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[求助] 用lfsr仿真眼图,哪位遇到过这类问题?

[求助] 用lfsr仿真眼图,哪位遇到过这类问题?

局部网表:

* StatEye example circuit
.param BW=10n
.param trf = 'BW*0.01'
.param opfreq = '1/BW'

P1 nd_in1 0 port=1 LFSR (1 -1 0 'trf' 'trf''opfreq' 3 [7, 3, 2, 1])
P2 nd_pin2 0 port=2

.stateye T='BW' trf='0.1*BW' incident_port=1 probe_port=2



运行结果提示:
Transient initialization complete.   Starting statEye analysis.
Warning: [STAT_EYE]  port 1 to port 2 signal propagation below the voltage tolerance, 1e-006

Error: [STAT_EYE error] pulse response acquisition failed.  check the pulse response in tr0 file

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