Even though the device (DUT) is rapidly varying from standby mode (low current) to the RF transmit state (high current), they are also capable of providing stable voltage output.
即使待测器件(DUT)从待机状态(低电流)到射频发射状态(高电流)进行快速跳变，它们也能够提供稳定的电压输出。
Experimental results shows that the core device of the photon counter-PMT and it's high voltage power supply is not stable, the photon counter can be test and calibrated frequently.
实验结果表明，由于光子计数器的核心器件光电倍增管及其高压电源不很稳定，光子计数器需要经常校验和标定。
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