Table of Contents
Advertisement
VNA Display Overview
2-3
Marker and Limit Capabilities
Marker Description
A marker is a tool for extracting results from traces (or from trace memory). Eight
independent markers can be assigned to any one trace (or to all traces). User-defined
attributes for a marker include: Marker Type (reference or delta) and Readout Style.
In the marker menu, the markers are selected by using the Marker soft key. Select an active
marker with the rotary knob, arrow keys, or key pad (by pressing the marker number). If you
select a marker that is Off, then this action will automatically turn On the marker and assign
it to the current active trace as a reference marker. After a marker is selected from the Select
Marker List Box, an input parameter window (located in the upper left-hand corner of the
display and using red font text) displays the current location (frequency, time, or distance) of
the marker. The input parameter accepts keypad, rotary knob, or arrow key input to move the
marker to the desired location on the active trace.
Selecting the Readout Style for Each Marker
In the Marker menu, press Readout Style to specify a readout style that differs from the
current graph type, or select "As Graph Type(GT)" to have the marker use the same readout
style as the current graph. For example, if active trace graph type is Log Magnitude, then
default Readout Style is Log Magnitude. You can use Readout Style, however, to select any of
the available styles for your preferences. In addition to "As Graph Type(GT)", these Readout
Style selections include: Log Mag, Log Mag and Phase, Phase, Real and Imaginary, SWR,
Impedance, Admittance, Normalized Impedance, Normalized Admittance, Polar Impedance,
Group Delay, Log Mag/2, Linear Magnitude, and Linear Magnitude and Phase.
Displaying Markers on the Screen
By default, the active marker is displayed on the active trace. Location can be manipulated by
keypad, rotary knob, or arrow key input. Location can also be manipulated by a finger tap on
a touch screen. Additional flexibility is offered either to display the marker readout on the
Trace, Screen, or Table, or to turn Off the display of marker readout information (displaying
only the marker symbol on the trace). Press the Readout Format soft key to make your choice
(refer to
"Readout Format Menu" on page
1. Press Trace to select marker readout on the trace, which overlays the active marker
readout directly on the active trace.
2. Press Screen to select marker readout on the screen, which overlays the active marker
readout at the upper-left corner of the display screen (sweep window).
3. Press Table to select marker readout in the table, which shrinks the display enough to
list marker readouts at the bottom of the display screen. This selection allows easy
viewing of not only the active marker, but of all markers. Note that the color of the
marker readout in the table corresponds to the color of the trace to which it is assigned.
If a marker is set to be on all traces, then the table listing shows that marker readout
for the active trace only.
Vector Network Analyzer MG
6-44).
PN: 10580-00289 Rev. K
2-3 Marker and Limit Capabilities
2-7
Advertisement
Table of Contents
