在上述信号频率范围内，任两相间的相位差在(1 ～99 )T范围内可任意预置，相位差步进1 T, 精度0.1 ；-In the signal frequency range, any phase difference between two phases in (1 ~ 99 ) T can be arbitrary within the preset, phase stepper 1 T, 0.1 accuracy