Key features of this screen are as follows:
Peak Marker
The peak marker is aligned with the largest peak on the trace by default, although it can be moved to neighboring peaks
using the Peak Search controls. The magnitude and location of the peak marker are printed in the top right hand corner
of the graticule.
Peak Search Controls
The Peak Search controls allow the user to move the peak marker left or right to the next peak on the trace.
Note:
When using the Peak Search controls, only those peaks that are above the return loss reference line are
considered. Any peaks below the return loss reference line are ignored.
Return Loss Reference Line
The return loss reference line determines the sensitivity of the Peak Search controls. Any peaks below the reference
line are ignored when moving the marker from peak to peak. To change the return loss reference line setting, touch the
numeric label immediately above the reference line and type in the desired value.
Autoscale
The autoscale control on the iQA allows the user to turn autoscaling on and off on the vertical axis. When the control is
colored blue, autoscaling is active and the instrument adjusts the limits on the vertical axis so that the trace occupies as
much of the screen as possible. The axis limits are updated after every sweep. When the autoscale control is colored
light grey, autoscaling is turned off and the axis limits remain the same until changed by the user. The iPA autoscales by
default and can be adjusted by Zooming and Panning. See Sections 8.4.2.3, 8.4.2.4 and 8.4.2.5 .
Vertical Axis Limits
The start and stop limits on the vertical axis can be changed by touching each limit and typing in the desired value.
Note:
The limits on the vertical axis can only be changed if autoscaling is turned OFF.
Horizontal Axis Limits
The start and stop limits on the horizontal axis can be changed by touching each limit and typing in the desired value.
Distance Units
The units on the horizontal axis of the plot can be toggled between metres and feet by touching the units tag in the middle
of the axis.
Resolution Enhancement On/Off Control
The resolution enhancement control allows the user to toggle between standard resolution mode and enhanced resolution
mode, as shown in Figure 35. When the control is colored light grey, the standard resolution results are plotted. When
the control is colored blue, the resolution-enhanced results are plotted.
Note:
In some cases the instrument may be unable to compute a resolution-enhanced plot. This can occur in high-noise
environments, or with unstable return loss faults. In such situations the resolution enhancement control will be colored
dark grey, and only the standard resolution results will be available.
Operating Manual
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Passive Intermodulation and Return Loss Fault Ranging Device
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