LTE FDD
For Waveform Playback (ARB) capability.
This topic describes the settings of the Cell Parameters node.
Total Number of Resource Blocks
Total Number of Occupied Subcarriers
Number of Subcarriers for Resource Block
This setting specifies the system bandwidth. GUI labels also indicate the number of Resource Blocks (RB).
When the system bandwidth is changed, the software automatically adjusts the value in the Total number of Resource Blocks cell, the Total number of Occupied Sub-carriers cell and so on.
Note: The resource blocks and some parameters are reconfigured by changing the System Bandwidth parameter.
In the case (1) or (2), auto configuration is done for Frequency Offset.
(1) When any action "Add Carrier" or "Delete Carrier" or Change System BW is done and Auto Carrier Aggregation Configuration parameter is On.
(2) When Auto Carrier Aggregation Configuration parameter is changed to On from Off.
If Auto Carrier Aggregation Configuration is set to off, auto configuration does not work.
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SCPI Command |
[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<carrier>:PRACh:BANDwidth|BWIDth B1M4|B3M|B5M|B10M|B15M|B20M [:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<carrier>:PRACh:BANDwidth|BWIDth? |
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SCPI Example |
:RAD:LTEF:WAV:CCAR:PRAC:BAND F10M :RAD:LTEF:WAV:CCAR:PRAC:BAND? |
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Notes |
BWIDth SCPI node is an alias of BANDwidth. |
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State Saved |
Yes |
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Preset |
B10M |
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Range |
1.4 MHz (6RB) | 3 MHz (15RB) | 5 MHz (25RB) | 10 MHz (50RB) | 15 MHz (75RB) | 20 MHz (100RB) |
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Initial S/W Revision |
A.14.00 |
This setting indicates the total number of resource blocks for the uplink.
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SCPI Command |
[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<carrier>:PRACh:RB:COUNt? |
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SCPI Example |
:RAD:LTEF:WAV:CCAR:PRAC:RB:COUN? |
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Notes |
Query only |
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Dependencies |
System Bandwidth |
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State Saved |
No |
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Preset |
6 for 1.4 MHz System Bandwidth 15 for 3 MHz System Bandwidth, 25 for 5 MHz System Bandwidth, 50 for 10 MHz System Bandwidth, 75 for 15 MHz System Bandwidth, 100 for 20 MHz System Bandwidth |
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Initial S/W Revision |
A.14.00 |
This setting indicates the total number of occupied subcarriers for the uplink.
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SCPI Command |
[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<carrier>:PRACh:SCARrier:COUNt? |
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SCPI Example |
:RAD:LTEF:WAV:CCAR:PRAC:SCAR:COUN? |
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Notes |
Query only |
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Dependencies |
System Bandwidth |
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State Saved |
No |
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Preset |
864 for 1.4 MHz System Bandwidth, 2160 for 3 MHz System Bandwidth, 3600 for 5 MHz System Bandwidth, 7200 for 10 MHz System Bandwidth, 10800 for 15 MHz System Bandwidth, 14400 for 20 MHz System Bandwidth |
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Initial S/W Revision |
A.14.00 |
Displays the subcarrier spacing for the PRACH carrier.
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SCPI Command |
[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<carrier>:PRACh:SCARrier:SPACing? |
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SCPI Example |
:RAD:LTEF:WAV:CCAR:PRAC:SCAR:SPAC? |
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Notes |
Query only Value is fixed to 1.25 kHz |
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State Saved |
No |
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Preset |
F1K25 |
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Range |
Value SCPI 1.25 kHz F1K25 |
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Initial S/W Revision |
A.14.00 |
Displays the number of consecutive subcarriers in an uplink resource block.
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SCPI Command |
[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<carrier>:PRACh:RB:SCARrier:COUNt? |
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SCPI Example |
:RAD:LTEF:WAV:CCAR:PRAC:RB:SCAR:COUN? |
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Notes |
Query only Value is fixed to 144 |
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State Saved |
No |
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Preset |
144 |
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Initial S/W Revision |
A.14.00 |
This setting specifies the state of PRACH DFT Swap.
PRACH DFT Swap influences how data is mapped to resource elements in the physical uplink shared channel after discrete Fourier transform is performed. PRACH DFT Swap can be turned on or off to provide two different interpretations of how data should be mapped to resource elements in PRACH channels.
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SCPI Command |
[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<carrier>:PRACh:DFTSwap[:STATe] OFF|ON|0|1 [:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<carrier>:PRACh:DFTSwap[:STATe]? |
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SCPI Example |
:RAD:LTEF:WAV:CCAR:PRAC:DFTS ON :RAD:LTEF:WAV:CCAR:PRAC:DFTS? |
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State Saved |
Yes |
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Preset |
OFF |
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Initial S/W Revision |
A.14.00 |