Handheld two-way radio with digital selective calling

• US 20020025791A1
• Filed: 03/20/2001
• Published: 02/28/2002
• Est. Priority Date: 03/20/2000
• Status: Abandoned Application

• Current Assignee: John W. Englert, Stephen J. Hoffman
• Original Assignee: John W. Englert, Stephen J. Hoffman
• Inventors: Hoffman, Stephen J., Englert, John W.
• Application Number:
  US09/812,793
• Publication Number:
  US 20020025791A1
• Time in Patent Office: Days
• US Class Current: 455/196.1
• CPC Class Codes: H04B 1/28 the receiver comprising at least one semiconductor device having three or more electrodes

Abstract

A preferred embodiment of the present invention generally comprises a hand-held two-way radio employing digital selective calling. The hand-held two-way radio further comprises a VCO operative to modulate the radio signal frequencies of a guard channel such that the guard channel can be changed by changing the output of the VCO. In addition, the present invention comprises a hand-held two-way radio comprising circuitry operative to function according to the digital selective calling international standards, and a VCO operative to modulate the radio signal frequencies of a guard channel such that the guard channel can be changed by changing the output of the VCO. A fourth embodiment of the present invention comprises a hand-held two-way radio comprising circuitry operative to send and receive GPS data, and a VCO operative to modulate the radio signal frequencies of a guard channel such that the guard channel can be changed by changing the output of the VCO.

Claims

1. A hand-held two-way radio comprising:

a VCO operative to modulate the radio signal frequencies of a guard channel such that the guard channel can be changed by changing the output of the VCO.

2. A hand-held two-way radio comprising:

circuitry operative to function according to the digital selective calling international standards; and

a VCO operative to modulate the radio signal frequencies of a guard channel such that the guard channel can be changed by changing the output of the VCO.

3. A hand-held two-way radio comprising:

circuitry operative to send and receive GPS data; and

a VCO operative to modulate the radio signal frequencies of a guard channel such that the guard channel can be changed by changing the output of the VCO.