Statistical Analysis Results
Results to View
These are the results data from the Statistical Analysis phase of the analysis. There is a table of data as well as waveform data to view.
Result  Description 

BER  Shows the statistical eye, data bathtub, and clock PDF. 
Statistical Eye  Shows the statistical eye. 
Bathtub  Shows the data bathtub curve, the clock PDF, intersection of the two (Net BER), or all three. 
Vertical Bathtub  Shows the vertical (voltage) bathtub curve at the average clock time (0.5UI) or at a user defined (UI). 
DJ  Shows the deterministic jitter probability density function. 
Contours  Shows the eye contours. The node names identify the inner and outer eye contours. The contours are shown for the target BER values. 
Crosstalk  Shows the statistical eye of the crosstalk and noise at the receiver. For more information, see Model Jitter and Noise While Designing Serial Link or Model Jitter and Noise While Designing Parallel Link. 
Impulse Response  The impulse response of the analog channel, equalized channel, or both. 
Step Response  The step response of the analog channel, equalized channel, or both. 
Pulse Response  The pulse response of the analog channel, equalized channel, or both. 
Aligned Pulse Response  Shows the pulse response shifted in X and Y. The shifts are made as follows:

Transfer Function  Transfer function of the analog channel, equalized channel, or both. 
Probed Statistical Eye  Statistical eye at the probed location(s) of the prelayout schematic. In case of a parallel link project, the result represents the statistical eye at the receiver B node. 
Probed Contours  Eye contours at the probed location(s) of the prelayout schematic. In case of a parallel link project, the result represents the eye contours at the receiver B node. 
Probed Crosstalk  Crosstalk eye at the probed location(s) of the prelayout schematic. In case of parallel link project, it is the crosstalk eye at the receiver B node. 
Probed Impulse Response  Impulse response at the probed location(s) of the prelayout schematic. In case of parallel link project, it is the impulse response at the receiver B node. 
Probed Step Response  Step response at the probed location(s) of the prelayout schematic. In case of parallel link project, it is the step response at the receiver B node. 
Probed Pulse Response  Pulse response at the probed location(s) of the prelayout schematic. In case of parallel link project, it is the pulse response at the receiver B node. 
Probed Transfer Function  Transfer function at the probed location(s) of the prelayout schematic. In case of parallel link project, it is the transfer function at the receiver B node. 
Note
The Stat mode in the Parallel Link Designer app does not support userdefined probes but does add a single probe at the Receiver BNode.
Node Locations
The full node names in statistical analysis contain the designator names. For example, VTX1 is the V node for the designator TX1.
Table Column Definitions
Parameter  Definition 

Transfer Net  Name of the transfer net for the simulation. 
Transfer  Bus transaction (designator fromto) for the simulation. 
UI (ps)  Unit interval for the transmitted data, defined as the time duration for a single transmitted symbol. 
Symbol Rate (Gbps)  Rate at which symbols are transmitted on the channel. The delivered payload UI can be lower for an encoding such as 8b10b is used, or higher for a modulation such as PAM4 is used. 
Stat BER  Average bit error as predicted through statistical analysis. 
Stat BER Floor  Minimum bit error rate at any point on the bathtub curve derived from statistical analysis. 
Stat RJ (ps)  Standard deviation of Gaussian distributed clock to data offset as measured at
the receiver decision point. Calculated as the RMS sum of the AMI parameters
Rx_Clock_Recovery_Rj , Rx_Clock_Recovery_Dj ,
Rx_Clock_Recovery_Sj , and
Rx_Clock_Recovery_DCD . If none of these AMI parameters are
present, this value defaults to 0 ps. 
Stat Timing Offset  Mean of the clock to data offset as measured at the receiver decision point. An offset of zero indicates that the data is being sampled exactly at the center of the data eye. This parameter can also be called the static timing offset. 
Stat Path Delay  The path delay of a data pulse, as detected by clock recovery during statistical analysis. Note If the algorithmic models use different delay values in statistical and time domain modes, then this parameter does not have the same value as the path delay determined during time domain simulation. 
Stat Eye Height  Height of the target bit error rate contour at the average clock time. For more information, see Eye Measurement and Reporting. 
Stat Eye Margin  Voltage measured from the sensitivity threshold to the target BER contour at the average clock time. For more information, see Eye Measurement and Reporting. 
Stat Eye Outer Height  Maximum voltage measured on the outer eye. This parameter represents the maximum voltage measured on the zero outer contour. For more information, see Eye Measurement and Reporting. 
Stat Eye Width  Total width of the target bit error rate contour at the ideal decision threshold. For more information, see Eye Measurement and Reporting. 
Stat Setup Time  Time between the sensitivity threshold crossing at the early edge of the target bit error rate contour and the average clock time. 
Stat Hold Time  Time between the average clock time and the sensitivity threshold crossing of the late edge of the target bit error rate contour. 
Stat DJ Peak (UI)  Maximum deviation from the median zero crossing time for all zero crossings in the statistical eye. 
Stat DJ Sigma (UI)  Standard deviation of all zero crossing times in the statistical eye. 
Eq Signal/Xtalk (dB)  Ratio of equalized signal energy to the combined equalized energy of all of the crosstalk aggressors, as measured at the input to the receiver decision circuit. An equalized signal to crosstalk ratio of 23 dB should be safe for a target BER of 10^{12}, and a ratio of 27 dB should be safe in general. Any signal to crosstalk ratio less than 23 dB should be investigated in detail, and will most likely not meet performance requirements. 
Total Xtalk (Vrms)  RMS amplitude for the combination of all of the crosstalk aggressors. 
Stat Unequalized Nrg  Unequalized energy representing the amount of energy in the equalized impulse response that is not equalized out. 
Tx Level (V)  Maximum absolute value of the differential output voltage of the driver, measured when driving a load whose impedance is equal to the output impedance of the driver. 
Amplitude Noise (Vrms)  Standard deviation of the Gaussian distributed amplitude noise as measured at the receiver decision point. 
Simulation  The name of the simulation file for the simulation. 
CORNER  The process corner for the simulation. For more information, see Specify Corner Conditions in Serial Link Design or Specify Corner Conditions in Parallel Link Design. 
Bit_Sequence_Set  The bit sequence set used in the analysis. 
Network Characterization  Simulation type for network characterization. 
Time Domain  Simulation type for time domain analysis. 
COLUMN  Specific group name and value number used in the simulation. This is valid when there are variation groups in the solution space. 