3 Spectrum Analyzer Mode
3.2 Swept SA Measurement
Select Display Line
Lets you select the display line currently being controlled by "Display Line" on page
270.
Preset 1
Display Line
Activates an adjustable horizontal line that is used as a visual reference line. The
line’s vertical position corresponds to its amplitude value. The value of the display
line (for example, –20.3dBm) appears right-justified above the line itself on the right
side of the display, marked DL for measurements that support only one Display Line.
For measurements that support more than one; DL1 for Display Line1, “DL2” for
Display Line2, etc.
In measurements that support multiple Display Lines, this control affects whichever
Display Line has been selected by "Select Display Line" on page 270.
The Display Line can be adjusted using the step keys, knob, or numeric keypad. It
can also be dragged on the display with your finger or a mouse. The unit of Display
Line is determined by "Y Axis Unit" on page 1853 under Amplitude. If more than one
window has a display line, the display line of the selected window is controlled.
If the Display Line is off the screen, it shows as a line at the top/bottom of the screen
with an arrow pointing up or down. As with all such lines (Pk Thresh, Trigger Level,
etc.) it is drawn on top of all traces.
Unaffected by "Auto Couple" on page 2017.
Remote
Command
:DISPlay:WINDow[1]:TRACe:Y:DLINe[1]|
2|…|4
<ampl>
:DISPlay:WINDow[1]:TRACe:Y:DLINe[1]|2|…|4?
Example Turn on Display Line; or if multiple display lines, turns on Display Line 1:
:DISP:WIND:TRAC:Y:DLIN:STAT ON
Adjust Display Line 2:
:DISP:WIND:TRAC:Y:DLIN2 -32dBm
Couplings When a value is set for the display line, it is turned ON
When Display Line switches from OFF to ON, if it is off-screen, it is set to either the top or bottom of
screen, depending on which direction off-screen it was
The Display Line's value does not change when it is turned OFF
Preset Display Line 1 selected, OFF, and set to -25dBm
State Saved Saved in instrument state
Min/Max –/+∞ (minus/plus infinity) in current units
Auto Function
270 Spectrum Analyzer Mode User's &Programmer's Reference
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