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System for maintaining receiver/transmitter synchronization with two-way pagers

  • US 5,760,705 A
  • Filed: 09/01/1995
  • Issued: 06/02/1998
  • Est. Priority Date: 09/01/1995
  • Status: Expired due to Fees
First Claim
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1. A two-way paging system, comprising:

  • (a) a transmitter for generating frames having pages the transmitter including first timing means;

    (b) a plurality of personal paging units that receive pages from the transmitter, and which generate response signals at predetermined time periods specified in the frames;

    (c) a receiver having first and second receiving circuitry, the first receiving circuitry receiving radio signals from the personal paging units, and the second receiving circuitry receiving radio signals from a source other than the personal paging units, the receiver also including second timing means distinct from the first timing means; and

    (d) first data processing means, electronically linked with the first and second receiving circuitry in the receiver, for identifying the radio signals and their source by determining the time periods during which the radio signals are received from the personal paging units by the first receiving circuitry, based on radio signals received from the other source by the second receiving circuitry the first data processing means configurable to synchronize the second timing means with the first timing means.

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