主板時鐘信號量測

主板時鐘信號量測

Agenda

PowerCrystalClockClock，DDRCLK，PCICLK，

LowFrequencyClock

主板時鐘信號量測

POWER

1.量測表格:PowerCKW1NETNAMEVCC3FigureFigSPECMAX:3.465MIN:3.135STATUS<MAX>STATUS<MIN>UNITV主板時鐘信號量測

POWER

主板時鐘信號量測

POWER

將positionscale儘量調(diào)小

將resolutionscale調(diào)整至200μs開bandwidth:20MHz注意調(diào)整offset使量測圖形集中於屏幕中間量測max,min,mean值Position點儘量調(diào)到整格線記得加上label跑3000筆以上主板時鐘信號量測

CrystalClock

1.量測表格:CrystalClockCKC1NETNAME32KHz(Y6)FigureFigTYPEFreqSPECMAX:32.768655MIN:32.767344STATUSUNITKHz－MeasureVoltage－RiseTime=，F(xiàn)allTime=HighTime=LowTime=Jitter=，CrossVoltage=NOTE：(-10ppm)CKC2NETNAME25MHz(Y5)FigureFigTYPEFreqSPECMAX:25.00075MIN:24.99925STATUSUNITMHz－MeasureVoltage－RiseTime=，F(xiàn)allTime=HighTime=LowTime=Jitter=，CrossVoltage=NOTE：主板時鐘信號量測

CrystalClock

20X32.768/1000000=0.000655Max=32.768+0.000655=32.768655Min=32.768﹣0.000655=32.767344補充：1.Frequencytolerance請參照spec或是零件承證書。2.接上電源處於待機模式量測。3.若無法截取頻率則開機進入BIOS模式量測（PCH、CLOCKGEN）或是接上網(wǎng)路線（LAN）。主板時鐘信號量測

CrystalClock

主板時鐘信號量測

CrystalClock

FrequencyCounter主板時鐘信號量測

Clock

1.量測表格:CKH9NETNAMECK_PBG_CLKINITEMABCDEFFigureFigFig

Fig

FigFigFigTYPEFreqRisetimeFalltimeLowtimeHightimeJitterSPEC100MAX:4MAX:4MAX:5.5MAX:5.5MAX:50MIN:1MIN:1MIN:4.5MIN:4.5MIN:-50STATUS<Max>STATUS<Min>UNITMHzV/nsV/nsnsnsps－MeasureVoltage－Freq=Rise＆FallTime:HighTime=>CrossVoltagePoint；LowTime<=CrossVoltagePoint；Jitter=Highrefernece75%Lowreference25%；CrossVoltage=NOTE：DutyCycle:45%~55%jitter:ICS9FG1200-5Spec參照方式以終端為主，發(fā)送端為副如果終端找不到SPEC則往前一階找CLKGENPCHSIO(SIOSPEC)如果SIO找不到則找PCH，如果PCH找不到才找CLKGEN.主板時鐘信號量測Mainclocksignalinmother-board主板時鐘信號量測ClockGen–Differential/SingleClockHighFrequency–DifferentialClockLowFrequency-SingleClock主板時鐘信號量測Clock主板時鐘信號量測

Clock

CKH9NETNAMECK_PBG_CLKINITEMABCDEFFigureFigFig

Fig

FigFigFigTYPEFreqRisetimeFalltimeLowtimeHightimeJitterSPEC100MAX:4MAX:4MAX:5.5MAX:5.5MAX:50MIN:1MIN:1MIN:4.5MIN:4.5MIN:-50STATUS<Max>STATUS<Min>UNITMHzV/nsV/nsnsnsps－MeasureVoltage－Freq=Rise＆FallTime:HighTime=>CrossVoltagePoint；LowTime<=CrossVoltagePoint；Jitter=Highrefernece75%Lowreference25%；CrossVoltage=NOTE：DutyCycle:45%~55%jitter:ICS9FG1200-5主板時鐘信號量測Frequency取最小值、最大值累積500筆資料)主板時鐘信號量測Rise&Falltime主板時鐘信號量測Rise&Falltime（續(xù)）主板時鐘信號量測Rise&Falltime（續(xù)）主板時鐘信號量測High&Lowtime主板時鐘信號量測Jitter設(shè)要量測的channel1.Jitter：有些是示波器是FilesRunapplicationjitteranalysis3主板時鐘信號量測Jitter數(shù)值調(diào)整到25左右調(diào)整完後執(zhí)行量測Jitter時要記得關(guān)掉累積,且要跑1000筆以上

主板時鐘信號量測DDRClock1.量測表格:1.SPEC:JEDECStandard2.量測點在RAM上主板時鐘信號量測DDRClock主板時鐘信號量測DDR

IIISchematicIntroductionAddressDataVrefClock主板時鐘信號量測CrossVoltage主板時鐘信號量測CrossVoltage設(shè)要量測的channel1.Jitter：有些是示波器是FilesRunapplicationjitteranalysis3

主板時鐘信號量測CrossVoltage量測CrossVoltage時要記得關(guān)掉累積,且要跑200筆以上

調(diào)整resolution至最精密調(diào)整完後執(zhí)行讓波形彼此互相交叉3個點主板時鐘信號量測PCICLK1.量測表格:主板時鐘信號量測PCICLK主板時鐘信號量測PCICLK將橫向的SCALE調(diào)整到只有一個完整的riseedgeb.量測Risingtime依spec設(shè)定RiseTime=0.66V-1.98V，F(xiàn)allTime=0.66V-1.98VPciSpec--Max:4V/ns;Min:1V/ns[(1.98-0.66)/t=4,t=0.33ns],[(1.98-0.66)/t=1,t=1.32ns]主板時鐘信號量測PCICLK將橫向的SCALE調(diào)整到只有一個完整的