Rohde & Schwarz 1321.1211.02, User Manual

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Spectrum Analyzer Mode
R&S
®
Cable Rider ZPH
219 User Manual 1321.0950.02 ─ 07
Reference Level Preamplifier OFF
RF Attenuation
Preamplifier ON
RF Attenuation
-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 the [SCALE/AMPT] key.
2. Select the "Att / Amp / Imp" softkey.
3. Select either the "Auto Low Distortion" or the "Auto Low Noise" menu item.
The R&S Cable Rider ZPH 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.
The R&S Cable Rider ZPH opens an entry box 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 Cable Rider ZPH puts a blue dot at the
"ATT" displays on the "Parameter View".
8.2.3.6 Using the Preamplifier
To increase the input sensitivity, the R&S ZPH-B22 provides an integrated 20 dB pre-
amplifier after the input mixer.
In the default state of the R&S Cable Rider ZPH, the preamplifier is turned off. If you
want to measure signals with low powers, you can turn it on.
1. Press the [SCALE/AMPT] key.
2. Select the "Att / Amp / Imp" softkey.
3. Enable or disable the checkbox to turn on or off the "Preamp" menu item.
The R&S Cable Rider ZPH turns the preamplifier on and off.
8.2.3.7 Setting the Input Impedance
In the default state, the input impedance is 50
Ω
.
Configuring Spectrum Measurements