The Spectrum Application (RF Measurements)
R&S
®
FPL1000
475
User Manual 1178.3370.02 ─ 03
Tracking absolute time - timestamps
Alternatively to the frame count, the absolute time (that is: a
timestamp
) at which a
frame was captured can be displayed. While the measurement is running, the time-
stamp shows the system time. In single sweep mode or if the sweep is stopped, the
timestamp shows the time and date at the end of the sweep.Thus, the individual
frames can be identified by their timestamp or their frame count.
When active, the timestamp replaces the display of the frame number in the diagram
footer (see
Displaying individual frames
The spectrogram diagram contains all stored frames since it was last cleared. Arrows
on the left and right border of the spectrogram indicate the currently selected frame.
The spectrum diagram always displays the spectrum for the currently selected frame.
The current frame number is indicated in the diagram footer, or alternatively a time-
stamp, if activated. The current frame, displayed at the top of the diagram, is frame
number 0. Older frames further down in the diagram are indicated by a negative index,
e.g. "-10" . You can display the spectrum diagram of a previous frame by changing the
current frame number.
Color Maps
Spectrograms assign power levels to different colors to visualize them. The legend
above the spectrogram display describes the power levels the colors represent.
The color display is highly configurable to adapt the spectrograms to your needs. You
can define:
●
Which colors to use (Color scheme)
●
Which value range to apply the color scheme to
●
How the colors are distributed within the value range, i.e where the focus of the vis-
ualization lies (shape of the color curve)
The individual colors are assigned to the power levels automatically by the
R&S
FPL1000.
The Color Scheme
●
Hot
Uses a color range from blue to red. Blue colors indicate low levels, red colors indi-
cate high ones.
●
Cold
Uses a color range from red to blue. Red colors indicate low levels, blue colors
indicate high ones.
The "Cold" color scheme is the inverse "Hot" color scheme.
●
Radar
Trace Configuration
