Study Technician T2B

T2B

OPERATING PROCEDURES

VHF/UHF operating practices: FM repeater, simplex, reverse splits; Access tones: CTCSS, DTMF; DMR operation; Resolving operating problems; Q signals

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T2B01

What is the purpose of the reverse function on a VHF/UHF transceiver?

  1. A To reduce power output
  2. B To increase power output
  3. C To listen on a repeater's input frequency
  4. 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?

  1. A Carrier squelch
  2. B Tone burst
  3. C DTMF
  4. D CTCSS
T2B03

Which of the following describes a linked repeater network?

  1. A A network of repeaters in which signals received by one repeater are transmitted by all the repeaters in the network
  2. B A single repeater with more than one receiver
  3. C Multiple repeaters with the same control operator
  4. 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?

  1. A Improper transceiver offset
  2. B You are using the wrong CTCSS tone
  3. C You are using the wrong DCS code
  4. D All these choices are correct
T2B05

Which of the following would cause your FM transmission audio to drop out on voice peaks?

  1. A Your repeater offset is inverted
  2. B Your FM deviation is too low
  3. C You are talking too loudly
  4. D Your transmit power is too high
T2B06

What type of signaling to a repeater uses two simultaneous audio tones?

  1. A DTMF
  2. B CTCSS
  3. C GMRS
  4. D D-STAR
T2B07

How can you join a digital repeater's "talkgroup"?

  1. A Register with the local Frequency Coordinator
  2. B Register with the digital repeater control operator
  3. C Program your radio with the group's ID or code
  4. 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?

  1. A The stations should negotiate continued use of the frequency
  2. B Both stations should choose another frequency to avoid conflict
  3. C Whichever station was on the frequency first has preemptive rights to the frequency
  4. D Use subaudible tones so both stations can share the frequency
T2B09

Why are simplex channels designated in the VHF/UHF band plans?

  1. A So stations within range of each other can communicate without tying up a repeater
  2. B For contest operation
  3. C For working DX only
  4. 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?

  1. A QRM
  2. B QRN
  3. C QTH
  4. D QSB
T2B11

Which Q signal indicates that you are changing frequency?

  1. A QRU
  2. B QSY
  3. C QSL
  4. D QRZ
T2B12

What is the digital color code used on DMR repeater systems?

  1. A An access code which must be programmed into a DMR transmitter to access a specific repeater
  2. B A code which automatically programs the repeater offset to a frequency chosen by the user
  3. C A code which identifies the specific CODEC being used so that the repeater can properly decode the audio
  4. D A code transmitted by the repeater to indicate health and status of the equipment
T2B13

What is the purpose of a squelch function?

  1. A Reduce a CW transmitter's key clicks
  2. B Mute the receiver audio when a signal is not present
  3. C Eliminate parasitic oscillations in an RF amplifier
  4. D Reduce interference from impulse noise
T2B14

Which of the following is a "talkgroup"?

  1. A A group of amateur radio operators who share email on a specific amateur radio topic
  2. 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
  3. C The members of a net organized for amateur radio operators with a specific common interest
  4. D A method of automatically alerting all group members to the frequency where any member is transmitting
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