Extra exam question E1C10
Subelement E1, COMMISSION RULES· Group E1C · 47 CFR §97.307
What is the maximum mean power level for a spurious emission below 30 MHz with respect to the fundamental emission?
- A.- 43 dB (correct answer)
- B.- 53 dB
- C.- 63 dB
- D.- 73 dB
WhyThe maximum mean power level for a spurious emission below 30 MHz is 43 dB below the fundamental emission's mean power. §97.307 sets the maximum mean power of a spurious emission below 30 MHz at 43 dB below the mean power of the fundamental emission, answer A. The more aggressive figures of -53, -63, and -73 dB describe tighter suppression than the actual HF spurious emission standard requires.
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.
Related questions
- E1C01What is the maximum bandwidth for a data emission on 60 meters?
- E1C02Which of the following apply to communications transmitted to amateur stations in foreign countries?
- E1C03How long must an operator wait after filing a notification with the Utilities Technology Council (UTC) before operating on the 2200-meter or 630-meter band?
- E1C04What is an IARP?
- E1C05Under what situation may a station transmit third party communications while being automatically controlled?