LTE FDD

PRS (Downlink E-UTRA)

For Waveform Playback (ARB) capability.

This topic describes the settings of the PRS node when the carrier is Downlink E-UTRA.

State

Power

Antenna Mapping for Port

Number of PDCCH Symbols

PRS Bandwidth

Number of Consecutive DL Subframes (N_PRS)

PRS Configuration Index (I_PRS)

PRS Periodicity (T_PRS)

PRS Subframe Offset (Delta_PRS)

PRS Muting Sequence Length

PRS Muting Sequence

State

Turns the positioning reference signal on or off.

SCPI Command	[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:PRS:STATe ON\|OFF\|1\|0 [:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:PRS:STATe?
SCPI Example	RADio:LTEFdd:WAVeform:CCARrier:DLINk:PRS:STATe OFF RADio:LTEFdd:WAVeform:CCARrier:DLINk:PRS:STATe?
Choices	ON \| OFF
Preset	0
State Saved	Yes
Initial S/W Revision	A.20.01

Power

Sets the power level, in dB for the positioning reference signal.

SCPI Command	[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:PRS:POWer <rel_ampl> [:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:PRS:POWer?
SCPI Example	RADio:LTEFdd:WAVeform:CCARrier:DLINk:PRS:POWer 0.0 RADio:LTEFdd:WAVeform:CCARrier:DLINk:PRS:POWer?
Range	-60 to 20 dB
Preset	0
State Saved	Yes
Min	-60
Max	20
Initial S/W Revision	A.20.01

Antenna Mapping for Port

Sets the antenna mapping for PRS antenna port 6.

SCPI Command	[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:PRS:APORt6:MAPPing <string> [:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:PRS:APORt6:MAPPing?
SCPI Example	RADio:LTEFdd:WAVeform:CCARrier:DLINk:PRS:APORt6:MAPPing "1" RADio:LTEFdd:WAVeform:CCARrier:DLINk:PRS:APORt6:MAPPing?
Notes	Range: 0 or 1, as comma separated values (CSV), equal to the number of antennas selected.
Dependencies	Length equals Total Number of Antennas.
Preset	“1”
State Saved	Yes
Initial S/W Revision	A.20.01

Number of PDCCH Symbols

Sets the number of PDCCH symbols.

SCPI Command	[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:PRS:PDCCh:SYMBols:COUNt <integer> [:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:PRS:PDCCh:SYMBols:COUNt?
SCPI Example	RADio:LTEFdd:WAVeform:CCARrier:DLINk:PRS:PDCCh:SYMBols:COUNt 2 RADio:LTEFdd:WAVeform:CCARrier:DLINk:PRS:PDCCh:SYMBols:COUNt?
Range	1 to 3 (N_DL_RB > 10) 2 or 3 (N_DL_RB <= 10)
Couplings	Range depends on System Bandwidth (N_DL_RB).
Preset	2
State Saved	Yes
Min	1
Max	3
Initial S/W Revision	A.20.01

PRS Bandwidth

Selects the PRS bandwidth.

SCPI Command	[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:PRS:BWIDth F1400K\|F3M\|F5M\|F10M\|F15M\|F20M [:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:PRS:BWIDth?
SCPI Example	RADio:LTEFdd:WAVeform:CCARrier:DLINk:PRS:BWIDth F10M RADio:LTEFdd:WAVeform:CCARrier:DLINk:PRS:BWIDth?
Choices	1.4 MHz (6RB) \| 3 MHz (15RB) \| 5 MHz (25RB) \| 10 MHz (50RB) \| 15 MHz (75RB) \| 20 MHz (100RB)
Dependencies	Must be <= System Bandwidth. If System Bandwidth < PRS Bandwidth, PRS Bandwidth is auto-set to System Bandwidth.
Preset	F10M
State Saved	Yes
Initial S/W Revision	A.20.01

Number of Consecutive DL Subframes (N_PRS)

Selects the number of consecutive downlink subframes for PRS.

SCPI Command	[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:PRS:DLSFrames:COUNt N1\|N2\|N4\|N6 [:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:PRS:DLSFrames:COUNt?
SCPI Example	RADio:LTEFdd:WAVeform:CCARrier:DLINk:PRS:DLSFrames:COUNt N1 RADio:LTEFdd:WAVeform:CCARrier:DLINk:PRS:DLSFrames:COUNt?
Choices	1 subframe \| 2 subframes \| 4 subframes \| 6 subframes
Preset	N1
State Saved	Yes
Initial S/W Revision	A.20.01

PRS Configuration Index (I_PRS)

Sets the PRS configuration index. Defines both the periodicity and subframe offset.

SCPI Command	[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:PRS:CONFig:INDex <integer> [:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:PRS:CONFig:INDex?
SCPI Example	RADio:LTEFdd:WAVeform:CCARrier:DLINk:PRS:CONFig:INDex 0 RADio:LTEFdd:WAVeform:CCARrier:DLINk:PRS:CONFig:INDex?
Range	0 to 2399 Formula: (10*SFN + Floor(Slot#/2) - Delta_PRS) mod T_PRS = 0 I_PRS=0-159: T=160, Delta=I I_PRS=160-479: T=320, Delta=I-160 I_PRS=480-1119: T=640, Delta=I-480 I_PRS=1120-2399: T=1280, Delta=I-1120
Couplings	Sets PRS Periodicity (T_PRS) and PRS Subframe Offset (Delta_PRS) automatically.
Preset	0
State Saved	Yes
Min	0
Max	2399
Initial S/W Revision	A.20.01

PRS Periodicity (T_PRS)

Query only

Displays the PRS periodicity in subframes. The value is automatically set by software based on I_PRS.

SCPI Command	[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:PRS:PERiodicity?
SCPI Example	RADio:LTEFdd:WAVeform:CCARrier:DLINk:PRS:PERiodicity?
Notes	Read-only Values: 160 \| 320 \| 640 \| 1280 subframes. Formula: I_PRS=0-159: T=160 I_PRS=160-479: T=320 I_PRS=480-1119: T=640 I_PRS=1120-2399: T=1280
Couplings	Automatically set by PRS Configuration Index (I_PRS).
Preset	160
State Saved	No
Min	160
Max	1280
Initial S/W Revision	A.20.01

PRS Subframe Offset (Delta_PRS)

Query only

Displays the PRS subframe offset. Value is set by software based on I_PRS.

SCPI Command	[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:PRS:SFOFfset?
SCPI Example	RADio:LTEFdd:WAVeform:CCARrier:DLINk:PRS:SFOFfset?
Notes	Read-only Range: 0 to 1279 subframes. Formula: I_PRS=0-159: Delta=I I_PRS=160-479: Delta=I-160 I_PRS=480-1119: Delta=I-480 I_PRS=1120-2399: Delta=I-1120
Dependencies	Automatically set by PRS Configuration Index (I_PRS).
Preset	0
State Saved	No
Initial S/W Revision	A.20.01

PRS Muting Sequence Length

Selects the PRS muting sequence length.

SCPI Command	[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:PRS:MUTing:SEQuence:LENGth N2\|N4\|N8\|N16 [:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:PRS:MUTing:SEQuence:LENGth?
SCPI Example	RADio:LTEFdd:WAVeform:CCARrier:DLINk:PRS:MUTing:SEQuence:LENGth N2 RADio:LTEFdd:WAVeform:CCARrier:DLINk:PRS:MUTing:SEQuence:LENGth?
Choices	N2 \| N4 \| N8 \| N16.
Couplings	Defines the length of PRS Muting Sequence.
Preset	N2
State Saved	Yes
Initial S/W Revision	A.20.01

PRS Muting Sequence

Sets the PRS muting sequence as comma-separated values (CSV).

0 = muting

1 = not muting

SCPI Command	[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:PRS:MUTing:SEQuence <string> [:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:PRS:MUTing:SEQuence?
SCPI Example	RADio:LTEFdd:WAVeform:CCARrier:DLINk:PRS:MUTing:SEQuence "1,1" RADio:LTEFdd:WAVeform:CCARrier:DLINk:PRS:MUTing:SEQuence?
Notes	Range: 0 or 1 with comma separated input. Length = PRS Muting Sequence Length.
Couplings	Length defined by PRS Muting Sequence Length. When PRS Muting Sequence Length is 2 then it is "1,1" When PRS Muting Sequence Length is 4 then it is "1,1,1,1" When PRS Muting Sequence Length is 8 then it is "1,1,1,1,1,1,1,1" When PRS Muting Sequence Length is 16 then it is "1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1"
Preset	"1,1"
State Saved	Yes
Initial S/W Revision	A.20.01