Getting Started
R&S
®
ZNB/ZNBT
71
User Manual 1173.9163.02 ─ 38
The analyzer performs a calibration sweep for the measured quantity S
21
. The
magnitude and phase of the result is displayed in two diagrams, together with the
expected typical result for a through standard. The similarity of real and expected
traces indicates that the Through standard has been properly connected. After the
R&S
ZNB/ZNBT has completed the calibration sweep and calculated the correction
data, the "Apply" button is available.
7. Select "Apply" to close the wizard and apply the system error correction to the cur-
rent channel. A "Cal" label appears in the trace list.
8. Remove the Through standard and connect the DUT again.
3.4.1.4
Evaluating Data
The analyzer provides various tools to optimize the display and analyze the measure-
ment data. For instance, you can use markers to determine maxima and minima on the
trace, and change the display format to obtain information about the group delay of the
transmitted wave.
1. Select TRACE – MARKER > "Mkr 1".
This places "Marker 1" to its default position (center of the sweep range). A marker
symbol (triangle) appears on the trace. The stimulus value (frequency) and
response value (magnitude of the transmission coefficient converted to a dB value)
at the marker position is displayed in the marker info field in the upper right corner
of the diagram.
2. Select the "Marker Search" softtool tab and activate "Min" search.
The marker jumps to the absolute minimum of the curve in the entire sweep range.
The marker info field shows the coordinates of the new marker position.
3. Select TRACE – FORMAT and choose the "Delay" of the transmission coefficient
as displayed quantity.
The group delay represents the propagation time of the wave through the DUT; it is
displayed in a Cartesian diagram. The marker info field shows the frequency and
group delay at the marker position.
Performing Measurements
