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Using LTE/LTE-A FDD Analyzer
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Data Channel measurement with LTE/LTE-A FDD Analyzer
Control Channel
The Control Channel measures the constellation for the specified control channel as well as modulation accuracy of the control
channel at the specified subframe.
Setting measure setup
After configuring spectrum measurement in " Configuring Spectrum Measurements ", you can set the measure setup to continue your
measurement. The measurement settings can be saved and recalled as a file by selecting File Type as Setup and load the file onto
the instrument using the
Save/Load icons on the side bar.
1 Tap the Setup ( )icon on the side bar.
2 Tap Bandwidth and select the value from the following choices: 1.4 MHz , 3 MHz , 5MHz , 10 MHz , 15 MHz, or 20 MHz .
3 Tap Subframe Number to set the number of subframe using the on-screen keyboard.
NOTE:
For MBMS testing, this subframe number must be either 0 nor 5 as these subframes 0 and 5 are not available for
MBMS and it must be set to the MBMS transmitted ch
annel’s subframe number.
4 Optional. Tap Physical Cell ID and select the type Manual or Auto .
Auto lets the instrument detect the Physical Cell ID for the LTE signal automatically, and Manual sets a specific Physical Cell
ID for the LTE signal manually in order to speed up the synchronization with a BTS.
5 Optional. Tap CFI and select the type Manual or Auto .
Auto lets the instrument set the number of OFDM symbols used for transmitting PDCCHs in a subframe, and Manual sets the
number of OFDM symbols manually.
NOTE:
The set of OFDM symbols that can be used for PDCCH in a subframe is given by 0 , 2 , 3 or 4 in 1.4 MHz bandwidth
and 1 , 2 or 3 in another bandwidth.
6 Optional. Tap PHICH Ng to set the number of PHICH groups (Ng): 1/6 , 1/2 , 1 , 2 , E-1/6 , E-1/2 , E-1 , or E-2 .
7 Tap EVM Detection Mode and select Single
or Combine
.