LTE FDD

Cell Parameters NPRACH (NB-IoT)

For Waveform Playback (ARB) capability.

This topic describes the settings of the Cell Parameters node for NB-IoT NPRACH.

Narrowband Cell ID

System Bandwidth

Total Number of Occupied Subcarriers

Subcarrier Spacing

Narrowband Cell ID

Range: 0 to 503

Default:

Same as CC index (When Auto Carrier Aggregation Configuration is On)
0 (Otherwise)

Enter a value for the Cell ID. The software sets the values in the Physical Layer Cell ID Group and Physical Layer Cell ID Sector cells based on the Cell ID entry. Cell ID = (3 x Physical Cell ID Group) + Physical Cell ID Sector.

See 3GPP TS 36.211 10.2.6 for more information.

Frequency Offset and Cell ID are always editable, even if Auto Carrier Aggregation Configuration is On. In the case (1) or (2) below, auto configuration is done for Frequency Offset and Cell ID.
(1) When any action "Add CC" or "Delete CC" or "Copy CC" 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.
Auto configuration sets Cell ID same as Component Carrier Index.
If Auto Carrier Aggregation Configuration is set to Off, auto configuration does not work.

SCPI Command	[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:NIOT:PRACh:CIDentity <integer> [:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:NIOT:NPRACh:CIDentity?
SCPI Example
Notes
State Saved	Yes
Preset	1
Min	0
Max	503
Initial S/W Revision	A.19.00

System Bandwidth

System Bandwidth will be 200 kHz and read-only for NB-IoT NPRACH Carrier.

SCPI Command	[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:NIOT:PRACh:BANDwidth B1M4\|B3M\|B5M\|B10M\|B15M\|B20M [:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:NIOT:PRACh:BANDwidth?
SCPI Example
Notes
State Saved	Yes
Preset	B1M4
Initial S/W Revision	A.19.00

Total Number of Occupied Subcarriers

The value in this cell is set by the software based on the System Bandwidth setting. It is set to 48 and read-only for the NB-IoT NPRACH carrier.

SCPI Command	[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:NIOT:PRACh:SCARrier:COUNt?
SCPI Example
Notes
State Saved	Yes
Preset	48
Initial S/W Revision	A.19.00

Subcarrier Spacing

Default: 3.75 kHz

Displays the subcarrier spacing for the NPRACH. It is set to 3.75 kHz and read-only for the NB-IoT NPRACH carrier.

SCPI Command	[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:NIOT:PRACh:SCARrier:SPACing?
SCPI Example	RADio:LTEFdd:WAVeform:CCARrier:NIOT:PRACh:SCARrier:SPACing?
Notes
State Saved	Yes
Preset	F3K75
Initial S/W Revision	A.19.00