---
kind: "section"
citation: "47 C.F.R. § 15.223"
title: "47"
number: "15.223"
heading: "Operation in the band 1.705-10 MHz."
url: "https://uscodex.org/cfr/47/15.223"
---

# §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)](/cfr/47/15.35.md?p=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](/cfr/47/15.209.md).

## Notes

### Authority

Authority: 47 U.S.C. 154, 302a, 303, 304, 307, 336, 544a, and 549.

### Source

Source: 54 FR 17714, Apr. 25, 1989, unless otherwise noted.