What is the purpose of data framing in telemetry?

• A. To define boundaries of packets, synchronize transmitter/receiver, and facilitate error detection and parsing.
• B. To encrypt data to protect it from unauthorized access.
• C. To compress data for efficient transmission.
• D. To assign priority levels to different data streams.

Answer: (A)

Data framing in telemetry is about turning a continuous data stream into clearly defined units by marking where each unit begins and ends, so the receiver knows when to start and stop interpreting the data. It provides synchronization between the transmitter and receiver, helping them stay aligned even if the stream gets slightly disrupted, so new frames can be read correctly after a loss of synchronization. Framing also carries error-detection information, such as checksums or CRCs, so corrupted frames can be detected and handled appropriately rather than being misinterpreted. Finally, the frame structure lets the receiver parse the data into header, payload, and footer fields accurately, enabling reliable extraction of the measurements.

That combination—defining boundaries, enabling synchronization, and supporting error detection and parsing—is what makes framing essential for telemetry data. Encryption, compression, and priority levels serve different purposes (security, efficiency, and quality of service) and don’t address the core need to reliably delineate and interpret each data unit.