Paging receiver with display for displaying reception state

• US 5,323,147 A
• Filed: 11/26/1991
• Issued: 06/21/1994
• Est. Priority Date: 11/26/1990
• Status: Expired due to Fees

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Shibayama, Hiroaki
• Primary Examiner(s): Yusko, Donald J.
• Assistant Examiner(s): MERZ, EDWARD W
• Application Number:
  US07/798,002
• Time in Patent Office: 938 Days
• Field of Search: 375/106, 375/111, 375/117, 370/47, 370/91, 370/100.1, 455/51.1, 455/51.2, 340/825.44
• US Class Current: 340/7.58
• CPC Class Codes: G08B 5/229 with other provisions not elsewhere provided for
• CPC Class Codes: H04W 88/022 Selective call receivers

Abstract

Disclosed is a radio paging receiver wherein changes from the synchronous state to the asynchronous state and vice versa of a radio receiver are detected, the period of time that the receiver is in the asynchronous state is measured by a timing means and recorded, and the recorded period of time is displayed.

Claims

1. A paging receiver comprising:

receiving means for receiving a radio frequency signal to produce a received signal;

state change detection means responsive to said received signal for detecting a change from a synchronous state to an asynchronous state, or vice versa, of said paging receiver;

timer means responsive to the output of said state change detection means for generating time data which denotes the time of said change;

calculating means for calculating a period of time during which said paging receiving is in the asynchronous state according to said time data;

first recording means for recording said period of time calculated by said calculating means; and

display means connected to said recording means for displaying said period of time stored in said first recording means.

2. A paging receiver as claimed in claim 1 wherein said period of time recorded in said first recording means is a latest period of time during which said paging receiver was in the asynchronous state.

3. A paging receiver as claimed in claim 2 further comprising second recording means for recording data relating to a longest previous period of time during which said paging receiver was in the asynchronous state.

4. A paging receiver as claimed in claim 3 further comprising a comparing means for comparing said latest period of time with said longest previous period of time and wherein said second recording means records the latest period of time as a new longest previous asynchronous period of time if said latest period of time is longer than an old longest previous period of time.