VerifEye and QuickEye Analysis Options

Option

Default Value

Description

eye.ampl_bins

200

Number of histogram bins to use for generating the 3D and contour data

eye.auto_extend_step_response

0

By default, the step response is extended only to the end of simulation time. To extend the step response beyond the simulation time, set this option to 1.

eye.normalize_ffe_weights

1

1=Normalize FFE weights (sum of absolute values of all weights equals one)

0=no normalization

eye.num_initial_ui

100

Number of unit intervals (UI) over which the initial transient step response should run after any channel or source delay. For example, with num_initial_ui set to 100 and a UI of 1ns, the initial transient analysis should run for at least 100ns + source delay + channel delay.

eye.q_scale_extrap

1

Q-scale extrapolation:

0=never extrapolate

1=extrapolate only when transmit jitter is present

2=always extrapolate. This setting can minimize noise at the bottom of a VerifEye bathtub curve when no transmit jitter is present.

eye.qe_only_cmf

0

By default, QuickEye stores the eye diagram and the transient-like result. Setting qe_only_cmf=1 turns off the storage of the transient-like result.

eye.resp_tmax

1e-6

Maximum time for the transient step response calculation

eye.sym_step_reponse

0

By default, QuickEye and VerifEye use different rise and fall times. To use the rise time as the fall time, set this option to 1.

eye.ui_bins

100

Number of histogram bins to use for generating the 3D and contour data

eye.verifeye_correlated_crosstalk

0

nonzero=enables VE correlated crosstalk calculation