Frequency offset
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In radio engineering, a frequency offset is an intentional slight shift of the broadcast radio frequency (RF), to reduce interference with other transmitters. Carrier frequency offset arises from mismatches between the received signal's carrier frequency and the receiver's local oscillator, often due to synchronization errors and Doppler shifts.
In radio engineering, a frequency offset is an intentional slight shift of the broadcast radio frequency (RF), to reduce interference with other transmitters. Carrier frequency offset arises from mismatches between the received signal's carrier frequency and the receiver's local oscillator, often due to synchronization errors and Doppler shifts. f_{os} = f_{ch} + \frac{f_L\cdot p}{12} where, f_{os} is the offset RF, f_{ch} is the standard channel frequency, p is an integer such that -12 or 0>p>12 f_L is the line frequency. (15625 Hz. for 625-line systems, 15750 Hz. for System M and System J and 20475 Hz. for system E) Precision offset is the same as frequency offset, except that in this case, the offset frequency is produced by a cesium controlled oscillator. f_{os} = 203 250 000 + \frac{15626\cdot 8}{12} \approx 203260417 8n offset of the same channel is likewise f_{os} = 203 250 000 - \frac{15626\cdot 8}{12} \approx 203239583 ==References==
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