Practice Test Geeks(CED) Certified Emergency Dispatcher Practice Test
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Radio & Telecommunication Systems Flashcards

7 cards from real CED practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Radio & Telecommunication Systems flashcards as text

  1. When a dispatcher receives a garbled transmission on the primary channel, what is the FIRST action they should take?

    Answer: Ask the unit to repeat the transmission and identify their location

    The dispatcher should request a repeat and confirm unit identity to gather the information needed before taking further action.

  2. What does the term 'trunked radio system' refer to in public safety communications?

    Answer: A system that dynamically assigns frequencies from a pool to users on demand

    A trunked radio system automatically assigns available frequencies from a shared pool, increasing efficiency and reducing channel congestion.

  3. Which radio transmission mode allows both parties to speak and listen simultaneously?

    Answer: Full-duplex

    Full-duplex allows simultaneous two-way communication, similar to a telephone call, because separate frequencies are used for sending and receiving.

  4. A dispatcher notices that a unit's radio transmission cuts off before the message is complete. This is MOST likely caused by:

    Answer: The unit releasing the PTT button too early

    Releasing the Push-To-Talk button prematurely is the most common cause of truncated transmissions in the field.

  5. What is the purpose of a 'talk group' in a digital radio system?

    Answer: To logically group users so they communicate on a shared virtual channel

    A talk group organizes users with shared operational needs onto a virtual channel within a trunked or digital network.

  6. In emergency communications, what does 'interoperability' specifically mean?

    Answer: The ability of different agencies' radio systems to communicate with each other

    Interoperability is the capability for radio systems from different agencies or jurisdictions to exchange voice and data communications during incidents.

  7. Which piece of equipment is used to extend the range of portable radios in the field by receiving and retransmitting signals?

    Answer: Repeater

    A repeater receives a radio signal on one frequency and simultaneously retransmits it at higher power on another frequency to extend coverage.