R&S FSH
Spectrum Analyzer Mode
Performing Spectrum Measurements
Operating Manual 1309.6275.12 - 14
75
M
Press the MARKER key.
The R&S FSH activates a marker
and sets it on the peak level of the
currently displayed spectrum.
M
Use the rotary knob or the cursor
keys to move the marker on the
horizontal axis to the frequency
you want to analyze, or enter the
frequency directly with the number
keys.
M
Press the "Select Time Line" softkey and browse through the spectrums using the
rotary knob or the cursor keys until the spectrum of interest is displayed in the
upper window.
The time stamp of the selected time line gives you a precise indication on when the
event shown in the spectrum occurred.
For more information on marker functionality, see
C
"
Switching back to active spectrogram recording
To resume recording of a new spectrogram
M
Press the "Live Update" softkey at any time you are in playback mode.
The R&S FSH switches back to performing live measurements.
2.1.9 Using Isotropic Antennas
If you need to determine the field strength, you can connect an isotropic antenna
(R&S TS-EMF, order no. 1158.9295.13) to the R&S FSH. The antenna works in the
frequency range from 30 MHz to 3 GHz.
The antenna has three orthogonal elements for measuring the field strength. The
R&S FSH triggers the three antenna elements one after the other via the probe power
socket and calculates the resultant field strength
E
r
(r = resultant field strength) from
the results of the three individual measurements:
2
2
2
z
y
x
r
E
E
E
E
+
+
=
The transducer factors for each antenna element and the cable loss of the antenna
cable are compensated in the measurement. If you use an extension cable like
R&S TS-EMFZ2 (order no. 1166.5708.02), you can take the additional cable loss into
account by using transducer factors. The transducer factors are specific to the antenna
and are supplied together with the TS-EMF antenna.
