Using the Markers
R&S FSH
1145.5973.12 4.30
E-11
Deactivating all markers or delta markers:
Press the MARKER or DELTA softkey.
Using the rotary knob or the cursor keys, select
ALL MARKERS OFF or DELTA OFF.
Press the ENTER key or the MARKER or DELTA
softkey to deactivate all markers or delta markers.
Note:
When the markers are deactivated, the R&S FSH also deactivates all delta markers,
because they use marker 1 as a reference.
Exiting the multimarker mode:
Press the MARKER key.
Press the MARKER MODE softkey.
Using the cursor keys or the rotary knob, select
NORMAL, NOISE or FREQ COUNT from the
submenu.
Confirm your selection with the ENTER key or the
MARKER MODE softkey.
The R&S FSH returns to the normal marker mode.
The R&S FSH transfers the settings of the multimarker and multi delta marker with the lowest numbers
to the normal marker mode.
Alternatively, you can exit the multimarker mode by deactivating all markers (MARKER key: MARKER
softkey: ALL MARKERS OFF menu item) or with PRESET.
Marker functions
Apart from displaying the level and frequency at the marker position (NORMAL setting), the R&S FSH
can also perform other forms of analysis at the marker position. For example, the R&S FSH can
calculate the noise power density referred to 1 Hz bandwidth (NOISE function) or measure the
frequency of a signal at the marker position (FREQ COUNT function).
Measuring the noise power density
The NOISE function is used to calculate the noise power density at the marker position. The R&S FSH
calculates the noise power density in dBm/(1 Hz) from the trace pixel values, the selected resolution
bandwidth, the detector and the level display mode (absolute or relative). To stabilize the noise power
display, the R&S FSH uses the pixel on which the marker is positioned and the four pixels to the right
and the four pixels to the left of the marker pixel. Noise power density can provide useful information
