Keysight N5990A MIPI M-PHY Receiver Test User Guide 183HS Tests 5ProcedureBefore running this test, the jitter stress elements such as RJRX , DJRX ,STRJRX , ISI, and STDJRX should be calibrated. During the calibration of thetest signal, these jitter sources are tested over a range to achieve themaximum values that are defined in the specification. For this test, theDUT receives a CJTPAT pattern with sufficient levels of DJ and RJ and sentthrough the ISI test channel to meet the specified TJRX levels. The TotalJitter is the jitter value at the DUT Rx pins, including the jitter coming fromthe ISI Trace and is calculated as follows:For HS-G1 and HS G2:• The STDJ is made of ISI from the trace and STSJ to a total of 0.2 UI,that is, STSJ = 0.2 - Calibrated ISI.• STTJ = STDJ + STRJ = 0.30 UI -> STRJ = 0.30 UI - 0.2 UI -> STRJ = 0.1UI.• DJ = STDJ + LFSJ = 0.35 UI -> LFSJ = 0.35 UI - 0.2 UI -> LFSJ = 0.15UI.• TJ = DJ + RJ = 0.52 -> RJ = 0.52 UI - 0.35 UI = 0.17 UI.For HS-G3:• The STDJ is made of ISI from the trace and STSJ to a total of 0.2 UI,that is, STSJ = 0.2 - Calibrated ISI.• DJ = STDJ + LFSJ = 0.35 UI -> LFSJ = 0.35 UI - 0.2 UI -> LFSJ = 0.15UI.• For CH-G3 case, the low frequency RJ component is eliminating, sothat the entire TJ budget is allotted to wideband RJ, above 10MH:TJ = DJ + RJ = 0.52 -> RJ = 0.52 UI - 0.35 UI = 0.17 UI? RJ = STRJ = 0.17UI• Accordingly, the STTJ is greater than for HS-G1 and HS-G2:STTJ = STDJ + RJ = 0.2 UI + 0.17 UI = 0.37 UIFrom these values and using the Eye Opening calibration with jitter toadjust the LFSJ if necessary, the resulting eye width is within +/- 5% of theconformance value (520mV). Then, the same calibration is used to set theeye height according to the specification (43mV for Gear 1 and 2; 45mV forGear 3 and Gear 4).For spec 3.1, this test shall be performed with a Frequency Offset of +2000for B-series rate and -2000 ppm for A-series rate according to the nominalbit rate for the gear and data rate. For spec 4.1, this test is only mandatoryfor B-series (for A-series, the procedure is shown in the test tree as
