Common Analysis and Display Functions
R&S
®
ESW
207
User Manual 1177.6298.02 ─ 08
Frames are sorted in chronological order, beginning with the most recently recorded
frame at the top of the diagram (frame number 0). With the next measurement, the pre-
vious frame is moved further down in the diagram, until the maximum number of cap-
tured frames is reached. The display is updated continuously during the measurement,
and the measured trace data is stored. Spectrogram displays are continued even after
single measurements unless they are cleared manually.
The maximum number of frames that you can capture depends on the number of mea-
surement points that are analyzed during the measurement.
The scaling of the time axis (y-axis) is not configurable. However, you can enlarge the
spectrogram display by maximizing the window using the "Split/Maximize" key.
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 measurement mode or if the measurement is
stopped, the timestamp shows the time and date at the end of the measurement.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 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.
Markers in the Spectrogram
Markers and delta markers are shaped like diamonds in the spectrogram. They are
only displayed in the spectrogram if the marker position is inside the visible area of the
spectrogram. If more than two markers are active, the marker values are displayed in a
separate marker table.
In the spectrum result display, the markers and their frequency and level values (1) are
displayed as usual. Additionally, the frame number is displayed to indicate the position
of the marker in time (2).
In the spectrogram result display, you can activate up to 16 markers or delta markers
at the same time. Each marker can be assigned to a different frame. Therefore, in
addition to the frequency you also define the frame number when activating a new
Trace Configuration
