Extra exam question E1D01
Subelement E1, COMMISSION RULES· Group E1D · 47 CFR §97.3
What is the definition of telemetry?
- A.One-way transmission of measurements at a distance from the measuring instrument (correct answer)
- B.Two-way transmissions in excess of 1000 feet
- C.Two-way transmissions of data
- D.One-way transmission that initiates, modifies, or terminates the functions of a device at a distance
WhyTelemetry is the one-way transmission of measurements taken at a distance from the measuring instrument. §97.3 defines telemetry as a one-way transmission that reports measurements taken at a distance from the measuring instrument, the kind of data link used to report a balloon's altitude or a satellite's battery voltage back to the ground, answer A. That's distinct from telecommand, which is a one-way transmission that changes what a remote device does rather than just reporting a measurement, so options describing two-way links or a device-control function don't fit the definition.
Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2024-2028 NCVEC Element 4 pool (public domain); the explanation above is original writing, see our methodology.
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