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Question

A dual-mode cell phone is designed to operate with either cell phone

service in the 900 MHz band or the 1,900 MHz band. The phone uses a superheterodyne receiver with a 500 MHz intermediate frequency for both modes. Calculate the LO frequency (in MHz) and the image frequency (in MHz) for low-side injection when the phone receives a 1,960 MHz signal.
a. 1460 MHz and 960 MHz, respectively


b. 2460 MHz and 500 MHz, respectively


c. 1960 MHz and 960 MHz, respectively


d. 2460 MHz and 1960 MHz, respectively

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