Method for calibrating a testing apparatus

Details Method for calibrating a testing apparatus Method for calibrating a testing apparatus

2005-09-20

2005-09-20

Craver, Charles (Department: 2682)

Telecommunications

Transmitter and receiver at separate stations

Having measuring, testing, or monitoring of system or part

C455S424000, C455S226200, C455S226400

Reexamination Certificate

active

06947709

ABSTRACT:
A method for frequency calibration of attesting apparatus for testing or mobile terminals, such as mobile or cellular telephones, provided for operation in a mobile communication net includes testing apparatus that listens to an established communication based on a data communication between the mobile terminal and the mobile telecommunication net. Information signals underlying the communication are at least partially sampled and evaluated by the testing device. Based on this evaluation, a reference frequency unit incorporated in the testing device is calibrated. Preferably, bursts of the mobile terminal establishing the data communication are analyzed by testing apparatus as the information signals.

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