Spectrum Analyzer Mode
R&S
®
Spectrum Rider FPH
180
User Manual 1321.1011.02 ─ 11
e.g. in a television cable network, the input mixer reduces the R&S Spectrum Rider
inherent spurious products. However, the inherent noise display of the R&S Spec-
trum Rider increases due to the increased attenuation in front of the input mixer.
●
"Auto Low Noise"
If this mode is active, the R&S Spectrum Rider sets the RF attenuation 10 dB
lower. This increases the sensitivity of the R&S Spectrum Rider, which means that
the inherent noise display decreases due to the lower attenuation in front of the
input mixer.
●
"Manual"
Manual selection of the attenuation.
You can check the status of the RF attenuation and the preamplifier in the "Configura-
tion Overview" dialog and in the "Parameter View" area.
Reference Level
Preamplifier OFF
RF attenuation
Preamplifier ON
RF attenuation
Low noise
Low distortion
Low noise
Low distortion
<=-40 dBm
0 dB
0 dB
0 dB
0 dB
-39 dm to -35 dBm
0 dB
0 dB
0 dB
5 dB
-34 dm to -30 dBm
0 dB
0 dB
0 dB
10 dB
-29 dBm to -25 dBm
0 dB
0 dB
0 dB
15 dB
-24 dBm to -20 dBm
0 dB
0 dB
0 dB
20 dB
-19 dBm to -15 dBm
0 dB
5 dB
5 dB
25 dB
-14 dBm to -10 dBm
0 dB
10 dB
10 dB
30 dB
-9 dBm to -5 dBm
5 dB
15 dB
15 dB
35 dB
-4 dBm to 0 dBm
10 dB
20 dB
20 dB
40 dB
1 dBm to 5 dBm
15 dB
25 dB
25 dB
40 dB
6 dBm to 10 dBm
20 dB
30 dB
30 dB
40 dB
11 dBm to 15 dBm
25 dB
35 dB
35 dB
40 dB
16 dBm to 20 dBm
30 dB
40 dB
40 dB
40 dB
21 dBm to 25 dBm
35 dB
40 dB
40 dB
40 dB
26 dBm to 30 dBm
40 dB
40 dB
40 dB
40 dB
1. Press [AMPT] key.
2. Select "Att / Amp / Imp" softkey.
3. Select either the "Auto Low Distortion" or the "Auto Low Noise" menu item.
The R&S Spectrum Rider sets the attenuation according to the table above.
4. Select the "Manual Att" for manual entry of the RF attenuation.
Alternatively, you can select the "ATT" softkey on the "Parameter View" to enter
manually for the RF attenuation.
Configuring Spectrum Measurements
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