Teledyne LeCroy QPHY-DDR4 - Manual (Page 32)

• tJIT(CL) (P6) subtracts the mean of P4 (tCL(avg)) from all of the tCL values. The minimum value is
the measured value for tJIT(CL), min and the maximum value is the measured value for
tJIT(CL), max.
• tJIT(per) rise (P7) subtracts the mean of P1 (tCK(avg), rise) from all of the tCK rise values. This is
displayed for informational purposes only and correlates to the legacy tJIT(per) measurement.
• tJIT(per) fall (P8) subtracts the mean of P2 (tCK(avg), fall) from all of the tCK fall values. This is
displayed for informational purposes only and correlates to the legacy tJIT(per) measurement.
• tJIT(cc) rise (P9) takes the difference between the clock period of two consecutive cycles for only
the rising edge. This is displayed for informational purposes only and correlates to the legacy
tJIT(cc) measurement.
• tJIT(cc) fall (P10) takes the difference between the clock period of two consecutive cycles for only
the falling edge. This is displayed for informational purposes only and correlates to the legacy
tJIT(cc) measurement.
• tJIT(duty) min (P11) is the minimum value of the difference between minimum tCH/tCL clock period
and the average tCH/tCL. This is the measured value for tJIT(duty), min in mUI.
• tJIT(duty) max (P12) is the maximum value of the difference between minimum tCH/tCL clock
period and the average tCH/tCL. This is the measured value for tJIT(duty), min in mUI.
tJIT(per)_total, tJIT(per)_dj, Clock Period Jitter
tJIT(per) is defined as the largest deviation of any signal tCK from tCK(avg).
After the completion of the tJIT(per)_total and tJIT(per)_dj tests the oscilloscope is in the following
configuration:
Figure 16 - Oscilloscope Configuration after tJIT(per)_total and tJIT(per)_dj Tests
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