The Spectrum Application
R&S
®
FPC
98User Manual 1178.4130.02 ─ 07
After activating the channel table, the R&S FPC is configured according to the
information contained in the channel table. Instead of a center frequency, the
R&S FPC shows the currently active channel number including the name of the
channel. The center frequency of a channel is defined in the channel table and is
the frequency corresponding to the selected channel.
Selecting a channel instead of a center frequency
When you have selected frequency input in terms of channels, entering a center fre-
quency, start or stop frequency is not possible anymore.
Instead you select a channel. The R&S FPC then adjusts the center, start and stop fre-
quency according to the channel table.
1. Press the "Freq" key to open the frequency menu.
2. Select the "Center Frequency" menu item.
The R&S FPC opens an input field to select a specific channel.
3. Enter the channel you would like to analyze.
The R&S FPC changes the frequency according to the channel table and the chan-
nel you have selected.
Channel numbers are assigned to frequencies as follows.
• The first channel is assigned a channel number and a frequency.
• All subsequent channels have ascending numbers.
• The frequency spacing between channels is fixed. It can also be negative. In that
case, the center frequency of the R&S FPC decreases with ascending channel
numbers.
• In transmission systems containing gaps in the frequency range (as in the case of
television, for example), a channel table can comprise multiple ranges.
14.4 Amplitude Configuration
Access: "Ampt"
Access: "Setup" > "Config Overview" > "Amplitude" (selected settings)
In addition to measuring the frequency of a signal, the other main function of a spec-
trum analyzer is to measure level characteristics of the signal.
The R&S FPC provides several settings that have an effect on the way the level is
measured and how level values are displayed.
Remote commands to configure the amplitude:
●
Chapter 19.12.3, "Amplitude", on page 252
Selecting the input impedance
The RF input has an impedance of 50 Ω.
Amplitude Configuration
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