(cross-posted to ATM and Editorial task group mailing lists)
The IBIS 6.1 document has some minor bugs related to equations and related
definitions. In several places, key distinctions are made between an ideal or
incoming time or voltage waveform and an output time or waveform after
modification by a jitter or noise term. However, for Rx_Noise, the following
appears:
Other Notes: Time is calculated as follows:
wave(t) = wave(t) + Rx_Noise * gaussian_rand()
Where wave(t) is the waveform returned by Rx AMI_GetWave
I believe this was intended to read (changes in color, if passed through by the
reflector):
Other Notes: The output voltage waveform is calculated as follows:
output_wave(t) = wave(t) + Rx_Noise * gaussian_rand()
Where wave(t) is the waveform returned by Rx AMI_GetWave and output_wave(t) is
the waveform returned by the EDA tool
Is this correct?
I also note that the ranges for rand() and gaussian_rand() are well-defined for
the Tx_Rj and Tx_Dj jitter terms, but are not defined at all for other terms,
such as noise and Rx jitter, later in the document. I would suggest moving the
definitions to the introduction of the Jitter and Noise Reserved Parameters
section, rather than keeping it in the definitions for individual parameters.
- MM
