Logic controlled tuning signal level and deviation compensation in a radio telephone
AssigneeNokia Mobile Phones Ltd.
InventorsRisto Vaisanen, Aki Leppanen
Life of this patent
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Abstract
Radio telephone tuning information is determined by a measuring computer (20) stored in the memory of the radio telephone (1). A microprocessor (10) receives from the sensors (14) information about the operating temperature, according to which appropriate tuning data is selected from memory. The information is used to adjust signal levels and deviations through logic controlled amplifiers (16, 17). The tuning can be made automatically without opening the casing of the radio telephone.
Claims12
A method for tuning signal levels and deviations in a radio telephone having an adjustable output response means, comprising the steps of:
- connecting external testing equipment to the radio telephone via at least three interfaces, an antenna interface, a low frequency interface, and an auxiliary interface;
- transmitting a test signal from the external testing equipment to the radio telephone via one of the antenna interface and the low frequency interface;
- measuring with the external testing equipment an output response to the test signal, the output response being at one of the antenna interface and the low frequency interface;
- using the auxiliary interface to adjust the output response to the test signal until a desired power level is obtained;
- storing in the radio telephone, via the auxiliary interface, a compensation value relating to an amount of adjustment necessary to obtain the desired output response, the compensation value being for correcting either of the signal level and deviation when the radio telephone is operating.
An apparatus for tuning signal levels and deviations in a radio telephone having an adjustable output response means, comprising:
- (1) external tuning equipment connectable to the radio telephone via at least three interfaces, an antenna interface, a low frequency interface, and an auxiliary interface;
- the tuning equipment including:
- (a) means for generating and transmitting a test signal to the radio telephone via one of the antenna interface and the low frequency interface;
- (b) means for measuring a radio telephone signal at one of the antenna interface and the low frequency interface, the radio telephone signal response to the test signal;
- and
- (c) means for adjusting the adjustable output respnose means of the radio telephone via the auxiliary interface until a desired output response is obtained, the auxiliary interface being between the external tuning equipment and a logic section of the radio telephone;
- and
- (2) means for storing in the radio telephone, via the auxiliary interface, a compensation value related to an amount of adjustment necessary to obtain the desired output response, the compensation value being for correcting either of the signal level and deviation when the radio telephone is operating.
Dependencies are inferred from the claim text.