R&S ZNC3, Руководство пользователя

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Command Reference
R&S
®
ZNC
553 User Manual 1173.9557.02 ─ 13
<DelayTimePhase> Optional entry of delay time or phase for UTHRough standard:
AUTO - the analyzer determines the delay time or phase during
the calibration sweep.
<delay or phase> - entry of the delay time in ps (for non-dispersive
standards) or of the phase at the start frequency of the sweep in
deg (for dispersive standards). If an estimate of the start phase is
entered, the analyzer uses the
calculated value which is closest
to the estimate.
Automatic determination of the phase
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 nec-
essary. The check starts at the first sweep point, using the trans-
mission 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 extrap-
olation and derives an estimate for the DC phase limit. If this DC
phase is in the vicinity of ... -180 deg, +180 deg, ... then the trans-
mission factor with negative phase is adopted. 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]
​
Usage: Setting only
Manual operation: See "Ports and Standards" on page 246
[SENSe<Ch>:]CORRection:COLLect:AUTO <Characterization>, <TestPort>,
<TestPort>...
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.
SCPI Command Reference