LTE FDD

MCH (Downlink E-UTRA)

For Waveform Playback (ARB) capability.

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

General Settings

State

Antenna Mapping for Port

Number of PDCCH Symbols (Non-MBSFN Region Length)

MBSFN Area ID

Radio Frame Allocation Period

Radio Frame Allocation Offset

Subframe Allocation

Allocation Bitmap

Transmit PMCH and MBSFN RS on MBSFN Region

MBSFN Reference Signals

MBSFN RS Power

MCH/PMCH

PMCH Power

Data User Defined (MCH)

Data (MCH)

UE Category

Modulation and TBS Index Table

MCS Index

Modulation

TBS Index

TB Size

Maximum Coding Rate

RB Size

Scrambling

General Settings

MCH general channel settings.

State

Turns the MCH channel state on or off.

SCPI Command

[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:MCH:STATe ON|OFF|1|0

[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:MCH:STATe?

SCPI Example

RADio:LTEFdd:WAVeform:CCARrier:DLINk:MCH:STATe OFF

RADio:LTEFdd:WAVeform:CCARrier:DLINk:MCH:STATe?

Choices

ON | OFF

Notes

When ON, activates all MCH/PMCH settings.

When ON and MBSFN subframe is assigned, Number of PDCCH Symbols couples to PDCCH Allocations in DCI.

Preset

0

State Saved

Yes

Initial S/W Revision

A.20.01

Antenna Mapping for Port

Sets the antenna mapping for MCH port 4.

SCPI Command

[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:MCH:ANTenna:PORT4 <string>

[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:MCH:ANTenna:PORT4?

SCPI Example

RADio:LTEFdd:WAVeform:CCARrier:DLINk:MCH:ANTenna:PORT4 "1"

RADio:LTEFdd:WAVeform:CCARrier:DLINk:MCH:ANTenna:PORT4?

Range

0 or 1 with comma separated input.

Length equals Total Number of Antennas.

Couplings

Value will depend on Total Number of Antennas.

Total Number of Antenna=TOA

  • When TOA=1 then Antenna Mapping for Port 4 is "1"

  • When TOA=2 then Antenna Mapping for Port 4 is "1,1"

  • When TOA=4 then Antenna Mapping for Port 4 is "1,1,1,1"

  • When TOA=8 then Antenna Mapping for Port 4 is "1,1,1,1,1,1,1,1"

Preset

"1"

State Saved

Yes

Min

N/A

Max

N/A

Initial S/W Revision

A.20.01

Number of PDCCH Symbols (Non-MBSFN Region Length)

Sets the number of PDCCH symbols (Non-MBSFN region length).

SCPI Command

[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:MCH:PDCCh:SYMBol:COUNt <integer>

[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:MCH:PDCCh:SYMBol:COUNt?

SCPI Example

RADio:LTEFdd:WAVeform:CCARrier:DLINk:MCH:PDCCh:SYMBol:COUNt 2

RADio:LTEFdd:WAVeform:CCARrier:DLINk:MCH:PDCCh:SYMBol:COUNt?

Range

Range = 1 to 2 when N_DL_RB > 10 and 1 or 2 CRS antenna ports.

Range = 2 only in case of 4 CRS antenna ports.

Range depends on antenna configuration and N_DL_RB.

Dependencies

Enabled when MCH State is ON and MBSFN subframe is assigned.

Coupled to PDCCH Allocations in DCI for MBSFN subframes.

Preset

2

State Saved

Yes

Min

1

Max

2

Initial S/W Revision

A.20.01

MBSFN Area ID

Sets the MBSFN area identifier.

SCPI Command

[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:MCH:MBSFn:AREa:ID <integer>

[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:MCH:MBSFn:AREa:ID?

SCPI Example

RADio:LTEFdd:WAVeform:CCARrier:DLINk:MCH:MBSFn:AREa:ID 0

RADio:LTEFdd:WAVeform:CCARrier:DLINk:MCH:MBSFn:AREa:ID?

Range

0 to 255 (Integer).

Used for scrambling of MBSFN RS and PMCH.

Preset

0

State Saved

Yes

Min

0

Max

255

Initial S/W Revision

A.20.01

Radio Frame Allocation Period

Selects the radio frame allocation period.

SCPI Command

[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:MCH:RADio:FRAMe:PERiod FRAMe1|FRAMe2|FRAMe4|FRAMe8|FRAMe16|FRAMe32

[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:MCH:RADio:FRAMe:PERiod?

SCPI Example

RADio:LTEFdd:WAVeform:CCARrier:DLINk:MCH:RADio:FRAMe:PERiod FRAMe1

RADio:LTEFdd:WAVeform:CCARrier:DLINk:MCH:RADio:FRAMe:PERiod?

Choices

1 frame | 2 frames | 4 frames | 8 frames | 16 frames | 32 frames

Formula: SFN mod Radio Frame Allocation Period = Radio Frame Allocation Offset.

Preset

FRAMe1

State Saved

Yes

Min

N/A

Max

N/A

Initial S/W Revision

A.20.01

Radio Frame Allocation Offset

Sets the radio frame allocation offset.

SCPI Command

[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:MCH:RADio:FRAMe:OFFSet <integer>

[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:MCH:RADio:FRAMe:OFFSet?

SCPI Example

RADio:LTEFdd:WAVeform:CCARrier:DLINk:MCH:RADio:FRAMe:OFFSet 0

RADio:LTEFdd:WAVeform:CCARrier:DLINk:MCH:RADio:FRAMe:OFFSet?

Range

0 to 7 (Integer). Upper range = MIN(Radio Frame Allocation Period - 1, 7). Formula: SFN mod Period = Offset.

  • 0 when Radio Frame Allocation Period is 1 frame

  • 1 when Radio Frame Allocation Period is 2 frames

  • 3 when Radio Frame Allocation Period is 4 frames

  • 7 when Radio Frame Allocation Period is 8 frames/32 frames

Dependencies

Upper range limited to MIN(Radio Frame Allocation Period - 1, 7).

Preset

0

State Saved

Yes

Min

0

Max

7

Initial S/W Revision

A.20.01

Subframe Allocation

Sets the subframe allocation pattern.

SCPI Command

[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:MCH:SUBFrame:ALLocation?

SCPI Example

RADio:LTEFdd:WAVeform:CCARrier:DLINk:MCH:SUBFrame:ALLocation?

Choices

1 frame | 4 frames.

4 frames available only if Radio Frame Allocation Period is 4, 8, 16, or 32.

Preset

FRAM1

State Saved

Yes

Min

N/A

Max

N/A

Initial S/W Revision

A.20.01

Allocation Bitmap

Sets the allocation bitmap.

SCPI Command

[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:MCH:ALLocation:BITMap <string>

[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:MCH:ALLocation:BITMap?

SCPI Example

RADio:LTEFdd:WAVeform:CCARrier:DLINk:MCH:ALLocation:BITMap "1,1,1,1,1,1"

RADio:LTEFdd:WAVeform:CCARrier:DLINk:MCH:ALLocation:BITMap?

Notes

Values: 0 or 1, comma separated.

Length: Depends on Subframe Allocation setting. 6 bits for 1 frame, 24 bits for 4 frames.

"1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1" when Subframe Allocation is 4 frames.

Preset

"1,1,1,1,1,1"

State Saved

Yes

Min

N/A

Max

N/A

Initial S/W Revision

A.20.01

Transmit PMCH and MBSFN RS on MBSFN Region

Enables or disables PMCH and MBSFN RS transmission on the MBSFN region.

SCPI Command

[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:MCH:TRANsmit:PMCH:MBSFn:RS ON|OFF|0|1

[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:MCH:TRANsmit:PMCH:MBSFn:RS?

SCPI Example

RADio:LTEFdd:WAVeform:CCARrier:DLINk:MCH:TRANsmit:PMCH:MBSFn:RS ON

RADio:LTEFdd:WAVeform:CCARrier:DLINk:MCH:TRANsmit:PMCH:MBSFn:RS?

Choices

ON | OFF

Used for Dynamic Spectrum Sharing (DSS) with NR5G carrier.

Dependencies

Enabled when MCH State is ON.

Preset

1

State Saved

Yes

Min

N/A

Max

N/A

Initial S/W Revision

A.20.01

MBSFN Reference Signals

MBSFN reference signal settings.

MBSFN RS Power

Sets the power level, in dB for the MBSFN reference signals.

SCPI Command

[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:MCH:MBSFn:RS:POWer <rel_ampl>

[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:MCH:MBSFn:RS:POWer?

SCPI Example

RADio:LTEFdd:WAVeform:CCARrier:DLINk:MCH:MBSFn:RS:POWer 0.0

RADio:LTEFdd:WAVeform:CCARrier:DLINk:MCH:MBSFn:RS:POWer?

Range

-60.000 to 20.000 dB

Preset

0

State Saved

Yes

Min

-60

Max

20

Initial S/W Revision

A.20.01

MCH/PMCH

MCH/PMCH channel configuration settings.

PMCH Power

Sets the power level, in dB for the PMCH channel.

SCPI Command

[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:MCH:PMCH:POWer <rel_ampl>

[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:MCH:PMCH:POWer?

SCPI Example

RADio:LTEFdd:WAVeform:CCARrier:DLINk:MCH:PMCH:POWer 0.0

RADio:LTEFdd:WAVeform:CCARrier:DLINk:MCH:PMCH:POWer?

Range

-60.000 to 20.000 dB

Preset

0

State Saved

Yes

Min

-60

Max

20

Initial S/W Revision

A.20.01

Data (MCH)

Selects the MCH data source.

SCPI Command

[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:MCH:DATA PN9|PN15|ACONfig

[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:MCH:DATA?

SCPI Example

RADio:LTEFdd:WAVeform:CCARrier:DLINk:MCH:DATA PN9

RADio:LTEFdd:WAVeform:CCARrier:DLINk:MCH:DATA?

Choices

PN9 | PN15 | ACONfig

Preset

PN9

State Saved

Yes

Min

N/A

Max

N/A

Initial S/W Revision

A.20.01

Data User Defined (MCH)

Sets the MCH data source when the Data is set to User Defined.

SCPI Command

[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:MCH:DATA:USER<string>

[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:MCH:DATA:USER?

SCPI Example

RADio:LTEFdd:WAVeform:CCARrier:DLINk:MCH:DATa:USER "00000000"

RADio:LTEFdd:WAVeform:CCARrier:DLINk:MCH:DATa:USER?

Preset

"00000000"

State Saved

Yes

Min

N/A

Max

N/A

Initial S/W Revision

A.20.01

UE Category

Select the UE category for the MCH channel.

SCPI Command

[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:MCH:UE:CATegory CAT0|CAT1|CAT2|CAT3|CAT4|CAT5|CAT6|CAT7|CAT8|CAT9|CAT10|CAT11|CAT12|CAT13|CAT14|CAT15

[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:MCH:UE:CATegory?

SCPI Example

RADio:LTEFdd:WAVeform:CCARrier:DLINk:MCH:UE:CATegory CAT15

RADio:LTEFdd:WAVeform:CCARrier:DLINk:MCH:UE:CATegory?

Notes

Choices: 0 to 15 (CAT1 through CAT15). Determines maximum transport block size.

Dependencies

Determines maximum TB Size for MCH.

Preset

CAT15

State Saved

Yes

Min

N/A

Max

N/A

Initial S/W Revision

A.20.01

Modulation and TBS Index Table

Selects the modulation and TBS index table for the MCH channel.

SCPI Command

[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:MCH:MODu:TBS:TABLe TABLe1|TABLe2

[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:MCH:MODu:TBS:TABLe?

SCPI Example

RADio:LTEFdd:WAVeform:CCARrier:DLINk:MCH:MODu:TBS:TABLe TABLe1

RADio:LTEFdd:WAVeform:CCARrier:DLINk:MCH:MODu:TBS:TABLe?

Choices

Table 1 | Table 2

Table 1: 36.213 Table 7.1.7.1-1 (QPSK/16QAM/64QAM, MCS 0-28, TBS 0-26)

Table 2: 36.213 Table 7.1.7.1-1A (QPSK/16QAM/64QAM/256QAM, MCS 0-27, TBS 0-33)

Dependencies

Controls available range for MCS Index, Modulation, and TBS Index.

Preset

TABLe1

State Saved

Yes

Min

N/A

Max

N/A

Initial S/W Revision

A.20.01

MCS Index

Selects the MCS index for the MCH channel.

SCPI Command

[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:MCH:MCS:INDex OFF|MCS0|MCS1|MCS2|MCS3|MCS4|MCS5|MCS6|MCS7|MCS8|MCS9|MCS10|MCS11|MCS12|MCS13|MCS14|MCS15|MCS16|MCS17|MCS18|MCS19|MCS20|MCS21|MCS22|MCS23|MCS24|MCS25|MCS26|MCS27|MCS28

[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:MCH:MCS:INDex?

SCPI Example

RADio:LTEFdd:WAVeform:CCARrier:DLINk:MCH:MCS:INDex MCS0

RADio:LTEFdd:WAVeform:CCARrier:DLINk:MCH:MCS:INDex?

Choices

Off | 0 to 28 (Table 1) or Off | 0 to 27 (Table 2)

Range depends on Modulation and TBS Index Table selection.

Notes

  • When MCS Index = Off, Modulation and TBS Index are editable.

  • When MCS Index = 0-28, Modulation and TBS Index become read-only and are automatically set.

Preset

MCS0

State Saved

Yes

Min

N/A

Max

N/A

Initial S/W Revision

A.20.01

Modulation

Query only

Displays the modulation type. Derived from MCS Index.

SCPI Command

[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:MCH:MOD:TYPe QPSK|16Qam|64Qam|256Qam

[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:MCH:MOD:TYPe?

SCPI Example

RADio:LTEFdd:WAVeform:CCARrier:DLINk:MCH:MODu:TYPe QPSK

RADio:LTEFdd:WAVeform:CCARrier:DLINk:MCH:MODu:TYPe?

Choices

QPSK | 16QAM | 64QAM | 256QAM

Dependencies

Automatically set by MCS Index (per 3GPP TS 36.213 Table 7.1.7.1-1 or 7.1.7.1-1A).

Editable only when MCS Index = Off.
256Qam is settable when Modulation and TBS Index Table is Table 2.

Preset

QPSK

State Saved

No

Min

N/A

Max

N/A

Initial S/W Revision

A.20.01

TBS Index

Query only

Displays the TBS index. Derived from MCS Index.

SCPI Command

[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:MCH:TBS:INDex OFF|TBS0|TBS1|TBS2|TBS3|TBS4|TBS5|TBS6|TBS7|TBS8|TBS9|TBS10|TBS11|TBS12|TBS13|TBS14|TBS15|TBS16|TBS17|TBS18|TBS19|TBS20|TBS21|TBS22|TBS23|TBS24|TBS25|TBS26|TBS27|TBS28|TBS29|TBS30|TBS31|TBS32|TBS33

[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:MCH:TBS:INDex?

SCPI Example

RADio:LTEFdd:WAVeform:CCARrier:DLINk:MCH:TBS:INDex TBS2

RADio:LTEFdd:WAVeform:CCARrier:DLINk:MCH:TBS:INDex?

Choices

Off | 0 to 26 (Table 1) or Off | 0 to 33 (Table 2)

Dependencies

Automatically set by MCS Index. Editable only when MCS Index = Off.

Notes

When TBS Index = Off, TB Size is editable.

When TBS Index = 0-26/33, TB Size is auto-decided.

Preset

TBS0

State Saved

No

Min

N/A

Max

N/A

Initial S/W Revision

A.20.01

TB Size

Query only

Displays the transport block size, in bits.

SCPI Command

[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:MCH:TBS:SIZE <integer>

[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:MCH:TBS:SIZE?

SCPI Example

RADio:LTEFdd:WAVeform:CCARrier:DLINk:MCH:TBS:SIZE 2

RADio:LTEFdd:WAVeform:CCARrier:DLINk:MCH:TBS:SIZE?

Range

1 to 75376 (Table 1) or 1 to 97896 (Table 2).

Maximum depends on UE Category.

Dependencies

Automatically set by TBS Index. Editable only when TBS Index = Off.

Preset

1384

State Saved

No

Min

1

Max

97896

Initial S/W Revision

A.20.01

Maximum Coding Rate

Query only

Displays the maximum coding rate.

SCPI Command

[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:MCH:MAX:CODing:RATe <real>

[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:MCH:MAX:CODing:RATe?

SCPI Example

RADio:LTEFdd:WAVeform:CCARrier:DLINk:MCH:MAX:CODing:RATe 0.931

RADio:LTEFdd:WAVeform:CCARrier:DLINk:MCH:MAX:CODing:RATe?

Range

0.001 to 1.000.

Formula: Effective code rate = DL information bits (incl. CRC) / physical channel bits.

Error displayed if code rate exceeds maximum.

Preset

0.931

State Saved

Yes

Min

0.001

Max

1

Initial S/W Revision

A.20.01

RB Size

Query only

Displays the number of resource blocks for the MCH channel. Automatically set by System Bandwidth.

SCPI Command

[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:MCH:RB:SIZe?

SCPI Example

RADio:LTEFdd:WAVeform:CCARrier:DLINk:MCH:RB:SIZe?

Notes

Value depends on System Bandwidth (e.g., 25 for 5 MHz, 50 for 10 MHz).

Preset

25

State Saved

No

Min

6

Max

100

Initial S/W Revision

A.20.01

Scrambling

Turns scrambling on or off for the MCH channel.

Applies to DCI, BCH, CFI, HI, and MCH channels.

SCPI Command

[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:MCH:SCRambling ON|OFF|1|0

[:SOURce]:RADio:LTEFdd:WAVeform[:ARB]:CCARrier<channel>:DLINk:MCH:SCRambling?

SCPI Example

RADio:LTEFdd:WAVeform:CCARrier:DLINk:MCH:SCRambling ON

RADio:LTEFdd:WAVeform:CCARrier:DLINk:MCH:SCRambling?

Choices

ON | OFF

Preset

1

State Saved

Yes

Min

N/A

Max

N/A

Initial S/W Revision

A.20.01

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