving operating problems; Q signals
T2B01
What is the purpose of the reverse function on a VHF/UHF transceiver?
-
A
To reduce power output
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B
To increase power output
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C
To listen on a repeater's input frequency
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D
To listen on a repeater's output frequency
T2B02
What term describes the use of a sub-audible tone transmitted along with normal voice audio to open the squelch of a receiver?
-
A
Carrier squelch
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B
Tone burst
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C
DTMF
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D
CTCSS
T2B03
Which of the following describes a linked repeater network?
-
A
A network of repeaters in which signals received by one repeater are transmitted by all the repeaters in the network
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B
A single repeater with more than one receiver
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C
Multiple repeaters with the same control operator
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D
A system of repeaters linked by APRS
T2B04
Which of the following could be the reason you are unable to access a repeater whose output you can hear?
-
A
Improper transceiver offset
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B
You are using the wrong CTCSS tone
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C
You are using the wrong DCS code
-
D
All these choices are correct
T2B05
Which of the following would cause your FM transmission audio to drop out on voice peaks?
-
A
Your repeater offset is inverted
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B
Your FM deviation is too low
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C
You are talking too loudly
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D
Your transmit power is too high
T2B06
What type of signaling to a repeater uses two simultaneous audio tones?
-
A
DTMF
-
B
CTCSS
-
C
GMRS
-
D
D-STAR
T2B07
How can you join a digital repeater's "talkgroup"?
-
A
Register with the local Frequency Coordinator
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B
Register with the digital repeater control operator
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C
Program your radio with the group's ID or code
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D
Program your radio with the DTMF tone used by the talkgroup
T2B08
Which of the following applies when two stations transmitting on the same frequency interfere with each other?
-
A
The stations should negotiate continued use of the frequency
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B
Both stations should choose another frequency to avoid conflict
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C
Whichever station was on the frequency first has preemptive rights to the frequency
-
D
Use subaudible tones so both stations can share the frequency
T2B09
Why are simplex channels designated in the VHF/UHF band plans?
-
A
So stations within range of each other can communicate without tying up a repeater
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B
For contest operation
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C
For working DX only
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D
So stations with simple transmitters can access the repeater without automated offset
T2B10
Which Q signal indicates that you are receiving interference from other stations?
-
A
QRM
-
B
QRN
-
C
QTH
-
D
QSB
T2B11
Which Q signal indicates that you are changing frequency?
-
A
QRU
-
B
QSY
-
C
QSL
-
D
QRZ
T2B12
What is the digital color code used on DMR repeater systems?
-
A
An access code which must be programmed into a DMR transmitter to access a specific repeater
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B
A code which automatically programs the repeater offset to a frequency chosen by the user
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C
A code which identifies the specific CODEC being used so that the repeater can properly decode the audio
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D
A code transmitted by the repeater to indicate health and status of the equipment
T2B13
What is the purpose of a squelch function?
-
A
Reduce a CW transmitter's key clicks
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B
Mute the receiver audio when a signal is not present
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C
Eliminate parasitic oscillations in an RF amplifier
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D
Reduce interference from impulse noise
T2B14
Which of the following is a "talkgroup"?
-
A
A group of amateur radio operators who share email on a specific amateur radio topic
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B
An identifier used by DMR to organize radio traffic so that those who want to hear the group aren't bothered by other radio traffic
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C
The members of a net organized for amateur radio operators with a specific common interest
-
D
A method of automatically alerting all group members to the frequency where any member is transmitting