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E1C12

COMMISSION RULES · Automatic and remote control; band-specific regulations; operating in and communicating with foreign countries; spurious emission standards; HF modulation index limit; band-specific rules

E1C12§ 97.305(c)E1C →

In what portion of the 630-meter band are phone emissions permitted?

  1. ANone
  2. BOnly the top 3 kHz
  3. COnly the bottom 3 kHz
  4. DThe entire band
Why The 630-meter band runs from 472 to 479 kHz, a slice only 7 kHz wide. Section 97.305(c) lists the emission types authorized on each band, and for 630 meters it authorizes CW, RTTY/data, phone and image across the whole allocation, with no subband split. So phone is legal anywhere in the band, subject to the 5 W EIRP power limit and the notification requirement in 97.303.
Watch out The choices offering only the top or bottom 3 kHz mimic the CW/phone subband structure of the HF bands like 80 or 40 meters, but the LF/MF bands have no such segmentation, and the answer of 'none' confuses 630 meters with the older days when the band was not allocated at all.
630 m = 472-479 kHz, just 7 kHz wide: too small to split, so all authorized modes go anywhere in it.
HamSandwich explanation, first draft. The question and answers are the NCVEC text.
47 CFR 97.305(c) Authorized emission types.

(a) Except as specified elsewhere in this part, an amateur station may transmit a CW emission on any frequency authorized to the control operator.

(b) A station may transmit a test emission on any frequency authorized to the control operator for brief periods for experimental purposes, except that no pulse modulation emission may be transmitted on any frequency where pulse is not specifically authorized and no SS modulation emission may be transmitted on any frequency where SS is not specifically authorized.

(c) A station may transmit the following emission types on the frequencies indicated, as authorized to the control operator, subject to the standards specified in § 97.307(f):

eCFR text as of 1 Sep 2026 · read on ecfr.gov
← E1C11 All of E1C

The rest of E1C

  1. E1C01 What is the maximum bandwidth for a data emission on 60 meters?
  2. E1C02 Which of the following apply to communications transmitted to amateur stations in foreign countries?
  3. E1C03 How long must an operator wait after filing a notification with the Utilities Technology Council (UTC) before…
  4. E1C04 What is an IARP?
  5. E1C05 Under what situation may a station transmit third party communications while being automatically controlled?
  6. E1C06 Which of the following is required in order to operate in accordance with CEPT rules in foreign countries whe…
  7. E1C07 What notifications must be given before transmitting on the 630- or 2200-meter bands?
  8. E1C08 What is the maximum permissible duration of a remotely controlled station's transmissions if its control link…
  9. E1C09 What is the highest modulation index permitted at the highest modulation frequency for angle modulation below…
  10. E1C10 What is the maximum mean power level for a spurious emission below 30 MHz with respect to the fundamental emi…
  11. E1C11 Which of the following operating arrangements allows an FCC-licensed US citizen to operate in many European c…
  12. E1C12 In what portion of the 630-meter band are phone emissions permitted?
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