Anritsu Spectrum Master MS2720T, User Manual

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3-19 Limit Menu Interference Analyzer (Option 25)
3-84 PN: 10580-00349 Rev. H Spectrum Analyzer MG
[Limit] Edit Menu
Key Sequence:
Shift > Limit
(
6
) key
> Limit Edit
Frequency: Press this submenu key to set the frequency of a limit line
inflection point. The frequency of each inflection point in a limit line can be
individually set. When a new point is added, it takes on a value halfway
between two existing points, or it takes on the stop frequency of the current
sweep if no point is higher in frequency than the one being added. See the
Add Point submenu key description for more details. Use the keypad, the left
or right arrow keys, or the rotary knob to change the frequency of an inflection
point. The left or right arrows move the inflection point by 5% of the span.
Amplitude: Press this submenu key to set the amplitude of a limit line
inflection point. The amplitude of each inflection point can also be individually
set. By default, when a new point is added, it takes on the amplitude that is on
the limit line at the frequency where the point was added. Use the keypad
(using the ± key to set a negative value), the up or down arrow keys, or the
rotary knob to move the point to the desired value. The unit of the amplitude
limit is the same as the current vertical amplitude unit. See the Add Point
submenu key description for details. The up or down arrows move the
amplitude by 5% of the screen height.
Add Point: Press this submenu key to add a limit line inflection point. The
precise behavior of this submenu key depends upon which inflection point is
active at the time that the key is pressed. If the active limit point is somewhere
in the middle of a multi-segment limit line, then a new limit point is added that
is halfway between the currently active point and the point immediately to its
right. The amplitude of the inflection point will be such that it falls on the limit
line. For example, if a limit point exists at 2.0 GHz with an amplitude of
–30 dBm, and if the next point is 3.0 GHz with an amplitude of –50 dBm, then
the added point will be at 2.5 GHz with an amplitude of –40 dBm. The
frequency and amplitude values of the new point can be adjusted as needed
with the Frequency and Amplitude submenu keys.
If the last limit point is active (assuming it is not at the right edge of the
display), then the new limit point will be placed at the right edge of the display
at the same amplitude as the point immediately to its left. Points may not be
added beyond the current sweep limits of the instrument.
Figure 3-78. IA Limit Edit Menu (Part 1 of 2)
Edit
Back
Frequency
1.964 718 182 GHz
Amplitude
-75.0 dBm
Add
Point
Add
Vertical
Delete
Point
Next
Point
Left
Next
Point
Right
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