LTE TDD
For Waveform Playback (ARB) capability.
This topic describes the carrier-level LTE TDD parameters that apply to both downlink and uplink, including cell identity, system bandwidth, and cyclic prefix.
Total Number of Resource Blocks
Total Number of Occupied Sub-carriers
Number of Subcarriers for Resource Block
Number of Symbols for Resource Block
Sets the physical layer cell ID group (NID1, 0-167). Combined with Physical Layer Cell ID Sector to uniquely determine the Cell ID. See 3GPP TS 36.211.
|
SCPI Command |
[:SOURce]:RADio:LTETdd:WAVeform[:ARB]:CCARrier<channel>:CIDentity:GRP <integer> [SOURce]:RADio:LTETdd:WAVeform[:ARB]:CCARrier<channel>:CIDentity:GRP? |
|
SCPI Example |
RADio:LTETdd:WAVeform:CCARrier:CIDentity:GRP 0 RADio:LTETdd:WAVeform:CCARrier:CIDentity:GRP? |
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Notes |
Cell ID = Physical Layer Cell ID Group x 3 + Physical Layer Cell ID Sector. |
|
Dependencies |
Drives Cell ID together with Physical Layer Cell ID Sector. |
|
Preset |
0 |
|
State Saved |
Yes |
|
Min |
0 |
|
Max |
167 |
|
Initial S/W Revision |
A.20.01 |
Sets the physical layer cell ID sector (NID2, 0-2). Combined with Physical Layer Cell ID Group to uniquely determine the Cell ID. Cell ID = Group x 3 + Sector. See 3GPP TS 36.211.
|
SCPI Command |
[:SOURce]:RADio:LTETdd:WAVeform[:ARB]:CCARrier<channel>:CIDentity:SECT <integer> [SOURce]:RADio:LTETdd:WAVeform[:ARB]:CCARrier<channel>:CIDentity:SECT? |
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SCPI Example |
RADio:LTETdd:WAVeform:CCARrier:CIDentity:SECT 1 RADio:LTETdd:WAVeform:CCARrier:CIDentity:SECT? |
|
Notes |
Cell ID = Physical Layer Cell ID Group x 3 + Physical Layer Cell ID Sector. |
|
Dependencies |
Drives Cell ID together with Physical Layer Cell ID Group. |
|
Preset |
For Component Carrier1: 1 For Component Carrier2: 2 |
|
State Saved |
Yes |
|
Min |
0 |
|
Max |
2 |
|
Initial S/W Revision |
A.20.01 |
Query only
Displays the computed physical layer cell identity (0-503). Cell ID = Physical Layer Cell ID Group x 3 + Physical Layer Cell ID Sector. See 3GPP TS 36.211.
|
SCPI Command |
[:SOURce]:RADio:LTETdd:WAVeform[:ARB]:CCARrier<channel>:CIDentity? |
|
SCPI Example |
RADio:LTETdd:WAVeform:CCARrier:CIDentity? |
|
Notes |
Read-only. Derived from Physical Layer Cell ID Group x 3 + Physical Layer Cell ID Sector. |
|
Couplings |
Derived from Physical Layer Cell ID Group and Physical Layer Cell ID Sector. |
|
Preset |
|
|
State Saved |
Yes |
|
Min |
0 |
|
Max |
503 |
|
Initial S/W Revision |
A.20.01 |
Sets the LTE system bandwidth. When selected, Total Number of Resource Blocks and Total Number of Occupied Sub-carriers are automatically adjusted.
|
SCPI Command |
[:SOURce]:RADio:LTETdd:WAVeform[:ARB]:CCARrier<channel>:BANDwidth B1M4|B3M|B5M|B10M|B15M|B20M [SOURce]:RADio:LTETdd:WAVeform[:ARB]:CCARrier<channel>:BANDwidth? |
|
SCPI Example |
RADio:LTETdd:WAVeform:CCARrier:BANDwidth B10M RADio:LTETdd:WAVeform:CCARrier:BANDwidth? |
|
Couplings |
Controls Total Number of Resource Blocks and Total Number of Occupied Sub-carriers. |
|
Preset |
B10M (10 MHz, 50 RB) |
|
State Saved |
Yes |
|
Initial S/W Revision |
A.20.01 |
Query only
Displays the total number of resource blocks for the selected system bandwidth. Set automatically by the System Bandwidth setting.
|
SCPI Command |
[:SOURce]:RADio:LTETdd:WAVeform[:ARB]:CCARrier<channel>:RB:COUNt? |
|
SCPI Example |
RADio:LTETdd:WAVeform:CCARrier:RB:COUNt? |
|
Notes |
Read-only. Determined by System Bandwidth. |
|
Couplings |
Derived from System Bandwidth. |
|
Preset |
50 |
|
State Saved |
Yes |
|
Initial S/W Revision |
A.20.01 |
Query only
Displays the total number of occupied sub-carriers for the selected system bandwidth. The center subcarrier is not used for transmission; transmitted sub-carriers = occupied - 1.
|
SCPI Command |
[:SOURce]:RADio:LTETdd:WAVeform[:ARB]:CCARrier<channel>:SCARrier:COUNt? |
|
SCPI Example |
RADio:LTETdd:WAVeform:CCARrier:SCARrier:COUNt? |
|
Notes |
Read-only. Center subcarrier (DC) is not transmitted. |
|
Couplings |
Derived from System Bandwidth. |
|
Preset |
600 |
|
State Saved |
Yes |
|
Initial S/W Revision |
A.20.01 |
Query only
Displays the subcarrier spacing. Read-only and fixed at 15 kHz for LTE TDD.
|
SCPI Command |
[:SOURce]:RADio:LTETdd:WAVeform[:ARB]:CCARrier<channel>:SCARrier:SPACing? |
|
SCPI Example |
RADio:LTETdd:WAVeform:CCARrier:SCARrier:SPACing? |
|
Preset |
15 kHz |
|
State Saved |
Yes |
|
Initial S/W Revision |
A.20.01 |
Sets the cyclic prefix type. The software automatically adjusts Number of Symbols for Resource Block based on the selection.
|
SCPI Command |
[:SOURce]:RADio:LTETdd:WAVeform[:ARB]:CCARrier<channel>:CP NORMal|EXTended [SOURce]:RADio:LTETdd:WAVeform[:ARB]:CCARrier<channel>:CP? |
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SCPI Example |
RADio:LTETdd:WAVeform:CCARrier:CP NORMal RADio:LTETdd:WAVeform:CCARrier:CP? |
|
Notes |
Read-only on secondary cells when Auto CA Configuration is On. |
|
Dependencies |
Drives Number of Symbols for Resource Block. Read-only on secondary cells when Auto CA Configuration is On. |
|
Preset |
NORMal |
|
State Saved |
Yes |
|
Initial S/W Revision |
A.20.01 |
Query only
Displays the number of subcarriers per resource block. Fixed at 12 for LTE.
|
SCPI Command |
[:SOURce]:RADio:LTETdd:WAVeform[:ARB]:CCARrier<channel>:RB:SCARrier:COUNt? |
|
SCPI Example |
RADio:LTETdd:WAVeform:CCARrier:RB:SCARrier:COUNt? |
|
Preset |
12 |
|
State Saved |
Yes |
|
Initial S/W Revision |
A.20.01 |
Displays the number of OFDM symbols per resource block slot.
|
SCPI Command |
[:SOURce]:RADio:LTETdd:WAVeform[:ARB]:CCARrier<channel>:RB:SYMBol:COUNt? |
|
SCPI Example |
RADio:LTETdd:WAVeform:CCARrier:RB:SYMBol:COUNt? |
|
Notes |
Read-only. 7 for Normal CP, 6 for Extended CP. |
|
Couplings |
Derived from Cyclic Prefix. |
|
Preset |
7 |
|
State Saved |
Yes |
|
Initial S/W Revision |
A.20.01 |