Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Using portable test set
Patent
1993-02-09
1995-03-14
Chin, Stephen
Telephonic communications
Diagnostic testing, malfunction indication, or electrical...
Using portable test set
379 1, 379 32, 379 34, 379 58, 379 59, 455 331, 455 671, 455 673, 4551613, 4552262, H04M 124, H04M 308, H04M 322, H04M 1100
Patent
active
053982762
ABSTRACT:
A manually-movable, portable, cellular-system signal-strength analyzer for measuring, recording and displaying geographically-located, downlink, cellular-communication-channel signal strengths in non-vehicular pedestrian areas and also inside buildings. The analyzer has a cellular-telephone scanning receiver housed within a backpack that is worn by a human operator who traverses the areas to be analyzed. A height-adjustable antenna mast formed from a set of telescoping tubes is fixed to the exterior of the backpack. This mast supports a self-resonant antenna of fixed length whose elevation height may be varied to determine signal-strengths at different pedestrian heights. The backpack also houses a controller. A laser rangefinder which has a built-in compass inputs data to the controller concerning the geographic locations of various points traversed by the analyzer. An arm-held computer is also connected to the controller. The computer has a display and a "pen" for manual writing on the display to input data and instructions to the analyzer. The computer records and displays the signal strengths of the selected cellular-communication channels for various geographically located points throughout the areas traversed.
REFERENCES:
patent: 4868885 (1989-09-01), Perry
patent: 4977399 (1990-12-01), Price et al.
patent: 5023900 (1991-06-01), Tayloe et al.
patent: 5193216 (1993-03-01), Davis
patent: 5239666 (1993-08-01), Truby
patent: 5239684 (1993-08-01), Ishikura
Lemke Kurt T.
Schifferdecker Joseph A.
Chin Stephen
Douvas Augustus G.
Loomis Paul
SAFCO Corporation
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