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c5cfac679b While every effort is made to ensure the accuracy of the information on Radio-Electronics.com, no liability is accepted for any consequences of using it. As the tuning within this block provides all the rejection for the image response, it must be at a sufficiently sharp to reduce the image to an acceptable level. Any noise or random radio station at the image frequency can interfere with reception of the desired signal. Proc. There will be many mixer products (heterodynes). Local oscillator radiation. This second signal can be developed by passing the whole signal through a squaring amplifier.
Image rejection for the second IF is not a major problem because the first IF provides adequate image rejection and the second mixer is fixed tuned. Retrieved 22 October 2013. A 5-tube superheterodyne receiver made in Japan around 1955 . In that situation, the RF amplifier must be tuned so the IF amplifier does not see two stations at the same time. There are two choices for the local oscillator frequency because the dominant mixer products are at fRFfLO. (February 1921). At the cost of an extra frequency converter stage, the superheterodyne receiver provides superior selectivity and sensitivity compared with simpler designs. By the 1980s these had been replaced with precision electromechanical surface acoustic wave (SAW) filters. type Status report.