Teledyne-lecroy QPHY-DDR4 Manuel d'utilisateur télécharger pdf (Page 31)

QPHY-DDR4 Software Option

Figure 15 - tCK, tCH, tCL and tJIT(duty) Results

In the Measure section:

• tCK rise (P1) is the period measurement at Vref (0 mV) of Z1 (differential clock signal) on only the

rising edges. The mean value is the measured value for tCK(avg), rise. The minimum value is

the measured value for tCK(abs), rise, min reported in mtCK(avg). The maximum value is the

measured value for tCK(abs), rise, max reported in mtCK(avg).

• tCK fall (P2) is the period measurement at Vref (0 mV) of Z1 (differential clock signal) on only the

falling edges. The mean value is the measured value for tCK(avg), fall. The minimum value is

the measured value for tCK(abs), fall, min reported in mtCK(avg). The maximum value is the

measured value for tCK(abs), fall, max reported in mtCK(avg).

• tCH (P3) is the width measure at Vref (0 mV) of Z1 (differential clock signal) on only the high pulses.

The mean value is the measured value for tCH(avg) reported in mtCK(avg). The minimum value

is the measured value for tCH(abs), min reported in mtCK(avg).

• tCL (P4) is the width measure at Vref (0 mV) of Z1 (differential clock signal) on only the low pulses.

The mean value is the measured value for tCL(avg) reported in mtCK(avg). The minimum value

is the measured value for tCL(abs), min reported in mtCK(avg).

• tJIT(CH) (P5) subtracts the mean of P3 (tCH(avg)) from all of the tCH values. The minimum value is

the measured value for tJIT(CH), min and the maximum value is the measured value for

tJIT(CH), max.

924291 Rev A 31

1 2 ... 26 27 28 29 30 31 32 33 34 35 36 ... 72 73

Pas de commentaire

Teledyne-lecroy QPHY-DDR4 Manuel d'utilisateur Page 31