Altera JNEye User Manual
Page 74
• Location—For multiple channel/lane S-parameters simulating crosstalk effects, you must specify the
aggressor location. For example, the above figures show four possible crosstalk configurations from a
12-port S-parameter model. Use the Aggressor Location menu in the Channel Wizard to change the
aggressor location. The Aggressor ID field is ignored for a victim channel (Loss type).
Note: The Aggressor ID index excludes victim lanes. For example, in a 12-port S-parameter, there are
three lanes. If the middle lane (Lane ID 2) is a victim lane, the two aggressor channels have
Aggressor ID 1 and 2, not 1 and 3.
• Relative Amplitude—Each crosstalk aggressor can have different aggressor amplitude relative to its
original amplitude. The default value for aggressor is 1.0, which indicates the aggressor has its original
amplitude. The Aggressor ID field is ignored for a victim channel (Loss type).
• Delay—Each crosstalk aggressor can have individual delay or time offset. The delay is input in picosec‐
onds (ps, 10
-12
second). Positive values in aggressor delay indicate the aggressor is lagging behind the
victim waveform. Negative values indicate the aggressor is ahead of the victim signal waveform. The
Aggressor ID field is ignored for a victim channel (Loss type).
• Frequency Offset—Each crosstalk aggressor can run on an offset frequency compared to the victim
channel’s transmitter. The frequency offset is given in negative ppm (parts per million). The maximum
frequency is –950,000 ppm.
The Channel Viewer button is a convenient way of observing channel characteristics in the current
channel list. Click Channel Viewer to transfer the channels to a new Channel Viewer window. You can
then observe various parts of channel characteristics in either frequency- or time-domain. Use the JNEye
Channel Viewer to view cascaded channel characteristics if multiple channel components are used in the
victim signal path. The following figure illustrates the Channel Viewer plot of the channel construct
2-68
Channel Setting
UG-1146
2015.05.04
Altera Corporation
Functional Description