47 CFR § 15.223 - Operation in the band 1.705-10 MHz.

---
identifier: "/us/cfr/t47/s15.223"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "47 CFR § 15.223 - Operation in the band 1.705-10 MHz."
title_number: 47
title_name: "Telecommunication"
section_number: "15.223"
section_name: "Operation in the band 1.705-10 MHz."
chapter_name: "FEDERAL COMMUNICATIONS COMMISSION"
subchapter_number: "A"
subchapter_name: "GENERAL"
part_number: "15"
part_name: "RADIO FREQUENCY DEVICES"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "47 U.S.C. 154, 302a, 303, 304, 307, 336, 544a, and 549."
regulatory_source: "54 FR 17714, Apr. 25, 1989, unless otherwise noted."
cfr_part: "15"
---


# 15.223 Operation in the band 1.705-10 MHz.

(a) The field strength of any emission within the band 1.705-10.0 MHz shall not exceed 100 microvolts/meter at a distance of 30 meters. However, if the bandwidth of the emission is less than 10% of the center frequency, the field strength shall not exceed 15 microvolts/meter or (the bandwidth of the device in kHz) divided by (the center frequency of the device in MHz) microvolts/meter at a distance of 30 meters, whichever is the higher level. For the purposes of this section, bandwidth is determined at the points 6 dB down from the modulated carrier. The emission limits in this paragraph are based on measurement instrumentation employing an average detector. The provisions in § 15.35(b) for limiting peak emissions apply.

(b) The field strength of emissions outside of the band 1.705-10.0 MHz shall not exceed the general radiated emission limits in § 15.209.