R&S ZNL, Руководство пользователя

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Command reference
R&S
®
ZNL/ZNLE
899 User Manual 1178.5966.02 ─ 19
The UOSM algorithm provides the transmission factor of the
unknown through standard up to an ambiguous sign. This yields
the two alternative phase values displayed in the calibration wiz-
ard; see Unknown Through Standard.
In remote control, the analyzer performs a plausibility check in
order to determine the correct phase. No manual selection is
necessary. The check starts at the first sweep point, using the
transmission factor with negative phase. The analyzer measures
the phase at the subsequent sweep points, assuming that the
phase difference between any two consecutive points is less
than 90 deg. From these phase values, the analyzer calculates a
linear extrapolation and derives an estimate for the DC phase
limit. If this DC phase is in the vicinity of ... -180 deg, +180
deg, ... then the transmission factor with negative phase is adop-
ted. If the DC phase is in the vicinity of ... 0 deg, +360 deg, ...
then the transmission factor with inverted sign (corresponding to
a 180 deg phase shift) is adopted.
*RST:
AUTO
Example: See
[SENSe<Ch>:]CORRection:COLLect:SAVE:
SELected[:DUMMy]
or "Adapter removal" on page 1079
Usage: Setting only
Manual operation: See "Start Cal Sweep" on page 486
[SENSe<Ch>:]CORRection:COLLect:AUTO <Characterization>, <TestPort1>[,
<TestPort2>[...]]
Selects and initiates an automatic calibration for the specified test ports using a single,
auto-detected port assignment.
Tip:
●
If the test setup contains a high attenuation, the analyzer may fail to detect the cal
unit ports connected to each of its ports. In this case use the extended command
[SENSe<Ch>:]CORRection:COLLect:AUTO:PORTs
.
●
Use
[SENSe<Ch>:]CORRection:COLLect:AUTO:TYPE
if you want to specify a
particular calibration type for the automatic calibration.
●
If several calibration units are connected, use
SYSTem:COMMunicate:RDEVice:
AKAL:ADDRess
to select a unit for the calibration.
Suffix:
<Ch>
.
Channel number of the calibrated channel
Setting parameters:
<Characterization> Location of the characterization (cal kit file) to be used for the
automatic calibration (string parameter):
–
If an empty string (
' '
) is specified, the factory cal kit file
stored in the active calibration unit is used.
VNA command reference