Anritsu Spectrum Master MS2720T, User Manual

Page: 465 / 1035

3-19 Limit Menu Interference Analyzer (Option 25)
3-86 PN: 10580-00349 Rev. H Spectrum Analyzer MG
Limit Move Menu
Key Sequence:
Shift > Limit
(
6
) key
> Limit Move
Move Limit to Current Center Freq: Pressing this submenu key moves the
center of the existing limit line to the center frequency of the measurement.
The span of the existing limit line is not changed by doing this. Use this
submenu key as an easy way to get an existing limit line on screen. If no limit
line is turned on, then a new, flat default limit line is turned on and is located
2.5 grid lines from the top of the screen for the upper limit line or 2.5 grid lines
from the bottom of the screen for the lower limit line.
Move Limit ## dB: If the limit line is flat, then use this submenu key to move
the limit line to an absolute power point in dBm. If the limit line is not flat, then
use this submenu key to move the limit line up or down by the selected
number of dB. Use the keyboard to enter the desired value. The entire line
moves by the amount that is entered. The limit line can also be moved by
using the rotary knob. Turn the rotary knob clockwise to move the line to
higher power levels. The up and down arrows move the limit line by 5% of the
screen height. The left and right arrows move the limit line by 0.2% of the
screen height or 0.2 dB when the scale is set to 10 dB/division.
Move Limit ## Hz: Pressing this submenu key allows you to adjust the
frequencies of the limit line. All inflection points are moved by the value
entered. The rotary knob can also be used to make this adjustment. Turn the
rotary knob clockwise to move the limit line to higher frequencies. The left or
right arrows move the limit line by 5% of the span while the up or down arrows
move the line by one display pixel.
Move Limit to Marker 1: Press this submenu key to move the frequency
and amplitude of the center frequency of the limit line to the frequency and
amplitude of Marker 1 (assuming that the Offset from Marker 1 submenu key
is set to 0 dB).
Offset from Marker 1 ## dB: Press this submenu key to set a limit line
offset value from Marker 1 amplitude. This feature moves the limit line
amplitude and frequency as needed to place the center of the limit line the
user-specified number of dB from the position of Marker 1. Positive values
place the limit line above Marker 1, and negative values place the limit line
below Marker 1.
Back: Press this submenu key to return to the “Limit Menu” on page 3-83 .
Figure 3-80. IA Limit Move Menu
Back
Limit Move
Move Limit
to Current
Center Freq
Move Limit
U/D
0.0 dB
Move Limit
L/R
0 Hz
Move Limit
to Marker 1
Offset from Marker 1
10.0 dB
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