| 41. | Attached time signal systems generally use audible tones or phase modulation of the carrier wave.
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| 42. | The BBC does not allow the pips to be broadcast except as a time signal.
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| 43. | WWVH time signals can also be accessed by telephone.
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| 44. | It can be heard in the transmission of certain radio time signal stations . digital.
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| 45. | Systems using dedicated time signal stations can achieve accuracy of a few tens of milliseconds.
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| 46. | Early in the 20th century, the Arlington Time Signal broadcast this service to wireless receivers.
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| 47. | This approach is applied for filtering space-time signals.
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| 48. | The gunshots have served as time signals for many generations of old inhabitants of Hong Kong.
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| 49. | Times and frequencies of radio time signals are listed in publications such as Radio Navigational Aids.
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| 50. | Other radio controlled clocks use the time signals transmitted by dedicated transmitters in the shortwave bands.
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