LTE FDD

CRS (Basic Downlink)

For Waveform Playback (ARB) capability.

This topic describes the settings of the CRS node when the carrier is Basic Downlink.

Cell Specific Reference Signal Power

Sets a power level, in dB for the cell specific reference signal.

SCPI Command	[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:CRS:POWer <real> [:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:CRS:POWer?
SCPI Example	RADio:LTEFdd:WAVeform:CCARrier:DLINk:CRS:POWer 0 RADio:LTEFdd:WAVeform:CCARrier:DLINk:CRS:POWer?
Dependencies
Preset	0
State Saved	Yes
Min	-60
Max	20
Initial S/W Revision	A.20.01

When this setting is set to Manual, it enables you to set Number of CRS Antenna Ports and CRS Antenna Port settings.
When this setting is set to Auto, Number of CRS Antenna Ports and CRS Antenna Port settings are automatically set by software based on Total Number of Antennas.

SCPI Command	[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:CRS:ANTenna:CONFig AUTO\|MANual [:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:CRS:ANTenna:CONFig?
SCPI Example	RADio:LTEFdd:WAVeform:CCARrier:DLINk:CRS:ANTenna:CONFig AUTO RADio:LTEFdd:WAVeform:CCARrier:DLINk:CRS:ANTenna:CONFig?
Preset	AUTO
State Saved	Yes
Initial S/W Revision	A.20.01

Sets number of antenna ports for cell-specific reference signals. This should always be equal to or less than Total Number of Antennas.

Reference: 3GPP TS 36.211

SCPI Command	[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:CRS:ANTenna:COUNt?
SCPI Example	RADio:LTEFdd:WAVeform:CCARrier:DLINk:CRS:ANTenna:COUNt?
Notes	In case CRS Antenna Configuration is Auto, parameters are automatically set by software and are read-only. In case CRS Antenna Configuration is Manual, you can change parameters manually. In case CRS Antenna Configuration is Auto and Total number of Antennas is up to 4, then Number of CRS Antenna Ports is set same as the Total number of Antennas. In case CRS Antenna Configuration is Auto and Total number of Antennas is 8, then Number of CRS Antenna Ports is set as 4. Total number of Antennas and Number of CRS Antenna Ports are different parameters and are available to set separately.
Dependencies	If CRS Antenna Configuration is set to Auto, then Number of CRS Antenna Ports is set equal to or less than Total Number of Antennas (for example, if Total Number of Antennas=4 then Number of CRS Antenna Ports=4 or if Total Number of Antennas=8 then Number of CRS Antenna Ports=4).
Preset	1
State Saved	Yes
Min	N/A
Max	N/A
Initial S/W Revision	A.20.01

Selects virtual antenna port for CRS transmission. Available selections depend on Number of CRS Antenna Ports.

Ref: 3GPP TS 36.211.

SCPI Command	[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:CRS:ANTenna:PORT?
SCPI Example	RADio:LTEFdd:WAVeform:CCARrier:DLINk:CRS:ANTenna:PORT?
Notes	Available choices for the setting are as follows. If Number of CRS Antenna Ports = 1 then CRS Antenna Port = Port 0. If Number of CRS Antenna Ports = 2 then CRS Antenna Port = Port 0, 1. If Number of CRS Antenna Ports = 4 then CRS Antenna Port = Port 0, 1, 2, 3. In case CRS Antenna Configuration is Auto, the parameter is automatically set by software and is set read-only. In case CRS Antenna Configuration is Manual, you can change the parameter manually. In case CRS Antenna Configuration is Auto, CRS Antenna Port is set same as (Antenna Port) mod (Number of CRS Antenna Ports).
Dependencies	If CRS Antenna Configuration = Auto then CRS Antenna Port = (Antenna Port) mod (Number of CRS Antenna Ports).
Preset	Port 0
State Saved	Yes
Initial S/W Revision	A.20.01

Selects the PDSCH cell-specific ratio.

SCPI Command	[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:CRS:PDSCh:RATio BA1\|PB0\|PB1\|PB2\|PB3 [:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:CRS:PDSCh:RATio?
SCPI Example	RADio:LTEFdd:WAVeform:CCARrier:DLINk:CRS:PDSCh:RATio BA1 RADio:LTEFdd:WAVeform:CCARrier:DLINk:CRS:PDSCh:RATio?
Dependencies
Preset	BA1
State Saved	Yes
Initial S/W Revision	A.20.01