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Broadcast Systems & Equipment Flashcards

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

Read the first 7 Broadcast Systems & Equipment flashcards as text

  1. What is the key advantage of using fiber optic cable over coaxial cable for signal transport in large broadcast facilities?

    Answer: Immunity to electromagnetic interference and much longer distance capability

    Fiber optic cable is immune to EMI/RFI and supports signal transport over kilometers without amplification, making it ideal for large facilities and outside broadcasts.

  2. In digital broadcast systems, what is the purpose of a serializer/deserializer (SerDes)?

    Answer: To convert parallel data to serial form for transmission and back to parallel at the receiver

    A SerDes chip converts parallel data (multiple bits simultaneously) into a serial bitstream for efficient single-cable transmission, then reverses the process at the destination.

  3. What is the primary difference between SDI and HD-SDI?

    Answer: HD-SDI operates at a higher bit rate (1.485 Gb/s) to carry high-definition video

    SD-SDI operates at 270 Mb/s for standard definition, while HD-SDI runs at 1.485 Gb/s (SMPTE 292M) to accommodate the greater bandwidth of HD video.

  4. What function does a test signal generator serve during broadcast equipment alignment?

    Answer: It produces known reference signals like color bars or tone for calibrating equipment

    Test signal generators produce standardized reference signals (color bars, multiburst, tone) used to align, calibrate, and verify broadcast equipment to specification.

  5. In broadcast audio, what is the function of a mix-minus feed?

    Answer: A program mix sent to a contributor with their own audio removed to prevent feedback

    A mix-minus is the program audio mix minus the recipient's own contribution, preventing echo or feedback when the feed is returned to them.

  6. What is the standard reference level for professional broadcast audio in the United States?

    Answer: +4 dBu nominal operating level

    Professional broadcast audio in the US uses +4 dBu as the nominal operating level, providing headroom above the noise floor and below the clipping point.

  7. What is the purpose of a loudness meter (such as one measuring LKFS/LUFS) in broadcast audio?

    Answer: To measure perceived loudness over time to ensure compliance with broadcast loudness standards

    Loudness meters using ITU-R BS.1770 algorithms measure integrated loudness (LKFS/LUFS) over time to ensure compliance with standards like ATSC A/85 in the US.