Technician exam question T4A06
Subelement T4, AMATEUR RADIO PRACTICES· Group T4A
What signals are used in a computer-radio interface for digital mode operation?
- A.Receive and transmit mode, status, and location
- B.Antenna and RF power
- C.Receive audio, transmit audio, and transmitter keying (correct answer)
- D.NMEA GPS location and DC power
WhyA computer-radio interface for digital mode operation uses receive audio, transmit audio, and transmitter keying signals. A computer-radio digital mode interface only needs three signals to work: receive audio, transmit audio, and a way to key the transmitter on and off, answer C. Mode/status/location data (A) and GPS/DC power (D) aren't part of the audio path at all, and antenna/RF power (B) belongs to the transmission line, not the computer interface.
Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2026-2030 NCVEC Element 2 pool (public domain); the explanation above is original writing, see our methodology.
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