R&S FSH
Digital Modulation Analyzer
Measurements on LTE Signals
Operating Manual 1173.6275.12 - 30
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9.8.6 Configuring the Measurement
Some of the results depend on the measurement configuration.
9.8.6.1 Selecting the Channel Bandwidth
The LTE standard specifies the following bandwidths with the appropriate number of
resource blocks.
Channel bandwidth (MHz)
1.4
3
5
10
15
20
Number of resource blocks
6
15
25
50
75
100
► Press the MEAS key.
► Press the "Signal Settings" softkey.
► Select the "Channel Bandwidth" menu item.
The R&S FSH opens a submenu to select the bandwidth.
► Select one of the bandwidths available in the menu.
The R&S FSH sets the bandwidth you have entered and calculates the
corresponding number of resource blocks according to the standard.
9.8.6.2 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).
► Press the MEAS key.
► Press the "Signal Settings" softkey.
► Select either the "Normal", "Extended" or "Auto" menu item.
9.8.6.3 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.
