| 摘要 |
<p>A time division multiple access (TDMA) system radio equipment and a synthesizer output level adjusting circuit are disclosed for causing output level of synthesizer 5 with frequency fluctuation caused by synthesizer switching to be variable in unnecessary guard time of transmission output and at the time transmission transient response by incorporating voltage variable attenuator 4 into synthesizer output. A TDMA system radio equipment switches to use a synthesizer 5 outputting a plurality of frequencies, comprising a voltage variable attenuator 4 in which attenuation amount of output of the synthesizer 5 changes caused by controlled voltage, a counting means for counting such that attenuation amount of the voltage variable attenuator changes with required time and required inclination based on leading timing at the time for transmission, and a voltage generation means for outputting voltage based on counting of the counting means to change attenuation amount of the voltage variable attenuator 4, whereby there is controlled such that output level of the synthesizer 5 rises with required inclination before leading timing at the time for transmission, while output level of the synthesizer gravitates with required inclination after trailing timing at the time for transmission. <IMAGE></p> |
