ETSO-C170

• ED Decision 2012/009/R found in: CS-ETSO Amdt 17 - European Technical Standard Orders (Oct 2026)

#### ETSO-C170 *ED Decision 2012/009/R* ##### High Frequency (HF) Radio Communications Transceiver Equipment Operating Within the Radio Frequency 1.5 to 30 Megahertz **1 Applicability** This ETSO gives the requirements which High Frequency (HF) Radio Communications Transceiver Equipment Operating Within the Radio Frequency 1.5 to 30 Megahertz that are manufactured on or after the date of this ETSO must meet in order to be identified with the applicable ETSO marking. This ETSO cancels ETSO-C31d “High Frequency (HF) Radio Communications Transmitting Equipment Operating within the Radio Frequency Range 1.5-30 Megahertz” and ETSO-C32d “High Frequency (HF) Radio Communications Receiving Equipment Operating within the Radio Frequency Range 1.5-30 Megahertz”. **2 Procedures** 2.1 General Applicable procedures are detailed in CS-ETSO [Subpart A](#_DxCrossRefBm920220672). 2.2 Specific None. **3 Technical Conditions** 3.1 Basic 3.1.1 Minimum Performance Standard Standards set forth in the Radio Technical Commission for Aeronautics (RTCA) Document DO-163, Minimum Operational Performance Standards - Airborne HF Radio Communications Transmitting and Receiving Equipment Operating within the Radio-Frequency Range of 1.5 to 30 MHz, dated 09/03/1976. 3.1.2 Environmental Standard See CS-ETSO Subpart A paragraph 2.1. 3.1.3 Computer Software See CS-ETSO Subpart A paragraph 2.2. 3.1.4 Electronic Hardware Qualification See CS-ETSO Subpart A paragraph 2.3. 3.2 Specific 3.2.1 Failure Condition Classification See CS-ETSO Subpart A paragraph 2.4. Failure of the function defined in paragraph 3.1.1 of this ETSO has been determined to be a minor failure condition. **4 Marking** 4.1 General Marking as detailed in CS-ETSO Subpart A paragraph 1.2. 4.2 Specific None **5 Availability of Referenced Document** See CS-ETSO Subpart A paragraph 3. [Amdt ETSO/7]