R&S FSH
Spectrum Analyzer Mode
Working with Channel Tables
Operating Manual 1173.6275.12 - 30
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3.3 Working with Channel Tables
Almost all transmission systems divide their assigned frequency ranges into channels.
Each channel corresponds to a specific frequency. To keep the handling of such
systems simple, you can use channel tables instead of entering frequencies manually.
The R&S FSH already comes with an assortment of channel tables that you can use
without doing anything. If you want to test transmission standards that are not listed,
you can also build channel tables manually with the "Channel Table Editor" of the
R&S FSH4View software package that is delivered with the R&S FSH. To use one of
those, you just have to copy the channel table to the R&S FSH.
For more information see "
Selecting a channel table
► Press the FREQ key.
► Press the "Frequency Mode" softkey.
► Select the "Channel" menu item.
The R&S FSH opens a dialog box to select a channel table.
► Select one of the available channel tables.
After activating the channel table, the R&S FSH is set up according to the
information contained in the channel table. Instead of a center frequency, the
R&S FSH 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
Entering a center, start or stop frequency is not possible anymore. Instead you select a
channel. The R&S FSH then adjusts the center, start and stop frequency according to
the channel table.
► Press the FREQ key.
► Press the "Center Frequency" softkey.
The R&S FSH opens an input field to select the channel.
► Enter the channel you want to perform measurements on.
The R&S FSH changes the channel according to the channel table.
Channel numbers are assigned to frequencies as follows:
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The first channel is assigned a channel number and a frequency.
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All subsequent channels have ascending numbers.
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The frequency spacing between channels is fixed. It can also be negative, i.e.
the center frequency of the R&S FSH decreases with ascending channel
number.
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In transmission systems containing gaps in the frequency range (as in the case
of television, for example), a channel table can comprise multiple ranges.
