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Output Radio Frequency Spectrum
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<p>ORFS stands for <i>Output RF Spectrum</i>, where 'RF' stands for <a href="/facts/Radio_Frequency/aWku7h4R">Radio Frequency</a>. </p><p>The acronym ORFS is used in the context of mobile communication systems, e.g., <a href="/facts/GSM/Sw8QYaLE">GSM</a>. It stands for the relationship between (a) the frequency offset from the carrier and (b) the power, measured in a specific bandwidth and time, produced by the mobile station due to effects in modulation and <a href="/facts/Power_ramp/bhsD3KpK">power ramping</a> and switching. ORFS measurements are defined and required in order to prove conformance by various institutions, e.g., the U.S. <a href="/facts/Federal_Communications_Commission/Ueghz8W0">Federal Communications Commission</a> (FCC) or <a href="/facts/ETSI/8rJbbhPg">ETSI</a>. </p>