Command Reference
R&S
®
ZNB/ZNBT
1255
User Manual 1173.9163.02 ─ 55
SOURce<Ch>:LPORt<LogPt>
<PhysicalPort>[, <PhysicalPort>]
Assigns the logical port number <LogPt> either to the single-ended physical port
<PhysicalPort1> or to a pair of physical ports <PhysicalPort1>,<PhysicalPort2>, at the
same time defining them as balanced port.
Important:
●
All required logical ports (balanced and single ended) must be created explicitly.
●
A balanced port configuration generally introduces a new set of mixed mode mea-
sured quantities. Therefore the traces must be redefined when a balanced port is
created. To avoid any inconsistencies the analyzer deletes all traces when
SOURce<Ch>:LPORt<LogPt>
is used.
●
For the R&S
ZNB, it is essential to complete the logical port assignment before
defining other port properties such as common or differential mode impedances:
whenever a logical port is created using
SOURce<Ch>:LPORt<LogPt>
, the
parameters of all existing logical ports are reset. For the R&S
ZNBT this is not the
case.
●
For the R&S
ZNBT a balanced port can only be created from ports in the same port
group.
Suffix:
<Ch>
.
Channel number.
<LogPt>
Identifying number of the newly created balanced or single-
ended logical port.
Must be between 1 and the number of physical ports (see
). If unspecified the numeric suf-
fix is set to 1.
Parameters:
<PhysicalPort>
Number of first/only physical port
Range:
1 to number of physical ports
<PhysicalPort>
Number of second physical port (optional), forming a balanced
port with the first physical port.
The port numbers must be different. Moreover, a physical port
cannot be assigned to several logical ports.
Range:
1 to number of physical ports
SCPI Command Reference
