the virtual signal generator has 12-channels outputs for linear scanning frequency signal or fixed frequency sine wave excitation signal.
该发生器可以输出相位差可调的12通道线性扫频正弦激励信号或者输出12通道定频正弦激励信号。
therefore, the scanning period is shortened, the scanning frequency and system accuracy are enhanced and the data acquisition reliability is enhanced compared with the prior art.
从而缩短扫描周期,加快扫描频率并提高系统精确度,相对于现有技术使数据采集的可靠性提高。
because characteristic of electron gun job is restricted, scanning frequency included frequency and frequency two concepts.
由于电子枪工作特点限制, 扫描频率包括了行频与场频两个概念.
the 72 sampling points on the circumference of a spare part was set by the automatic detecting system of coaxial degree according to the scanning frequency of the laser sensor.