93 lines
3.4 KiB
Markdown
93 lines
3.4 KiB
Markdown
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)
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How is a VHF/UHF transceiver’s “reverse” function used?
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- 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
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- [[T2B02]] (D)
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What term describes the use of a sub-audible tone transmitted along with normal voice audio to open the squelch of a receiver? #card
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- A. Carrier squelch
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- B. Tone burst
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- C. DTMF
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- D. CTCSS
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- [[T2B03]] (A)
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Which of the following describes a linked repeater network? #card
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- 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
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- [[T2B04]] (D)
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Which of the following could be the reason you are unable to access a repeater whose output you can hear? #card
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- 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
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- D. All these choices are correct
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- [[T2B05]] (C)
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What would cause your FM transmission audio to be distorted on voice peaks? #card
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- A. Your repeater offset is inverted
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- B. You need to talk louder
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- C. You are talking too loudly
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- D. Your transmit power is too high
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- [[T2B06]] (A)
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What type of signaling uses pairs of audio tones? #card
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- A. DTMF
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- B. CTCSS
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- C. GPRS
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- D. D-STAR
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- [[T2B07]] (C)
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How can you join a digital repeater’s “talkgroup”? #card
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- A. Register your radio with the local FCC office
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- B. Join the repeater owner’s club
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- C. Program your radio with the group’s ID or code
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- D. Sign your call after the courtesy tone
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- [[T2B08]] (A)
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Which of the following applies when two stations transmitting on the same frequency interfere with each other? #card
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- 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. Interference is inevitable, so no action is required
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- D. Use subaudible tones so both stations can share the frequency
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- [[T2B09]] (A)
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Why are simplex channels designated in the VHF/UHF band plans? #card
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- 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
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- [[T2B10]] (A)
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Which Q signal indicates that you are receiving interference from other stations? #card
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- A. QRM
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- B. QRN
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- C. QTH
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- D. QSB
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- [[T2B11]] (B)
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Which Q signal indicates that you are changing frequency? #card
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- A. QRU
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- B. QSY
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- C. QSL
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- D. QRZ
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- [[T2B12]] (A)
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What is the purpose of the color code used on DMR repeater systems? #card
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- A. Must match the repeater color code for access
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- B. Defines the frequency pair to use
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- C. Identifies the codec used
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- D. Defines the minimum signal level required for access
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- [[T2B13]] (B)
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What is the purpose of a squelch function? #card
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- 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
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