QuickEye Source Netlist Syntax — Ansoft Designer 7.0 在线帮助文档，Ansys Designer 教程

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QuickEye Source Netlist Syntax

The netlist syntax for the QuickEye Source is:

AEYESOURCExxxx n1 [n2] COMPONENT=EYE_SOURCE
+ VLOW=val VHIGH=val TRISE=val TFALL=val
+ UI=val BPS=val
+ STEP_RESP_NUM_UI=val
+ DCD=val TXRJ=[val ...] TXPJ=[val ...] TXUJ=[val ...]
+ TXCJ='filename'
+ FFE_LOCS=[ locations ]
+ FFE_WEIGHTS=[ weights ]
+ NORMALIZE_FFE=val
+ FFE_COMPUTE_PROBE='probe_name'
+ RESISTANCE=val
+ BITLIST=#bitlist
+ BITFILE='file-reference'
+ RANDOM_BIT_COUNT=val REPEAT_COUNT=val RANDOM_SEED=val
+ PRBS_NO=val
+ PRBS_SEED=val
+ PRBS_INVERT=val
+ PRBS_BITLENGTH=val
+ DO_ENCODING=val
+ HOLD_LAST_BIT=val
+ DELAY=val

n1 is the node connected to the single-ended source. n2 is the second node on a differential source. One of the entries BITLIST, BITFILE, RANDOM_BIT_COUNT, or PRBS_NO must be specified. The entry COMPONENT=EYE_SOURCE is required.

Note

The Eye sources are internally grounded. All terminals should be connected to signal lines, not directly to ground.

**QuickEye Source Parameters**
Parameter	Description	Unit	Default
RESISTANCE	Impedance added in series with Eye Source	Ohm	50
REPEAT_COUNT	Number of times to repeat the random bit pattern. Total bits = (N+1)*RANDOM_BIT_COUNT	None	0
RANDOM_SEED	Seed for RANDOM_BIT_COUNT	None	None
VLOW	Logic low voltage level	Volt
VHIGH	Logic high voltage level	Volt
TRISE	Low-to-high rise time	Second
TFALL	High-to-low fall time	Second
BPS	Bit rate for the source	1/Second	None
UI	Duration of the unit interval. Wehn both UI and BPS are given, UI is used.	Second	None
DCD	Duty cycle distortion (Fraction of UI 0 < DCD < 1).	Second
TXRJ	Transmit Gaussian random jitter (standard deviation). List of values enclosed in brackets.	Second
TXPJ	Transmit Periodic random jitter (amplitude). List of values enclosed in brackets.	Second
TXUJ	Transmit Uniform random jitter (amplitude). List of values enclosed in brackets.	Second
TXCJ	File containing jitter probability density function data. Two-column data specifies times in seconds and corresponding PDF values separated by spaces.	None	None
FFE_TAPS	Number of FFE taps	None	0
FFE_LOCS	Bit locations of FFE taps	None	None
FFE_WEIGHTS	FFE weights	None	None
NORMALIZE_FFE	1=Normalize (sum of absolute values of all weights equals one) 0=No normalization	None	1
FFE_COMPUTE_PROBE	Name of the associated eye probe for FFE	None	None
STEP_RESP_NUM_UI	Number of unit intervals to run step response from	None
DELAY	Delay offset for transition	Second	0
BITLIST	Sequence of ones and zeros	None	None
BITFILE	File containing bit list	None	None
RANDOM_BIT_COUNT	Number of random bits to generate	None	0
PRBS_NO	Size of pseudorandom bit pattern. Integer from 2 to 31. Nexxim randomly runs through all combinations of that many bits.	None	None
PRBS_SEED	Random seed for pseudorandom bit pattern	None	0
PRBS_INVERT	1=invert pseudorandom bit output, 0=no inversion	None	0
PRBS_BITLENGTH	Total number of PRBS bits to generate	None	2^PRBS_NO
HOLD_LAST_BIT	Controls behavior when end of bitstream occurs before simulaition ends 1=hold last bit of sequence 0=repeat sequence This control is added to REPEAT_BIT_COUNT to cover the case where this source is the aggressor and the victim source has a longer bit list than the aggressor’s.	None	0
DO_ENCODING	1=perform 8b10b encoding 0=no encoding	None	0

Here is an example of a netlist entry for an Eye Source:

AEYESOURCE3 Node1 COMPONENT=EYE_SOURCE RESISTANCE=50
+ BITLIST=#1010101010100000111110101010101000001111
+ REPEAT_COUNT=1e6


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