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T2B10

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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Which Q signal indicates that you are receiving interference from other stations?

  1. AQRM
  2. BQRN
  3. CQTH
  4. DQSB
Why QRM is the Q signal for interference from other stations, that is, man-made interference from other transmitters. The Q signal set is a shorthand from telegraphy that carried over into voice operating: QRM means "I am being interfered with" by other signals.
Watch out QRN is the close cousin but refers to natural or atmospheric noise such as static crashes from lightning, not other stations. QSB means fading of the signal, and QTH is your location.
QRM = Man-made (other hams). QRN = Nature/Noise. QSB = Signal Bouncing (fading). QTH = The Home spot.
HamSandwich explanation, first draft. The question and answers are the NCVEC text.
← T2B09 All of T2B T2B11 →

The rest of T2B

  1. T2B01 What is the purpose of the reverse function on a VHF/UHF transceiver?
  2. T2B02 What term describes the use of a sub-audible tone transmitted along with normal voice audio to open the squel…
  3. T2B03 Which of the following describes a linked repeater network?
  4. T2B04 Which of the following could be the reason you are unable to access a repeater whose output you can hear?
  5. T2B05 Which of the following would cause your FM transmission audio to drop out on voice peaks?
  6. T2B06 What type of signaling to a repeater uses two simultaneous audio tones?
  7. T2B07 How can you join a digital repeater's "talkgroup"?
  8. T2B08 Which of the following applies when two stations transmitting on the same frequency interfere with each other?
  9. T2B09 Why are simplex channels designated in the VHF/UHF band plans?
  10. T2B10 Which Q signal indicates that you are receiving interference from other stations?
  11. T2B11 Which Q signal indicates that you are changing frequency?
  12. T2B12 What is the digital color code used on DMR repeater systems?
  13. T2B13 What is the purpose of a squelch function?
  14. T2B14 Which of the following is a "talkgroup"?
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