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PAGER RF TEST JACK

IP.com Disclosure Number: IPCOM000007408D
Original Publication Date: 1995-Mar-01
Included in the Prior Art Database: 2002-Mar-22
Document File: 3 page(s) / 103K

Publishing Venue

Motorola

Related People

Tony Dolezal: AUTHOR [+2]

Abstract

The purpose of the RF pager test jack is to min- imize the testing/troubleshooting and tuning times for pagers. Troubleshooting a pager which has mar- ginal page sensitivity normally requires the testing of several subsystems. Determination of an antenna problem or SOQ injection problem must be made. The unique design of the test jack and various plugs allow separation of antenna and RF input for accu- rate testing and tuning. Use of this test jack would eliminate the need for having to desolder isolation components and solder test cables. Figure 1 shows three spring steel contacts and what the basic jack design would look like. The jack design separates the antenna from the RF amp with plug insertion while providing a ground reference and capacitive tuning. The plug design has three separate contact areas; the tip for RF injection, the middle for ground, and the area furthest from the tip for the antenna response.

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MOlOROLA Technical Developments Volume 24 March 1995

PAGER RF TEST JACK

by Tony Dolezal and Ardeshir Ghasiani

  The purpose of the RF pager test jack is to min- imize the testing/troubleshooting and tuning times for pagers. Troubleshooting a pager which has mar- ginal page sensitivity normally requires the testing of several subsystems. Determination of an antenna problem or SOQ injection problem must be made. The unique design of the test jack and various plugs allow separation of antenna and RF input for accu- rate testing and tuning. Use of this test jack would eliminate the need for having to desolder isolation components and solder test cables. Figure 1 shows three spring steel contacts and what the basic jack design would look like. The jack design separates the antenna from the RF amp with plug insertion while providing a ground reference and capacitive tuning. The plug design has three separate contact

areas; the tip for RF injection, the middle for ground, and the area furthest from the tip for the antenna response.

  When the test jack is designed so that both ends of the antenna are to be inserted as in Figure 2, the antenna would not have to be reflowed or hand soldered. An additional benefit of the second design is the fact that removing the antenna from the cir- cuit allows the technician to accurately analyze the preselector response without having to deal with the interfering antenna response. The type ofplug which is inserted into the jack (eithe...