PicoVNA 106 6 GHz Vector Network Analyzer
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© 2017 Pico Technology
pv106ug r1
The trace hold is used to store the maximum or minimum values on the memory trace. Trace hold is
not
available when group delay is displayed.
6.1.5
Limit lines facility
The limit lines facility allows six segments to be defined for each displayed graph. By taking advantage of
the overlapping capability (see below) a maximum of 11 segments can be created The set up window,
shown below, is displayed by clicking
Limit Lines
in the main window.
Overlapping segments
All valid segments entered are loaded in sequence (i.e. segment 1 first) with the each segment loaded
having priority over the previous segment. This feature allows overlapping segments to be loaded. For
example, if segment 1 is specified to cover, say, 400 to 800 MHz, then a second segment can be specified to
a section of this band, for example, 500 to 600 MHz. This would result in a total of three segments—that is,
400 to 500, 500 to 600 and 600 to 800 MHz—even though only two were specified. An example of a complex
11-segment template is shown in the first plot below.
Alarm
An alarm facility is provided with the limit lines. This provides audible warning during a sweep if any
measurement exceeds the limits set. A visible indication of the last measurement and measurement
channel in error is provided on the status panel where normally the calibration type is displayed. In addition a
symbol is drawn on the trace indicating the last error point detected as shown in the second plot below. The
alarm is available for all graph types except Smith plots.
The Limit Lines Set Up allows at least six segments per graph
