3.3 KiB
T2B – VHF/UHF operating practices: FM repeater, simplex, reverse splits; Access tones: CTCSS, DTMF; DMR operation; Resolving operational problems; Q signals
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T2B01 (C) How is a VHF/UHF transceiver’s “reverse” function used?
- A. To reduce power output
- B. To increase power output
- C. To listen on a repeater’s input frequency
- D. To listen on a repeater’s output frequency
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T2B02 (D) What term describes the use of a sub-audible tone transmitted along with normal voice audio to open the squelch of a receiver? #card
- A. Carrier squelch
- B. Tone burst
- C. DTMF
- D. CTCSS
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T2B03 (A) Which of the following describes a linked repeater network? #card
- A. A network of repeaters in which signals received by one repeater are transmitted by all the repeaters in the network
- B. A single repeater with more than one receiver
- C. Multiple repeaters with the same control operator
- D. A system of repeaters linked by APRS
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T2B04 (D) Which of the following could be the reason you are unable to access a repeater whose output you can hear? #card
- A. Improper transceiver offset
- B. You are using the wrong CTCSS tone
- C. You are using the wrong DCS code
- D. All these choices are correct
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T2B05 (C) What would cause your FM transmission audio to be distorted on voice peaks? #card
- A. Your repeater offset is inverted
- B. You need to talk louder
- C. You are talking too loudly
- D. Your transmit power is too high
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T2B06 (A) What type of signaling uses pairs of audio tones? #card
- A. DTMF
- B. CTCSS
- C. GPRS
- D. D-STAR
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T2B07 (C) How can you join a digital repeater’s “talkgroup”? #card
- A. Register your radio with the local FCC office
- B. Join the repeater owner’s club
- C. Program your radio with the group’s ID or code
- D. Sign your call after the courtesy tone
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T2B08 (A) Which of the following applies when two stations transmitting on the same frequency interfere with each other? #card
- A. The stations should negotiate continued use of the frequency
- B. Both stations should choose another frequency to avoid conflict
- C. Interference is inevitable, so no action is required
- D. Use subaudible tones so both stations can share the frequency
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T2B09 (A) Why are simplex channels designated in the VHF/UHF band plans? #card
- A. So stations within range of each other can communicate without tying up a repeater
- B. For contest operation
- C. For working DX only
- D. So stations with simple transmitters can access the repeater without automated offset
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T2B10 (A) Which Q signal indicates that you are receiving interference from other stations? #card
- A. QRM
- B. QRN
- C. QTH
- D. QSB
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T2B11 (B) Which Q signal indicates that you are changing frequency? #card
- A. QRU
- B. QSY
- C. QSL
- D. QRZ
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T2B12 (A) What is the purpose of the color code used on DMR repeater systems? #card
- A. Must match the repeater color code for access
- B. Defines the frequency pair to use
- C. Identifies the codec used
- D. Defines the minimum signal level required for access
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T2B13 (B) What is the purpose of a squelch function? #card
- A. Reduce a CW transmitter's key clicks
- B. Mute the receiver audio when a signal is not present
- C. Eliminate parasitic oscillations in an RF amplifier
- D. Reduce interference from impulse noise