Hello,
I would appreciate if someone could explain how the port definition works in
Seasim, or at least how the configuration file should look like for an s4p file.
The test_example.sea, which works with s12p s-parameters as input, contains the
following rows:
.
.
.
step_portout (9,10) # Differential Rx port
step_portsin (3,4),(1,2),(5,6) # Differential Tx ports
.
.
.
tstone_ports [\
['0', '', 'Gen3 package model'],\
['1', '1', 's12p_Txpkg_642010_b.s12p', '[1,3,5,7,9,11]', '[2,4,6,8,10,12]'],\
['1', '1', 's12p_pin2pin_642010_b.s12p', '[1,3,5,7,9,11]', '[2,4,6,8,10,12]'],\
['1', '1', 's12p_Rx_pkg_642010_b.s12p', '[1,3,5,7,9,11]', '[2,4,6,8,10,12]'],\
]
.
.
.
After reducing the number of ports of the original s-parameters from 12 to 4, I
modified this file as shown below and re-run the simulation:
.
.
.
step_portout (2,4) # Differential Rx port
step_portsin (1,3) # Differential Tx ports
.
.
.
tstone_ports [\
['0', '', 'Gen3 package model'],\
['1', '1', 's12p_Txpkg_642010_b.s4p', '[1,3]', '[2,4]'],\
['1', '1', 's12p_pin2pin_642010_b.s4p', '[1,3]', '[2,4]'],\
['1', '1', 's12p_Rx_pkg_642010_b.s4p', '[1,3]', '[2,4]'],\
]
.
.
.
Seasim fails simulating and generates the error message: "Unknown port
identifiers: (2, 4) 1". The s4p files have ports 1, 2 and 3, 4 strongly
connected or in other words input ports are 1, 3 and output ports are 2, 4.
Thank you in advance,
Cristian
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