47 CFR § 30.402 - Frequency tolerance.

---
identifier: "/us/cfr/t47/s30.402"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "47 CFR § 30.402 - Frequency tolerance."
title_number: 47
title_name: "Telecommunication"
section_number: "30.402"
section_name: "Frequency tolerance."
chapter_name: "FEDERAL COMMUNICATIONS COMMISSION"
subchapter_number: "B"
subchapter_name: "COMMON CARRIER SERVICES"
part_number: "30"
part_name: "UPPER MICROWAVE FLEXIBLE USE SERVICE"
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. 151, 152, 153, 154, 301, 303, 304, 307, 309, 310, 316, 332, 1302, unless otherwise noted."
regulatory_source: "81 FR 79937, Nov. 14, 2016, unless otherwise noted."
cfr_part: "30"
---


# 30.402 Frequency tolerance.

The carrier frequency of each transmitter authorized under this subpart must be maintained within the following percentage of the reference frequency (unless otherwise specified in the instrument of station authorization the reference frequency will be deemed to be the assigned frequency):

| Frequency (MHz) | Frequencytolerance(percent) |
| --- | --- |
| 27,500 to 28,350 | 0.001 |
| 38,600 to 40,000 | 0.03 |