| 摘要 |
PURPOSE: A device for automatically compensating an output of a multi-channel digital transceiver is provided to time-divide an output local frequency of a PLL module, and to convert a down-converted IF in a frequency down-converter, thereby automatically compensating a transmission output with a DC voltage passing through a channel filter. CONSTITUTION: A frequency down-converter(207) converts a multi-channel frequency extracted from a directional coupler(206) into a certain IF. A PLL module(212) time-divides a local frequency controlled according to a multi-channel FA(Frequency Allocation), and outputs the divided local frequency to the frequency down-converter(207). Channel filter/power detector(208) passes a specific frequency band only, and converts the passed frequency band output into a DC value. A controller(211) controls transmission output attenuation degrees of an attenuator(204), and controls a gain of a channel synthesizer/CFR(Crest Factor Reduction) portion(201) by using a DC voltage of the passed frequency.
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