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T4B11

AMATEUR RADIO PRACTICES · Operating controls: frequency tuning, use of filters, squelch function, AGC, memory channels, noise blanker, microphone gain, receiver incremental tuning (RIT), bandwidth selection, scanning function; Digital transceiver configuration; DMR code plugs and talk groups

T4B11T4B →

Which of the following must be programmed into a D-STAR digital transceiver before transmitting?

  1. AYour call sign
  2. BYour output power
  3. CThe codec type being used
  4. DAll these choices are correct
Why D-STAR sends your call sign as digital data in every transmission, so the radio must have MYCALL programmed before it will identify you properly on the air. This is the digital equivalent of station identification, and many repeaters and gateways will reject or ignore a transmission from a radio with no call sign entered. Other D-STAR fields like UR, RPT1 and RPT2 control routing, but the call sign is the one that must be set.
Watch out The codec is not a user choice: D-STAR uses the AMBE voice codec exclusively, so there is nothing to program. Output power is set with a control or menu item like any FM radio and is not part of the digital data stream.
D-STAR stands for Digital Smart Technologies; the smart part is that your call sign rides along in the data.
HamSandwich explanation, first draft. The question and answers are the NCVEC text.
← T4B10 All of T4B

The rest of T4B

  1. T4B01 What is the effect of excessive microphone gain on SSB transmissions?
  2. T4B02 Which of the following can be used to enter a transceiver's operating frequency?
  3. T4B03 How is squelch adjusted so that a weak FM signal can be heard?
  4. T4B04 What does an FM signal sound like when received slightly off frequency?
  5. T4B05 What does the scanning function of an FM transceiver do?
  6. T4B06 Which of the following controls could be used if the voice pitch of a single-sideband signal returning to you…
  7. T4B07 What is a DMR "code plug"?
  8. T4B08 What is the advantage of having a choice of receiver filter bandwidths in a multimode transceiver?
  9. T4B09 How is a specific group of stations selected on a DMR digital voice transceiver?
  10. T4B10 Which of the following receiver filter bandwidths provides the best signal-to-noise ratio for SSB reception?
  11. T4B11 Which of the following must be programmed into a D-STAR digital transceiver before transmitting?
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