State Analysis Operation

For proper state analysis the user must choose the correct configuration file to load depending on what type of analysis is desired, such as analyzing both Northbound and Southbound activity or just one direction. The list of configuration files provided is on page 12.

Load the appropriate configuration file and use the General Purpose probe feature for proper cable attachment to the probe, for more information on the General Purpose probe feature please see the section titled “Loading 169xx configuration files and General Purpose Probe feature”. When the configuration file loads the decoder will automatically load providing the software has been properly licensed.

For proper protocol decoder performance you must insure the preferences are set properly. Once the configuration file is loaded go to Tools, select FBDIMM Protocol Decoder -1 and select Preferences. Set the failover modes for the Southbound and or Northbound if necessary. The default settings are set to none. When you choose a Northbound failover mode you must select which lane(s) has failed as well.

Once the configuration file has been loaded and all cables are attached to the probe, the next step is to configure the probe. Please refer to the section of the manual titled “Using the Probe Control Application”. The probe control application allows the user to set different parameters of the probe to allow certain data to be passed through to the analyzer.

Setting Sample Positions

In order to insure that the logic analyzer properly measures the output of the probe, the sample positions for each label need to be set properly. There are 4 “Sample Data” labels defined in each configuration file that group each North and Southbound data signal by its required sample position.

It is recommended that Eyefinder is run on the logic analyzer while the target system is generating consistent traffic on the North and Southbound lanes. The sample positions in the config fields have been preset based on measurements in a test bed at 533MT/s data rates. They may need to be adjusted based on your target system. The following image shows the 4 “Sample Data” labels after an Eyefinder has been run. If there are clear eyes for each label, the user can drag all the blue sample position bars to the far left to aggregate them and then drag the single bar back to the window where it was originally located. If the sample positions are not set correctly then the data shown on the analyzer will not be correct.