| 摘要 |
PROBLEM TO BE SOLVED: To set the characteristics of a synthesis test signal arbitrarily and to measure various kinds of characteristics accurately by providing a stop part for stopping the control for maintaining the power level of the synthetic test signal constantly from an external instruction. SOLUTION: A plurality of signal generation parts 3 output a code division multi-dimensional connection system modulation signal allocated to each channel, and a signal adder 5 adds it and outputs it as a synthesis test signal. A plurality of level adjustors 4 adjust the power level of the modulation signal of each channel and a level-setting part 17 individually sets the power level of each level adjustor 4. When a power level from a certain signal generator 3 fluctuates, a power level compensation part 15 controls the level of other level adjustors 4 and maintains the power level of the synthetic test signal constantly. A level compensation stop part 16 stops the control for maintaining the power level of the synthetic signal of the compensation part 15 constantly from an external instruction, thus setting the power level of the modulation signal arbitrarily as needed. |
