Keysight N5990A MIPI M-PHY Receiver Test User Guide 29N5990A M-PHY Station 2System ConfigurationM8020A Stand-alone• To use this setup, select M8020A from the Configuration drop-downand leave the Separated Low Speed Generator option unchecked.• This system configuration only requires M8020A. The instrument worksas a Generator and as an Error Detector, if necessary.• It supports three operation modes: Loopback, Offline and Custom BERmode, respectively.• For UniPro Test mode, this configuration is not supported anymore dueto training pattern generation memory restrictions. This is describedbelow in M8020A + DSGA.M8020A + DSGA• To use this setup, select M8020A from the Configuration drop-downand check the Separated Low Speed Generator option.• This system configuration is recommended for the UniPro test mode. Inthis case, the DSGA is used for the DUT configuration and to receivethe frame and error counters, while the M8020A is used to generate thetest pattern as well as the frame and error counter requests. If DUTconfiguration must happen in the same lane, then that will be tested. Itis mandatory to use two switches to alternate the DUT inputs betweenthe two generators.• The advantage of M8020A + DSGA setup with respect to thestandalone M8020A comes from the much lower DSGA data rate. SincePWM data with M8020A is generated by bit multiplication, anddepending on test conditions, the M8020A can run at 9,984 Gbps, thegeneration of the training sequence takes much longer than the DSGA,and the pattern may not even fit into the M8020A instrument'smemory.• The DSGA Error Detector requires that the DUT responses come inPWM Mode, either Bursted or Continuous.N4903B (stand-alone)• To use this setup, select JBERT from the Configuration drop-down andleave the Separated Low Speed Generator option unchecked.• This system configuration only requires the N4903B JBERT. Theinstrument works as Generator and as Error Detector, if necessary.• It supports Loopback, Offline and Custom BER operation modes. TheN4903B stand-alone is not able to operate in UniPro PHY Test Modeand has to be combined with DSGA.
