Use this drop-down menu to select a modulation type from several supported formats. A single data segment using that modulation type appears in the segment list below. Click the cell in the Constellation column to open the Constellation Setting window, providing a graphical display and editing features. Quick setups enable you to configure complex signals for signal generation, equivalent to 89600B VSA setups in signal analysis.

DVB-S2 and DVB-S2X quick setups also add a PLHEADER segment before the data segment, as defined in the standard.

Quick Setups IQ Settings

Standard		Modulation	Symbol Rate	Filter
DVB-S2	QPSK		1.0 Msps	RNYQ (0.5)
	8PSK
	16APSK	4+12APSK 2/3, 4+12APSK 3/4, 4+12APSK 4/5, 4+12APSK 5/6, 4+12APSK 8/9, 4+12APSK 9/10
	32APSK	4+12+16APSK 3/4, 4+12+16APSK 4/5, 4+12+16APSK 5/6, 4+12+16APSK 8/9, 4+12+16APSK 9/10
DVB-S2X	QPSK		1.0 Msps	RNYQ (0.5)
	8PSK
	8APSK	2+4+2APSK 100/180, 2+4+2APSK 104/180
	16APSK	4+12APSK Normal 26/45; 4+12APSK Normal 3/5; 4+12APSK Normal 28/45; 4+12APSK Normal 23/36; 4+12APSK Normal 25/36; 4+12APSK Normal 13/18; 4+12APSK Normal 140/180; 4+12APSK Normal 154/180; 4+12APSK Short 7/15; 4+12APSK Short 8/15; 4+12APSK Short 26/45; 4+12APSK Short 3/5; 4+12APSK Short 32/45; 8+8APSK Normal 90/180, 96/180, 100/180; 8+8APSK Normal 18/30; 8+8APSK Normal 20/30
	32APSK	4+12+16APSK Normal 2/3, 4+12+16APSK Short 2/3, 4+12+16APSK Short 32/45, 4+8+4+16APSK 128/180, 4+8+4+16APSK 132/180, 4+8+4+16APSK 140/180
	64APSK	16+16+16+16APSK 128/180, 8+16+20+20APSK 7/9, 8+16+20+20APSK 4/5, 8+16+20+20APSK 5/6, 4+12+20+28APSK 132/180,
	128APSK	128APSK 135/180, 128APSK 140/180
	256APSK	256APSK 116/180, 256APSK 124/180, 256APSK 128/180, 256APSK 135/180, 256APSK 20/30, 256APSK 22/30
APCO25	C4FM	4FSK (0.6 kHz, 1.8 kHz, -0.6 kHz, -1.8 kHz)	4.8 ksps	NYQ (0.2) + 1/Sinc
	CQPSK*	Pi/4 DQPSK	4.8 ksps	NYQ
	HCPM	4FSK (1 kHz, 3 kHz, -1 kHz, -3 kHz)	6 ksps	APCO25 HCPM
	HDQPSK	Pi/4 DQPSK	6 ksps	APCO25 HDQPSK
TETRA		Pi/4 DQPSK	18 ksps	RNYQ (0.35)
NXDN	4800 bps	4FSK (0.35 kHz, 1.05 kHz, -0.35 kHz, -1.05 kHz)	2.4 ksps	RNYQ (0.2) + Sinc
NXDN	9600 bps	4FSK (0.8 kHz, 2.4 kHz, -0.8 kHz, 2.4 kHz)	4.8 ksps	RNYQ (0.2) + Sinc
dPMR		4FSK (0.35 kHz, 1.05 kHz, -0.35 kHz, -1.05 kHz)	2.4 ksps	RNYQ (0.2)
DECT		2FSK (-288 kHz, 288 kHz)	1.152 Msps	Gaussian (0.5)
DMR		4FSK (0.648 kHz, 1.944 kHz, -0.648 kHz, -1.944 kHz)	4.8 ksps	RNYQ (0.2)
ARIB	T98/T61*	Pi/4 DQPSK	9.6 ksps	RNYQ (0.2)
ARIB	T102	4FSK (0.33 kHz, 0.99 kHz, -0.33 kHz, -0.99 kHz)	4.8 ksps	ARIB T102 RNYQ (0.2) + Gaussian (0.769)
Zigbee	BPSK	BPSK	600 ksps	NYQ (1)
Zigbee	OQPSK	OQPSK	1 Msps	Half Sine
WiSUN (802.15.4g)	2FSK 50/1	2FSK (-25 kHz, 25 kHz)	50 ksps	Gaussian (0.5)
WiSUN (802.15.4g)	2FSK 100/0.5	2FSK (-25 kHz, 25 kHz)	100 ksps	Gaussian (0.5)
ITU-T G.9959	R2	2FSK (-20 kHz, 20 kHz)	40 ksps	Rectangle
ITU-T G.9959	R3	2FSK (-29 kHz, 29 kHz)	100 ksps	Gaussian (0.6)
802.15.3d		CES: pi/2 BPSK Frame Header: pi/2 BPSK Payload: 64QAM	25.92 Gsps	RNYQ (0.25)

* For APCO25 CQPSK and ARIB T98/T61, the ALC is set to off to achieve better EVM. For all other cases, the ALC is on.

Payload, Idle Interval, Ramp Symbols, and Number of Symbols will be set to default values.

SCPI Command	[:SOURce]:RADio:CMODulation:WAVeform[:ARB]:IQ:SETup C4FM\|HCPM\|TETRa\|DECT\|HDQPsk\|ZIGBEE_BPSK\|ZIGBEE_O_QPSK\|DMR\|ARIB_T98\| ARIB_T61\|ARIB_T102\|WI_SUN_2FSK_50_1\|WI_SUN_2FSK_100_0P5\|ITU_T_G9959_R2\|ITU_T_G9959_R3\| CQPSk\| NXDN_4800BPS\| NXDN_9600BPS\| DPMR\|DVB_S2X_256APSK_116_180\| DVB_S2X_256APSK_124_180\| DVB_S2X_256APSK_135_180\| DVB_S2X_256APSK_20_30\| DVB_S2X_256APSK_22_30\| DVB_S2X_128APSK_135_180\| DVB_S2X_128APSK_140_180\| DVB_S2X_16_16_16_16APSK_128_180\| DVB_S2X_8_16_20_20APSK_7_9\| DVB_S2X_8_16_20_20APSK_4_5\| DVB_S2X_8_16_20_20APSK_5_6\| DVB_S2X_4_12_20_28APSK_132_180\| DVB_S2X_4_12_16APSK_NORMAL_2_3\| DVB_S2X_4_12_16APSK_SHORT_2_3\| DVB_S2X_4_12_16APSK_SHORT_32_45\| DVB_S2X_4_8_4_16APSK_128_180\| DVB_S2X_4_8_4_16APSK_132_180\| DVB_S2X_4_8_4_16APSK_140_180\| DVB_S2X_4_12APSK_NORMAL_26_45\| DVB_S2X_4_12APSK_NORMAL_3_5\| DVB_S2X_4_12APSK_NORMAL_28_45\| DVB_S2X_4_12APSK_NORMAL_23_36\| DVB_S2X_4_12APSK_NORMAL_25_36\| DVB_S2X_4_12APSK_NORMAL_13_18\| DVB_S2X_4_12APSK_NORMAL_140_180\| DVB_S2X_4_12APSK_NORMAL_154_180\| DVB_S2X_4_12APSK_SHORT_7_15\| DVB_S2X_4_12APSK_SHORT_8_15\| DVB_S2X_4_12APSK_SHORT_26_45\| DVB_S2X_4_12APSK_SHORT_3_5\| DVB_S2X_4_12APSK_SHORT_32_45\| DVB_S2X_8_8APSK_NORMAL_90_180_96_180_100_180\| DVB_S2X_8_8APSK_NORMAL_18_30\| DVB_S2X_8_8APSK_NORMAL_20_30\| DVB_S2X_2_4_2APSK_100_180\| DVB_S2X_2_4_2APSK_104_180\| DVB_S2X_SCRAMBLED_2_4_2APSK_100_180\| DVB_S2X_SCRAMBLED_2_4_2APSK_104_180\| DVB_S2X_SCRAMBLED_256APSK_20_30\| DVB_S2X_SCRAMBLED_256APSK_22_30\| DVB_S2X_QPSK\| DVB_S2X_8PSK \| DVB_S2_QPSK\| DVB_S2_8PSK\| DVB_S2_4_12APSK_2_3\| DVB_S2_4_12APSK_3_4\| DVB_S2_4_12APSK_4_5\| DVB_S2_4_12APSK_5_6\| DVB_S2_4_12APSK_8_9\| DVB_S2_4_12APSK_9_10\| DVB_S2_4_12_16APSK_3_4\|DVB_S2_4_12_16APSK_4_5 \| DVB_S2_4_12_16APSK_5_6 \| DVB_S2_4_12_16APSK_8_9\| DVB_S2_4_12_16APSK_9_10\| _802_15_3D
SCPI Example
Couplings
Preset
State Saved	No
Initial S/W Revision	A.14.00

Save to 89600 VSA Setup

This feature saves the Custom IQ configuration as an 89600B VSA setup file, making it easier to configure complex constellations, such as 256APSK.

VSA software must be version 18.0 or later to support Custom IQ demodulation. If there is more than one data segment configured in the list, they will be saved as VSA setup file with FlexFrame measurement, which was supported from VSA2022 release. Idle segments cannot be saved to the setup file.

ASK & PSK & QAM

Differential and offset modulation types (e.g. pi/4 DQPSK or OQPSK) are found under DigitalDemod on the VSA.

The VSA does not support the APCO25 HDQPSK filter.

FSK

FSK configurations are found under DigitalDemod on the VSA.

The VSA does not support ARIB T102 and NXDN filters.

For added convenience, you can save the VSA setup as a quick setup in the VSA's Custom IQ Demod Property window. To do this, recall the PathWave Signal Generation VSA setup file, perform the measurement, and then click Save As Quick Setup. Now, whenever you click Quick Setups, you will find your previously saved setup listed among the other setups provided with the VSA software. Using this method, you no longer need to recall the PathWave Signal Generation VSA setup file each time you want to perform a measurement.

Custom IQ Selection

Custom IQ Type

Select the type of Custom IQ.

SCPI Command	[:SOURce]:RADio:CMODulation:WAVeform[:ARB]:IQ:TYPE QAPSk\|FSK\|SOQPsk\|ARTM [:SOURce]:RADio:CMODulation:WAVeform[:ARB]:IQ:TYPE?
SCPI Example
Couplings
Preset	QAPSk
State Saved	Yes
Initial S/W Revision	A.14.00

FSK Settings

FSK Type

Choices: 2-FSK | 4-FSK | 8-FSK | 16-FSK | 32-FSK | 64-FSK | MSK

Default: 2-FSK

Selects the FSK type.

SCPI Command	[:SOURce]:RADio:CMODulation:WAVeform[:ARB]:IQ:FSK:TYPE FSK2\|FSK4\|FSK8\|FSK16\|FSK32\|FSK64\|MSK [:SOURce]:RADio:CMODulation:WAVeform[:ARB]:IQ:FSK:TYPE?
SCPI Example
Couplings
Preset	FSK2
State Saved	Yes
Initial S/W Revision	A.14.00

FSK Deviation Reference

Sets the FSK deviation reference.

SCPI Command	[:SOURce]:RADio:CMODulation:WAVeform[:ARB]:IQ:FSK:DEViation:REFerence <real> [:SOURce]:RADio:CMODulation:WAVeform[:ARB]:IQ:FSK:DEViation:REFerence?
SCPI Example
Couplings
Preset	1000000
State Saved	Yes
Minimum Value	1
Maximum Value	4e9
Default Value	1 MHz
Note	In the current SCPI design, the dynamic maximum value is not supported and the maximum value is fixed to 4e9. However, the maximum value is coupled to the correct value. For example, current value is 30000. If symbol rate is set to 2000, then value will be coupled to 20000.
Initial S/W Revision	A.14.00

Symbol Rate

Sets the symbol rate of the FSK signal.

SCPI Command	[:SOURce]:RADio:CMODulation:WAVeform[:ARB]:IQ:FSK:SRATe <real> [:SOURce]:RADio:CMODulation:WAVeform[:ARB]:IQ:FSK:SRATe?
SCPI Example
Couplings
Preset	1000000
State Saved	Yes
Minimum Value	1000
Maximum Value	4000000000
Default Value	1 Msps
Initial S/W Revision	A.14.00

Payload Data

Choices: PN9 | PN15 | PN23 | Custom | User File

Default: PN9

Opens the Data Setup editor to configure payload bits. You can also load, save, and create custom bit patterns.

SCPI Command	[:SOURce]:RADio:CMODulation:WAVeform[:ARB]:IQ:FSK:DATA:TYPE PN9\|PN15\|PN23\|CUSTom\|FILE [:SOURce]:RADio:CMODulation:WAVeform[:ARB]:IQ:FSK:DATA:TYPE?
SCPI Example
Couplings
Preset	PN9
State Saved	Yes
Initial S/W Revision	A.14.00

Pattern Bits

Create custom bit patterns when the Payload Data type is set to Custom.

SCPI Command	[SOURce]:RADio:CMODulation:WAVeform[:ARB]:IQ:FSK:DATA [SOURce]:RADio:CMODulation:WAVeform[:ARB]:IQ:FSK:DATA?
SCPI Example
Couplings
Preset
State Saved	Yes
Initial S/W Revision	A.14.00

User File

Set the Payload data file name when the Payload Data type is set to User File.

SCPI Command	[SOURce]:RADio:CMODulation:WAVeform[:ARB]:IQ:FSK:DATA:FILE [SOURce]:RADio:CMODulation:WAVeform[:ARB]:IQ:FSK:DATA:FILE?
SCPI Example
Couplings	If you specify just the file name or relative path + file name, then it will be converted to absolute path + file name. Examples: For just the file name: custom.txt, it will be converted to <Documents>\Keysight\PathWave\SignalGenerator\Apps\custom.txt. For relative path + file name: payload\custom.txt, it will be converted to <Documents>\Keysight\PathWave\SignalGenerator\Apps\payload\custom.txt. If you specify the absolute path + file name, for example, C:\temp\test.txt, on the instrument, then error +671,"Application error;Invalid file path c:\temp\test.rxt." will be generated.
Preset	""
State Saved	Yes
Initial S/W Revision	A.14.00

PN Seed(Hex)

Set the Payload PN Seed when the Payload Data type is set to PN9, PN15, or PN23.

SCPI Command	[SOURce]:RADio:CMODulation:WAVeform[:ARB]:IQ:FSK:DATA:PNSeed <integer> [SOURce]:RADio:CMODulation:WAVeform[:ARB]:IQ:FSK:DATA:PNSeed?
SCPI Example
Couplings
Preset	1FF
Min	0
Max	8388607
State Saved	Yes
Initial S/W Revision	A.16.00

Offset

Set the Payload offset. This setting is applicable to all Payload Data types.

SCPI Command	[SOURce]:RADio:CMODulation:WAVeform[:ARB]:IQ:FSK:DATA:OFFSet <integer> [SOURce]:RADio:CMODulation:WAVeform[:ARB]:IQ:FSK:DATA:OFFSet?
SCPI Example
Couplings
Preset	0
Min	0
Max	2147483647
State Saved	Yes
Initial S/W Revision	A.16.00

Number of Symbols

Sets the length of the FSK symbols.

SCPI Command	[:SOURce]:RADio:CMODulation:WAVeform[:ARB]:IQ:FSK:SYMBol:COUNt <integer> [:SOURce]:RADio:CMODulation:WAVeform[:ARB]:IQ:FSK:SYMBol:COUNt?
SCPI Example
Couplings
Preset	1000
State Saved	Yes
Minimum Value	100
Maximum Value	8388608
Default Value	1000
Initial S/W Revision	A.14.00

Idle Interval

Sets the idle interval in-between FSK frames in seconds. When the idle interval is set to zero, a continuous waveform will be generated.

SCPI Command	[:SOURce]:RADio:CMODulation:WAVeform[:ARB]:IQ:FSK:IDLE:INTerval <real> [:SOURce]:RADio:CMODulation:WAVeform[:ARB]:IQ:FSK:IDLE:INTerval?
SCPI Example
Couplings
Preset	0
State Saved	Yes
Minimum Value	0
Maximum Value	200 ms
Default Value	0 us
Initial S/W Revision	A.14.00

Ramp Symbols

Sets the number of ramp symbols for burst signal (Idle Interval is not zero).

SCPI Command	[:SOURce]:RADio:CMODulation:WAVeform[:ARB]:IQ:FSK:RAMP:SYMBols <integer> [:SOURce]:RADio:CMODulation:WAVeform[:ARB]:IQ:FSK:RAMP:SYMBols?
SCPI Example
Couplings
Preset	0
State Saved	Yes
Minimum Value	0
Maximum value	20
Default Value	0
Initial S/W Revision	A.14.00

Filter

Default: Rectangle

Selects the FSK filter type.

SCPI Command	[:SOURce]:RADio:CMODulation:WAVeform[:ARB]:IQ:FSK:FILTer:TYPE RNYQuist\|NYQuist\|GAUSsian\|\|RECTangle\|UDEFined\|AC4Fm\|AHCPm\|AT102\|NXDN [:SOURce]:RADio:CMODulation:WAVeform[:ARB]:IQ:FSK:FILTer:TYPE?
SCPI Example
Couplings
Preset	RECTangle
State Saved	Yes
Initial S/W Revision	A.14.00

Alpha

Sets the alpha factor of the Root Nyquist or Nyquist filter.

SCPI Command	[:SOURce]:RADio:CMODulation:WAVeform[:ARB]:IQ:FSK:FILTer:ALPHa <real> [:SOURce]:RADio:CMODulation:WAVeform[:ARB]:IQ:FSK:FILTer:ALPHa?
SCPI Example
Couplings
Preset	0.5
State Saved	Yes
Minimum Value	0.01
Maximum Value	1
Default Value	0.5
Initial S/W Revision	A.14.00

BT

Sets the BT product of the Gaussian filter.

SCPI Command	[:SOURce]:RADio:CMODulation:WAVeform[:ARB]:IQ:FSK:FILTer:BT <real> [:SOURce]:RADio:CMODulation:WAVeform[:ARB]:IQ:FSK:FILTer:BT?
SCPI Example
Couplings
Preset	0.5
State Saved	Yes
Minimum Value	0.1
Maximum Value	1
Default Value	0.5
Initial S/W Revision	A.14.00

Length(symbol)

Sets the length of the filter in symbols.

SCPI Command	[:SOURce]:RADio:CMODulation:WAVeform[:ARB]:IQ:FSK:FILTer:SYMBol:LENGth <integer> [:SOURce]:RADio:CMODulation:WAVeform[:ARB]:IQ:FSK:FILTer:SYMBol:LENGth?
SCPI Example
Couplings
Preset	32
State Saved	Yes
Minimum Value	1
Maximum Value	2048
Initial S/W Revision	A.14.00

Filter Coefficient

Opens a Filter Editor window where you can import, export, and edit filter coefficients. A convenient plot of the filter's impulse response is displayed and updates as coefficients are changed. Imported and exported coefficient files are in text (*.txt) or comma-separated values (*.csv) format.

SCPI Command	[:SOURce]:RADio:CMODulation:WAVeform[:ARB]:IQ:FSK:FILTer:COEFficient [:SOURce]:RADio:CMODulation:WAVeform[:ARB]:IQ:FSK:FILTer:COEFficient?
SCPI Example
Couplings
Preset	1
State Saved	Yes
Initial S/W Revision	A.14.00

Frequency Deviation

Reset to Default

Resets Frequency Deviation Value to the default value.

SCPI Command	[:SOURce]:RADio:CMODulation:WAVeform[:ARB]:IQ:FSK:FREQuency:DEViation:PRESet
SCPI Example
Couplings
Preset
State Saved	No
Initial S/W Revision	A.14.00

Symbol

Displays the FSK symbol.

SCPI Command	[:SOURce]:RADio:CMODulation:WAVeform[:ARB]:IQ:FSK:FREQuency:DEViation<deviation>:SYMBol?
SCPI Example
Couplings	It is read-only setting. The value is the hex format of index of this deviation.
Preset
State Saved	Yes
Initial S/W Revision	A.14.00

Frequency Deviation Value

Set the FSK deviation value for each FSK symbol.

SCPI Command	[:SOURce]:RADio:CMODulation:WAVeform[:ARB]:IQ:FSK:FREQuency:DEViation<channel>:VALue <real> [:SOURce]:RADio:CMODulation:WAVeform[:ARB]:IQ:FSK:FREQuency:DEViation<channel>:VALue?
SCPI Example
Couplings	Range: -FSK Deviation Reference - FSK Deviation Reference
Preset	0
State Saved	Yes
Initial S/W Revision	A.14.00

Frequency Deviation (%)

Set the FSK deviation by percentage for each FSK symbol.

SCPI Command	[:SOURce]:RADio:CMODulation:WAVeform[:ARB]:IQ:FSK:FREQuency:DEViation<channel>:PERCentage <real> [:SOURce]:RADio:CMODulation:WAVeform[:ARB]:IQ:FSK:FREQuency:DEViation<channel>:PERCentage?
SCPI Example
Couplings
Preset	0
State Saved	Yes
Minimum Value	-100
Maximum Value	100
Initial S/W Revision	A.14.00