Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2005-08-02
2005-08-02
Nguyen, Lee (Department: 2682)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S424000, C455S115100, C455S115200, C455S115300, C455S115400, C455S067110, C455S067140, C455S226100, C455S226200, C455S226300, C455S226400
Reexamination Certificate
active
06925301
ABSTRACT:
A method of remotely estimating the functionality of a preamplifier mounted adjacent an antenna at the top of a mast or tower and coupled to a base station via a transmission medium, such as a coaxial cable, includes taking noise and/or signal power measurements at the base station via the coaxial cable for the amplifier when both powered and unpowered. The ratio of the respective noise and/or signal powers, after the receiver noise figure at the base station and the cable loss (estimated or measured) including any connection device loss are accounted for, provides an estimate of the functionality of the amplifier.
REFERENCES:
patent: 5450623 (1995-09-01), Yokoyama et al.
patent: 6131020 (2000-10-01), Oja et al.
patent: 6308065 (2001-10-01), Molinari et al.
patent: 6625428 (2003-09-01), Finnell et al.
Gray Francis I.
Huang Wen
Nguyen Lee
Tektronix Inc.
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