E7000L SitePROFILER
Handheld Cable/Antenna Analyzer
75
16-2
Setting a Limit Line
Limit lines can be used for setting pass/fail criteria, or simply for the user’s visual reference. Limit failures are
reported whenever a signal is above the upper limit line or below the lower limit line. Two types of limit lines
can be specified: lower limit lines and upper limit lines.
A limit line may consist of a single segment or as many as 40 segments. These limit segments are retained
regardless of the current frequency span of the instrument, which allows the configuring of specific limit
envelopes at various frequencies of interest – without having to re-configure them each time the frequency
is changed.
An upper (MAX) limit will automatically mark red any regions of the measurement that are higher than
specified, and will display a FAIL sign. A lower (MIN) limit will do the same for any regions lower than
specified. To set one or more limit lines on the measurement display, press the
Limit
(#6) datakey or tap the
Limit menu key along the bottom of the display.
Limit function may differ depending on the active measurement mode. For instance, power meter limit lines
appear as borders of a green zone on the meter, indicating the region of “pass” (within-limit) values. The
following instructions apply chiefly to limit function within the Cable Analyzer measurement mode.
Setting a Single Limit Line
1.
First, in the Limit menu, toggle
Limit Test
to ON to display the limit line in red.
2.
Tap the
Single Limit
softkey to open a submenu. Here you can select
MAX
to set an upper limit,
MIN
to set a lower limit, or
OFF
to cancel and return.
3.
Tap
Single Value
to set the limit line’s position. Use the arrow keys, rotary knob, or data keypad to
adjust, then press Enter to confirm.
Setting Multiple Limit Lines
1.
In the Limit menu, tap
Single Limit
and select
OFF.
2.
Tap
Edit Limit
. The display will shrink to accommodate a preview of the current measurement and
a limit table.
3.
Tap
Add
to add a new limit line to the table. From left to right, you can tap each field to adjust it
using the arrow keys, rotary knob, or data keypad. Tap a field once to outline it, and again to edit.
a.
Type:
Choose OFF to turn off the limit, MIN to set an upper limit, or MAX to set a lower limit.
b.
Begin Distance
: Set the distance at which the limit will begin testing for pass/fail. Enter a
value, then select the intended distance unit: km, m, cm, or mm.
c.
End Distance
: Set the distance at which the limit will stop testing for pass/fail.
d.
Begin Amplitude
: Set the amplitude (how high/low) for the start of the limit line. You can use
this feature to set a limit that rises or falls at various points through the measurement.
e.
End Amplitude
: Set the amplitude (how high/low) for the end of the limit line.
4.
Tap anywhere on an unwanted limit line in the table and tap
Delete
to erase it.
5.
You may set up to 20 limit lines. When you are finished, tap
Return
to go back.
Limit Alarm
If active, the Limit Alarm feature notifies the user with a series of audible beeps if the current measurement
exceeds a placed limit line. Simply tap the Limit Alarm softkey to toggle it ON or OFF.
