Procedure; Connection Diagram - Keysight Technologies N5990A User Manual

Procedure

Connection Diagram

Keysight N5990A MIPI M-PHY Receiver Test User Guide
Unlike the "ISI Calibration" that only measures the ISI generated by the
selected ISI trace, the "Embedded Fixture ISI Calibration" is used to find
the optimal insertion loss configuration that gets an ISI closest to the
target.
This calibration should be run for each gear configured to Automated
preset (see Figure 59).
When the DSGA is used, two calibrations are required at each data rate:
one for Data0 and another one for the other channels. The calibration for
Data0 includes the switch. For the other channels, Data1 is calibrated
without the switch.
The data generator sends a continuous CJTPAT pattern. Then, it does a
sweep of the insertion loss at the second frequency point that is set to
4.992GHz. At each step, the ISI is measured and stored. The insertion loss
is increased by the defined "Step Size" until the "Target ISI Value" is
reached.
Refer to the connection diagrams shown in
Figure 60 Connection Diagram for Embedded ISI Calibration (for M8020A)
Calibrations
Figure 60 and Figure 61.
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