| 摘要 |
PROBLEM TO BE SOLVED: To improve radio transmission characteristics by holding transmission output levels constant irrelevantly to radio channel frequencies. SOLUTION: In a transmission output correcting circuit 30, a correction memory 32 stores transmission output correction data set so as to make transmission output levels for every radio channel constant, an address control part 312 generates a readout address at the time of transmission according to radio channel specification data PDATA supplied from a main control part 11 to local oscillators 25 and 26 and supplies it to the correction memory 32, and then transmission output correction data of corresponding radio channel frequency are selectively read out of the correction memory 32. Then the transmission output correction data are converted by a D/A converter 33 into a gain control signal PCONT, which is supplied to a gain control amplifier 221 of a transmitting circuit 22 to correct the transmission output level.
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