Paging device with test and scan modes

• US 5,235,327 A
• Filed: 05/31/1991
• Issued: 08/10/1993
• Est. Priority Date: 06/01/1990
• Status: Expired due to Term

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Karasawa, Toru, Igarashi, Kazuyuki
• Primary Examiner(s): Yusko, Donald J.
• Assistant Examiner(s): GRAY, ROBERT
• Application Number:
  US07/708,587
• Time in Patent Office: 802 Days
• Field of Search: 340/825.44, 340/825.07, 340/311.1, 340/825.47, 340/825.48, 455/71, 455/151.2, 455/166.1, 455/166.2, 455/161.1, 455/226.1, 455/226.2, 455/226.3, 455/226.4, 455/343
• US Class Current: 340/3.5
• CPC Class Codes: H04W 52/0283 with sequential power up or power down of successive circuit blocks, e.g. switching on the local oscillator before RF or mixer stages
• CPC Class Codes: H04W 88/022 Selective call receivers
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A paging device for receiving information and including a test mode for determining the receiving characteristics of the device and a scan mode for scanning a frequency range within which the information exists in determining the frequency of the information. A receiver within the device for receiving information at a receiving frequency can be set at different receiving frequencies. A control unit sets the receiving frequency during the test mode to a predefined test frequency. The predefined test frequency is determined by the control unit without the device entering the scan mode.

Claims

1. A paging device for receiving information and including a test mode for determining the receiving characteristics of the device and a scan mode for scanning a frequency range within which said information exists in determining the frequency of the information, comprising:

receiving means for receiving said information at a receiving frequency, said receiving means operable for being set at different receiving frequencies;

control means for setting said frequency of said receiving means during said test mode to a predefined test frequency, said predefined test frequency being determined by said control means without said device entering said scan mode; and

means coupled to said control means for conserving energy consumption of said paging device during said test mode.

2. The paging device of claim 1 further including wireless transmitter means for producing said information.

3. The paging device of claim 1, further including switching means for initiating said test mode.

4. The paging device of claim 3, wherein said control means in response to said switching means shifts said receiving means to said test mode.

5. The paging device of claim 1, further including warning means for producing at least two different warnings.

6. The paging device of claim 1, wherein said information includes a first test packet including frequency data corresponding to said predefined test frequency.

7. The paging device of claim 6, further including storage means for storing identification data for identifying said first test packet.

8. The paging device of claim 7, wherein said control means is operable for detecting said first test packet during said test mode based on said identification data of said storage means.

9. The paging device of claim 8, wherein said test mode includes a preparatory stage during which said control means sets said receiving frequency of said receiving means to said predefined test frequency corresponding to frequency data of said first test packet.

10. The paging device of claim 9, further including warning means for producing at least two different warnings.

11. The paging device of claim 10, wherein said warning means produces in response to said control means detecting said first test packet a first of said at least two different warnings representing detection of said first test packet during said preparatory stage of said test mode.

12. The paging device of claim 11, further including a wireless transmitter means for producing said information.

13. The paging device of claim 12, wherein said transmitter means is operable for adjusting the frequency data of said first test packet so as to correspond to an additional predefined frequency within said frequency range which serves as said predefined test frequency.

14. The paging device of claim 13, wherein said information includes a second test packet at said predefined test frequency.

15. The paging device of claim 14, wherein said storage means is operable for storing additional identification data for identifying said second test packet.

16. The paging device of claim 15, wherein said control means is operable for detecting said second test packet based on said additional identification data stored in said storage means.

17. The paging device of claim 16, wherein said test mode includes a main testing stage, said control means is operable for shifting said device to said main testing stage following setting of said receiving frequency at said predefined test frequency and prior to detection of said second test packet by said control means.

18. The paging device of claim 17, wherein said warning means produces in response to said control mean detecting said second test packet a second of said at least two different warning representing detection of said second test packet during said main testing stage of said test mode.

19. The paging device of claim 18, wherein said control means is operable for suspending said receiving operation of said receiving means for a prefixed period of time during said preparatory stage of said test mode.

20. The paging device of claim 19, wherein said control means during said prefixed period of time is operable for changing the receiving frequency at which said receiving means is set.

21. The paging device of claim 20, wherein said control means is operable for shifting from said main testing stage back to said preparatory stage in response to said control means detecting said first test packet during said main testing stage.

22. The paging device of claim 21, wherein said control means upon detecting said first test packet during said main testing stage is operable for suspending said receiving operation of said receiving means for an additional prefixed period of time.

23. The paging device of claim 22, wherein said prefixed period of time and said additional prefixed period of time ar the same.

24. The paging device of claim 22, further including additional control means, said receiving means responsive to said additional control means for receiving said information.

25. The paging device of claim 24, wherein said receiving means based on said additional control means intermittently operates for a first time interval during the preparatory stage and intermittently operates for a second intermittent time interval during the main testing stage.

26. The paging device of claim 25, wherein said second intermittent time interval is shorter than said first intermittent time interval.

27. The paging device of claim 25, further including display means for displaying values representing the receiving characteristics determined during s id test mode.

28. The paging device of claim 27, wherein the values include the number of times said receiving means attempts to receive said second test packet and the number of times said receiving means receives said second test packet during said main testing stage.

29. The paging device of claim 26, further including display means for displaying values representing the receiving characteristics determined during said test mode.

30. The paging device of claim 29, wherein the values include the number of times said receiving means attempts to receive said second test packet and the number of times said receiving means receives said second test packet during said main testing stage.

31. The paging device of claim 27, wherein at least said receiving operation of said receiving means is halted in the absence of a first test packet being detected by said control means within a preset time interval of said preparatory stage.

32. The paging device of claim 31, wherein said display means is operable for displaying different operational modes of said device.

33. The paging device of claim 1, wherein said range of frequencies is between about 87.6 MHz to about 108.0 MHz.

34. The paging device of claim 2, further including switching means for initiating said test mode.

35. The paging device of claim 34, wherein said control means in response to said switching means shifts said receiving means to said test mode.

36. The paging device of claim 4, further including warning means for producing at least two different warnings.

37. The paging device of claim 35, further including warning means for producing at least two different warnings.

38. The paging device of claim 4, wherein said information includes a first test packet including frequency data corresponding to said predefined test frequency.

39. The paging device of claim 38, further including storage means for storing identification data for identifying said first test packet.

40. The paging device of claim 39, wherein said control means is operable for detecting said first test packet during said test mode based on said identification data of said storage means.

41. The paging device of claim 40, wherein said test mode includes a preparatory stage during which said control means sets said receiving frequency of said receiving means to said predefined test frequency corresponding to frequency data of said first test packet.

42. The paging device of claim 38, wherein said transmitter means is operable for adjusting the frequency data of said first test packet so as to correspond to a new frequency within said frequency range which serves as said predefined test frequency.

43. The paging device of claim 42, wherein said information includes a second test packet at said predefined test frequency.

44. The paging device of claim 43, wherein said storage means is operable for storing additional identification data for identifying said second test packet.

45. The paging device of claim 44, wherein said control means is operable for detecting said second test packet based on said additional identification data stored in said storage means

46. The paging device of claim 45, wherein said test mode includes a main testing stage, said control means is operable for shifting said device to said main testing stage following setting of said receiving frequency at said predefined test frequency and prior to detection of said second test packet by said control means.

47. The paging device of claim 14, wherein said warning means produces in response to said control means detecting said second test packet a second of said at least two different warnings representing detection of said second test packet during said main testing stage of said test mode.

48. The paging device of claim 47, wherein said control means is operable for suspending said receiving operation of said receiving means for a prefixed period of time during said preparatory stage of said test mode.

49. The paging device of claim 48, wherein said control " means during said prefixed period of time is operable for changing the receiving frequency at which said receiving means is set.

50. The paging device of claim 49, wherein said control means is operable for shifting from said main testing stage back to said preparatory stage in response to said control means detecting said first test packet during said main testing stage.

51. The paging device of claim 17, wherein said receiving mean is operable for operating during first intermittent time intervals of said preparatory stage and for operating during second intermittent time intervals of said main testing stage, each second intermittent time interval being shorter than each first intermittent time interval.

52. The paging device of claim 1, further including display means for displaying values representing the receiving characteristics determined during said test mode.

53. The paging device of claim 17, further including display means for displaying values representing the receiving characteristics determined during said test mode.

54. The paging device of claim 53, wherein the values include the number of times said receiving means attempts to receive said second test packet and the number of times said receiving means receives said second test packet during said main testing stage.

55. The paging device of claim 9, wherein operation of said receiving means is suspended in the absence of a first test packet being detected by said control means within a preset time interval of said preparatory stage.

56. The paging device of claim 17, wherein operation of said receiving means is suspended in the absence of a first test packet being detected by said control means within a preset time interval of said preparatory stage.

57. A method for testing the receiving characteristics of a paging device, said device operable for receiving information during at least a test mode and a scanning mode and including receiver means for receiving said information and control means for controlling said receiver means wherein during said test mode said receiving characteristics are tested and during said scan mode a frequency range is scanned within which said information exists in determining the frequency of the information, comprising the steps of:

receiving at said receiving means during a preparatory stage of said test mode a first test packet of information including frequency data corresponding to a predefined test frequency;

determining the frequency of said predefined test frequency without entering said scan mode;

setting a receiving frequency of said receiver means for receiving information at said predefined test frequency;

receiving at said receiving means during a main testing stage of said test mode at least one second test packet of information at said predefined test frequency following setting of said receiving frequency at said predefined test frequency;

processing said at least one second test packet of information to determine said receiving characteristics; and

conserving energy consumption of said paging device during said test mode.

58. The method of claim 57, further including producing at least two different warnings representing reception by said receiver means of said first test packet during said preparatory stage and of said second test packet during said main testing stage.

59. The method of claim 58, including storing identification data for identifying said first test packet and said second test packet.

60. The method of claim 59, further including detecting by said control means during said test mode reception of said first test packet and said second test packet based on said identification data.

61. The method of claim 60, further including shifting from said preparatory stage to said main testing stage upon reception of said first test packet.

62. The method of claim 61, further including suspending said receiver operation of said receiving means for a prefixed period of time during said preparatory stage for changing the receiving frequency at which said receiving means is set.

63. The method of claim 62, further including shifting from said main testing stage back to said preparatory stage in response to said control means detecting said first test packet during said main testing stage.

64. The method of claim 63, further including suspending said receiver operation of said receiving means for an additional prefixed period of time upon detection of said first test packet during said main testing stage.

65. The method of claim 57, further including operating said receiving mean during first intermittent time intervals of said preparatory stage and during second intermittent time intervals of said main testing stage, each second intermittent time interval being shorter than each first intermittent time interval.

66. The method of claim 60, further including operating said receiving means during first intermittent time intervals of said preparatory stage and during second intermittent time intervals of said main testing stage, each second intermittent time interval being shorter than each first intermittent time interval.

67. The method of claim 64, further including operating said receiving means during first intermittent time intervals of said preparatory stage and during second intermittent time intervals of said main testing stage, each second intermittent time interval being shorter than each first intermittent time interval.