Signal processing circuit for radio comprehensive test instrument
A technology of signal processing circuit and comprehensive tester, applied in electrical components, transmission monitoring, transmission system and other directions, can solve problems such as inability to measure
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[0017] According to the attached figure 1 , attached figure 2 A brief description is given of the specific embodiments of the present invention.
[0018] A signal processing circuit for a radio comprehensive tester, comprising a control module 1 (specifically using an ICETEK-OMAPL138-KB chip), an intermediate frequency generation module 3, an intermediate frequency measurement module 2, an audio generation module 5, and an audio measurement module 4;
[0019] Described intermediate frequency generation module 3 is connected with described control module 1 by SPI bus, and it is used to generate the intermediate frequency of designated frequency according to the order of control module 1 and output; In the present embodiment, intermediate frequency generation module 3 adopts the single-chip DDS of Maxim Corporation chip and its peripheral circuits; the main peripheral circuits of the DDS chip include reference signal source, control, loop filter and output low-pass filter, etc...
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