47 CFR § 5.101 - Frequency stability.

---
identifier: "/us/cfr/t47/s5.101"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "47 CFR § 5.101 - Frequency stability."
title_number: 47
title_name: "Telecommunication"
section_number: "5.101"
section_name: "Frequency stability."
chapter_name: "FEDERAL COMMUNICATIONS COMMISSION"
subchapter_number: "A"
subchapter_name: "GENERAL"
part_number: "5"
part_name: "EXPERIMENTAL RADIO 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. 154, 301, 302, 303, 307, 336."
regulatory_source: "78 FR 25162, Apr. 29, 2013, unless otherwise noted."
cfr_part: "5"
---


# 5.101 Frequency stability.

Experimental Radio Service licensees shall ensure that transmitted emissions remain within the authorized frequency band under normal operating conditions: Equipment is presumed to operate over the temperature range −20 to + 50 degrees Celsius with an input voltage variation of 85% to 115% of rated input voltage, unless justification is presented to demonstrate otherwise.