| 1. | Railroads used medium frequency range ( crossband " ).
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| 2. | Medium frequency is defined as 5 15 kHz.
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| 3. | Navtex broadcasts are primarily made on the medium frequencies of 518 kHz and 490 kHz.
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| 4. | At medium frequencies, this appears to " bend " or refract the signal beyond the horizon.
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| 5. | Sometimes, part of the medium frequency ( MF ) band ( 300 3000 kHz ) is included.
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| 6. | Typically an induction heater operates at either medium frequency ( MF ) or radio frequency ( RF ) ranges.
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| 7. | A " Z " marker was sometimes located at low / medium frequency range sites to accurately denote station passage.
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| 8. | Observe that for medium frequency you need less contrast than for high or low frequency to detect the sinusoidal fluctuation.
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| 9. | Another style of division considers low frequency to be under 1 kHz, and medium frequency at between 1 10 kHz.
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| 10. | The AQS-13 systems are all primarily active sonar transmitting in the upper end of the medium frequency sonar range.
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