The last digit serves as an accuracy check on the entire number by scanning devices 標(biāo)準(zhǔn)碼及縮短碼均只有一個(gè)數(shù)字字元。
Frequency accuracy check at 6 different frequency settings at one voltage level ( normally at 1 v ) 一個(gè)電壓電平(一般為1v )六個(gè)不同頻率的頻率準(zhǔn)確度檢查。
Additional internal amfm modulation accuracy check on the same unit ( maximum carrier frequency limited to 1 . 3 ghz ) 檢測(cè)儀器的本身調(diào)幅及調(diào)頻的內(nèi)調(diào)制功能的準(zhǔn)確度(最高載頻不超過1
Additional voltage measurement at other frequency settings as well as frequency accuracy check may be offered at extra charge 本所亦可提供在其他頻率的電壓測(cè)量服務(wù)及頻率準(zhǔn)確度檢查,但須另行收費(fèi)。
The calibration of a frequency ( time interval or period ) counter will basically include timebase calibration , and frequency ( time interval or period ) measurement accuracy check at 6 different test points . calibration at additional test points can be arranged on demand 一個(gè)頻率計(jì)(時(shí)距計(jì)或周期計(jì))的校正工作基本包括時(shí)基校正及按六個(gè)不同測(cè)試點(diǎn)進(jìn)行頻率(時(shí)距或周期)準(zhǔn)確度的檢查。額外試點(diǎn)的校正服務(wù),可應(yīng)要求而安排。
At last , it deduced a new improvement method from the theories , and make use of a new physical concept ? the independent of speed function for accuracy checking up the turns sub - position and the communication point so as to control sensorless brushless dc motor with the breadth regulating - speed scope from zero to high speed . based on the function , it will research the new control method 最后,從理論上推導(dǎo)了新的改進(jìn)方法,并利用一個(gè)新的物理概念? ?與速度無關(guān)的位置函數(shù)g ( ) ,其能高精度檢測(cè)出轉(zhuǎn)子位置和換相點(diǎn),以此來控制無刷直流電機(jī),實(shí)現(xiàn)電機(jī)從零轉(zhuǎn)速到高轉(zhuǎn)速的寬速度范圍調(diào)節(jié),在此基礎(chǔ)上研究了應(yīng)用這種新的位置函數(shù)的控制策略。