Rohde & Schwarz ZVH4 - Page 144

R&S ZVH Spectrum Analyzer Mode (R&S ZVH-K1)
Configuring Spectrum Measurements
Operating Manual 1309.6946.12 - 09 129
Reference Level
Preamplifier OFF
Preamplifier ON
RF Attenuation
RF Attenuation
Low Noise
Low Distortion
Low Noise
Low Distortion
≤-30 dBm
0 dB
0 dB
0 dB
0 dB
-29 to -25 dBm
0 dB
0 dB
0 dB
5 dB
-24 to -20 dBm
0 dB
0 dB
0 dB
10 dB
-19 to -15 dBm
0 dB
5 dB
5 dB
15 dB
-14 to -10 dBm
0 dB
10 dB
10 dB
20 dB
-9 to -5 dBm
5 dB
15 dB
15 dB
25 dB
-4 to 0 dBm
10 dB
20 dB
20 dB
30 dB
1 to 5 dBm
15 dB
25 dB
25 dB
35 dB
6 to 10 dBm
20 dB
30 dB
30 dB
40 dB
11 to 15 dBm
25 dB
35 dB
35 dB
40 dB
16 to 20 dBm
30 dB
40 dB
40 dB
40 dB
21 to 25 dBm
35 dB
40 dB
40 dB
40 dB
26 to 30 dBm
40 dB
40 dB
40 dB
40 dB
► Press the SCALE/AMPT key.
► Press the "RF Att / Amp / Imp" softkey.
► Select either the "Auto Low Distortion" or the "Auto Low Noise" menu item.
The R&S ZVH sets the attenuation according to the table above.
► Select the "Manual: 0 dB" menu item for manual selection of the RF attenuation.
The R&S ZVH opens an input field to set the RF attenuation. You can set the
attenuation from 0 dB to 40 dB in 5 dB steps.
To indicate a manual attenuation, the R&S ZVH puts a red dot at the "Att:"
hardware setting ( ).
4.2.2.6 Using the Preamplifier
To increase the input sensitivity, the R&S ZVH provides an integrated 20 dB
preamplifier after the input mixer.
In the default state of the R&S ZVH, the preamplifer is turned off. If you want to
measure signals with low powers, you can turn it on.
► Press the SCALE/AMPT key.
► Press the "RF Att / Amp / Imp" softkey.
► Select either the "Preamp On" or "Preamp Off" menu item.
The R&S ZVH turns the preamplifier on and off.