Rohde & Schwarz 1145.1010.04/05/06, Operating Manual

Page: 263 / 813

R&S
®
ZVA/ZVB/ZVT Trace Menu
1145.1084.12 4.101 E-6
•
Bandpass Search Ref to Marker activates the search for a bandpass region in the active trace,
starting at the position of the active marker.
Bandfilter mode can be selected for a broad range of measured quantities (Trace – Measure),
provided that the display format is dB Mag. To obtain real filter parameters, the measured
quantity must be a transmission S-parameter and a frequency sweep must be performed. For
other quantities (e.g reflection parameters), the Bandfilter functions are still useful to analyze
general trace properties. In some display formats (e.g. Phase) the bandfilter search is disabled.
Bandpass Search Ref to Max
Activates the search for a bandpass region on the active trace and activates bandfilter Tracking . A
bandpass region is the tallest peak in the search range with a minimum excursion specified by means
of the
x dB Bandwidth parameter.
When Bandpass Search is activated the analyzer uses (or creates) the four markers Mkr 1 to Mkr 4 to
locate the bandpass region:
•
Mkr 1 indicates the maximum of the peak.
•
Mkr 2 indicates the point on the left edge of the peak where the trace value is equal to the
maximum minus x dB Bandwidth.
•
Mkr 3 indicates the point on the right edge of the peak where the trace value is equal to the
maximum minus x dB Bandwidth.
•
Mkr 4 indicates the center of the peak, calculated as the arithmetic mean value of the LBE and
UBE positions .
For a symmetric peak, the positions of Max and Center coincide.
The band filter search results are displayed in the bandfilter info field.
To search for a bandpass region in the vicinity of the active marker, use Bandpass Search Ref to
Marker.
Remote control: CALCulate<Ch/Tr>:MARKer<Mk>:FUNCtion:BWIDth:MODE BPASs
CALCulate<Ch/Tr>:MARKer<Mk>:FUNCtion:EXECute BFILter