GUI reference
R&S
®
ZNB/ZNBT
576
User Manual 1173.9163.02 ─ 62
It is essential to perform the calibration with the same "Frequency Offset" settings as
for the actual measurement; otherwise the calibration is deactivated ("Cal Off"). If there
is a mismatch, the
provides additional information.
Parallel Measurement with Frequency Offset
Enables/disables a frequency offset in parallel measurements.
For segmented sweeps, the parallel measurements are performed segment per seg-
ment. If the
is specified as a "Bandwidth Factor" and the segments use
different measurement bandwidths, then the resulting frequency offsets are also differ-
ent.
Note:
If both "Parallel Measurement with Frequency Offset" and
"Auto" is
active, automatic switches between small and large IF gain during the sweep can lead
to visible steps in the measurement results. Select a fixed AGC mode ("Low Dist" or
"Low Noise") to suppress this effect.
Remote command:
SOURce<Ch>:GROup<Grp>:SIMultaneous:FOFFset:STATe
Minimum Offset
The "Minimum Offset" can be specified either as an absolute value ("Direct Value") or
as a multiple of the measurement bandwidth ("Bandwidth Factor").
Remote command:
SOURce<Ch>:GROup<Grp>:SIMultaneous:FOFFset:MOFFset:MODE
SOURce<Ch>:GROup<Grp>:SIMultaneous:FOFFset:MOFFset:DVALue
SOURce<Ch>:GROup<Grp>:SIMultaneous:FOFFset:MOFFset:BWFactor
State indication warning
When attempting to activate the "Parallel Measurement with Frequency Offset" (i.e. on
closing the "Define Parallel Measurement" dialog with the "OK" button), the VNA Firm-
ware checks whether the requested settings are technically feasible. If not, the firm-
ware disables parallel measurement (i.e. the measurements are performed one after
the other) and generates a warning message indicating the current configuration prob-
lem.
In particular, activation is rejected if:
●
the start frequency is < 31 MHz
●
the measurement bandwidth is > 100 kHz
●
the resulting frequency offset (i.e. the minimum frequency offset, rounded to a mul-
tiple of the current frequency step size) would be too high
●
the port groups are configured with different frequency conversion settings
Channel Config softtool
