RECOMMENDATION ITU-R F.612*, ** - Measurement of reciprocal mixing in HF communication receivers in the ... ANNEX I 1. Introduction 2. Effects of reciprocal mixing 3. Measurement of reciprocal mixing 4. Methods of measurement 4.1 Method I (see case 2, Table I) 4.2 Method II (see case 5, Table I) 4.3 Typical values