Question

A receiver has two tuned-circuit stages before the mixer, each with a Q of 75. The signal frequency is 100.1 MHz, and the IF is 10.7 MHz. The local oscillator uses HIF. What is the total IFRR in dB?

          A receiver has two tuned-circuit stages before the mixer, each with a Q of 75. The signal frequency is 100.1 MHz, and the IF is 10.7 MHz. The local oscillator uses HIF. What is the total IFRR in dB?
        

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University Physics with Modern Physics
University Physics with Modern Physics
Hugh D. Young 14th Edition
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A receiver has two tuned-circuit stages before the mixer, each with a Q of 75. The signal frequency is 100.1 MHz, and the IF is 10.7 MHz. The local oscillator uses HIF. What is the total IFRR in dB?
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Transcript

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00:01 Hello everybody here we need to find the image frequency rejection ratio that is commonly known as if r here given is signal frequency is f s i is equal to 100 .1 megahertz intermediate frequency that is i f f is equal to 10 .1 megahertz intermediate frequency that is i f is equal to 10.
00:50 7 megahertz.
00:55 Say carrier frequency is equal to fc now q value is given as 75 now the relation we know f s i is equal to fc plus 2 into i f f f c so from here we get f c is equal to f c is equal to i f f f f so from here we get f c is equal to to f s i minus 2 into i f and putting those values we get fc as 78 .7 and the unit will be megahertz.
01:47 Next p value is equal to f si by fc minus fc by f s i by f si so.
02:01 So 100 0 .1 divided by 78 .7 minus 78 .7 divided by 100 .1...
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