100 Keysight N5990A MIPI M-PHY Receiver Test User Guide4 CalibrationsWhen the DSGA is used, two calibrations are required at each data rate:one for Data0 and another one for the other channels. The calibration forData0 includes the switch. For the other channels, Data1 is calibratedwithout switch.ProcedureFor Gear 1 & Gear2 calibrations, the Keysight SATA II ISI channel(N4915-60001) can be used. The 3 Gb/s trace length (535 mm isrecommended) is compatible with the M-PHY specification requirements.For Gear 3 and Gear 4 calibrations, there is no a specific ISI trace defined.The channel must meet the requirement of the Reference CH1 channeldefined in the M-PHY specification (last version 4,10). Instead of using aphysical ISI channel, embedded ISI of M8020A can be used, if available.The data generator sends a continuous CJTPAT pattern at the selectedHS-Gear data rate. The ISI is then measured and stored.Connection DiagramFigure 55 to Figure 58 show the connection diagrams for the differentsystem configurations.Figure 55 Connection Diagram for ISI Calibration (for M8020A)NOTE The connection diagrams shown are for Gear1. They are the same forGear2 and Gear 3, but vary in the TTC value (G1: 250ps; G2: 125ps; G3and G4: 60ps).
