Rohde & Schwarz 1145.1010.04/05/06, Operating Manual

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R&S
®
ZVA/ZVB/ZVT SOURce<Ch>:...
1145.1084.12 6.267 E-6
SOURce<Ch>:LPORt<log_port> <phys_port1>,<phys_port2>
Defines a balanced port numbered <log_port>, combining two physical ports <phys_port1> and
<phys_port2>.
A balanced port configuration generally introduces a new set of mixed mode measured
quantities. Therefore the traces must be redefined as a balanced port is created. The easiest
way to avoid any inconsistencies is to delete all traces of the active channel before defining a
balanced port. The analyzer displays an error message if
SOURce<Ch>:LPORt<log_port>
is
used while the channel
<Ch>
still contains a trace with an S-parameter as a measured quantity.
<Ch>
Channel number.
<log_port> Logical port number used to number balanced or physical ports. If
unspecified the numeric suffix is set to 1.
Range [def. unit] One balanced port requires two physical ports, so the maximum
number of balanced ports for an n-port analyzer is n/2 (n even) or
(n – 1)/2 (n odd). If the command is used as a query, then
<log_port> can range up to n (no balanced ports, see example
below). [–]
<phys_port1>,
<phys_port1> Logical port number. The command has no effect if only one
parameter is transferred. Both parameters must be omitted if the
command is used as a query.
Range [def. unit] 1 to n where n is the number of ports of the analyzer. The port
numbers must be different from each other. Moreover, a physical
port cannot be assigned to several physical ports. [–]
SCPI, Command
Types Device-specific, command or query
Example:
*RST; CALC:PAR:DEL 'TRC1'
Reset the analyzer and delete the (default) trace
for channel no. 1.
SOUR:LPOR1 1,2; SOUR:LPOR2 3,4
Assuming that the analyzer provides 4 test ports, combine the
physical ports 1 and 2 to the logical port 1, the physical ports 3 and
4 to the logical port 2.
SOUR:LPOR1?
Query the physical ports assigned to logical port no. 1. The
response is
1,2.
SOUR:LPOR:CLE ALL; :LPOR1?
Dissolve all logical ports and repeat the query. The response is 1:
the logical port no. 1 is identical to the physical port no. 1 .