R&S FSH
Digital Modulation Analyzer
Measurements on LTE Signals
Operating Manual 1309.6275.12 - 14
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7.5.4.2 Selecting the Cyclic Prefix
The cyclic prefix serves as a guard interval between OFDM symbols to avoid
interferences. The cyclic prefix is either "Normal" (slot contains 7 OFDM symbols),
"Extended" (slot contains 6 OFDM symbols) or "Auto" (the application automatically
detects the type of cyclic prefix).
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Press the MEAS key.
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Press the "Signal Settings" softkey.
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Select either the "Normal", "Extended" or "Auto" menu item.
7.5.4.3 Selecting the Cell Identity
The cell ID, cell identity group and physical layer identity are interdependent
parameters. In combination they are responsible for synchronization between network
and user equipment.
The LTE standard defines 504 unique physical-layer cell identities. These are split in
168 cell identity groups with 3 unique identities per group.
In the default state, the R&S FSH automatically detects the cell identity, its group and
ID. If you need results for a specific identity, you can also select it manually.
Setting the cell ID
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Press the MEAS key.
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Press the "Signal Settings" softkey.
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Select the "Cell Identity" menu item.
The R&S FSH opens an input field to define the cell identity.
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Enter a number between 0 and 503 to set the cell identity.
Setting the cell group and the cell ID
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Press the MEAS key.
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Press the "Signal Settings" softkey.
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First, select the "Group" menu item.
The R&S FSH opens an input field to select a cell group.
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Enter a number between 0 and 167 to select a cell identity group.
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Press the "Signal Settings" softkey.
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Select the "ID…" menu item.
The R&S FSH opens an input field to select an ID.
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Enter a number between 0 and 2 to select an ID.
The R&S FSH now shows the results to that cell identity.
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You can always return to automatic detection by selecting the "Auto" menu item.
