Modem device and amplitude adjustment method
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United States of America Patent
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Nov 25, 2014
Issued Date -
N/A
app pub date -
May 30, 2011
filing date -
Jun 24, 2010
priority date (Note) -
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Abstract
A modem device includes a modulation unit 12 that generates a modulated signal, a frequency conversion unit 15 that generates an intermediate frequency signal from an external input signal, and a demodulation unit 14 that demodulates the modulated or intermediate frequency signal and generates a reception signal. In a communication mode, the modulation unit 12 outputs the modulated signal to a external device 50, the frequency conversion unit 15 generates the intermediate frequency signal, and the demodulation unit 14 demodulates the intermediate frequency signal and generates the reception signal. In an adjustment mode, the modulation unit 12 outputs the modulated signal to the demodulation unit 14, and the demodulation unit 14 generates the reception signal from the modulated signal and adjusts an amplitude of the transmission signal based on the reception signal.
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