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 (video). Quick setups enable you to configure complex signals for signal generation, equivalent to 89600B VSA setups in signal analysis.
Quick Setups IQ Settings
|
Standard |
Modulation |
Symbol Rate |
Filter |
|
|---|---|---|---|---|
|
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 |
|
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) |
|
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) |
|
OQPSK |
OQPSK |
1 Msps |
Half Sine |
|
|
WiSUN |
2FSK 50/1 |
2FSK (-25 kHz, 25 kHz) |
50 ksps |
Gaussian (0.5) |
|
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 |
|
R3 |
2FSK (-29 kHz, 29 kHz) |
100 ksps |
Gaussian (0.6) |
|
* 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.
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, only the selected data segment (indicated by the graphical display at the bottom) will be saved to the VSA setup file. Idle segments cannot be saved to the setup file.
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 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 Signal Studio VSA setup file, perform the measurement, and then click . Now, whenever you click , 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 Signal Studio VSA setup file each time you want to perform a measurement.
Choices: ASK & PSK & QAM | FSK | SOQPSK | ARTM Multi-h CPM
Default: ASK & PSK & QAM
Selects the type of Custom IQ.
Choices: 2-FSK | 4-FSK | 8-FSK | 16-FSK | MSK
Default: 2-FSK
Selects the FSK type.
Range: 0 - SymbolRate * 10 (Max 4GHz)
Default: 1MHz
Sets the FSK deviation reference.
Range: 1ksps - 4Gsps
Default: 1Msps
Sets the symbol rate of the FSK signal.
Choices: Gaussian | Root Nyquist | Nyquist | Rectangle | User Defined
Default: Rectangle
Selects the FSK filter type.
Range: 1 - 1000
Default: 32
Sets the length of the filter in symbols.
Range: 0.01 to 1.0
Default: 0.5
Sets the alpha factor of the Root Nyquist or Nyquist filter.
Range: 0.1 to 1.0
Default: 0.5
Sets the BT product of the Gaussian filter.
Choices: PN9 | PN15 | PN23 | Custom Bit Pattern | User File
Default: PN9
Opens the Data Setup editor to configure payload bits.You can also load, save, and create custom bit patterns.
Range: 100 - 100000
Default: 1000
Sets the length of the FSK symbols.
Range: 0 - 200ms
Default: 0us
Sets the idle interval in-between FSK frames in seconds. When the idle interval is set to zero, a continuous waveform will be generated.
Range: 0 - 20
Default: 0
Sets the number of ramp symbols for burst signal (Idle Interval is not zero).
Resets Frequency Deviation Value to default value in the table below.
Displays the FSK symbol.
Range: -FSK Deviation Reference - FSK Deviation Reference
Set the FSK deviation value for each FSK symbol.
Range: -100 - 100
Set the FSK deviation by percentage for each FSK symbol.
