This button connects to the instrument after entering the its Address in the Configuration property grid. It also displays the following status conditions:
Idle: No instrument is connected.
Connecting: The software is in the process of connecting to the instrument.
Connected: The software is connected to the instrument.
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1. Configuration |
2. Basic |
3. I/Q |
4. ALC |
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5. Baseband |
6. Markers |
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Enter the instrument address.
The drop down list of Address lists the recently used instrument address and the connection strings (GPIB, USB, LAN, etc.) configured in the IO Connection Expert.
Default: M9381A
This parameter displays the model number and serial number of the instrument if the status of Instrument Connection Button is Connected.
Choice: On | Off
Default: Off
Double-click or use the drop-down menu to enable or disable the DC calibration after the waveform download.
Range: for frequency range values, see the signal generator's data sheet
Default: 1 GHz
Enter a value to set the signal generator’s output frequency. Use abbreviations for faster entry (example: 1g = 1.000000000000 GHz).
Range: for amplitude range values, see the signal generator's data sheet
Default: -10 dBm
Enter a value to set the signal generator’s output amplitude in dBm.
If the PA Mode in PA block is set to PA input, the Amplitude value here in RF Signal Generator Block is coupled with the Power and Loss In setting in PA block as follows:
If the Power or Loss In value in PA block is changed, the Amplitude value here will be changed to (PA Power + Loss In).
If the Amplitude value here is changed, the PA Power value in PA block will be changed to (Amplitude - Loss In).
If the PA Mode in PA block is set to PA output, the Amplitude value is coupled with the settings under PA block, which is (PA Power + Loss In -Gain).
Choice: Off | On
Default: On
Double-click or use the drop-down menu to turn the signal generator’s RF output or .
Choice: Off | On
Default: Off
Double-click or use the drop-down menu to turn the I/Q adjustments or .
– The values entered for I Offset, Q Offset, and so on are applied to the I and Q signals.
– I/Q adjustment values are not applied to the I and Q signals.
Range: -20% to 20%
Default: 0.0%
Enter a DC offset value to apply to the I signal before the I/Q modulator. Use this offset to remove imperfections in the in-phase signal or to introduce calibrated impairments. For more information, refer to the User Guide or Key Reference for the signal generator you are using.
Set to to enable this parameter.
Range: -20% to 20%
Default: 0.0%
Enter a DC offset value to apply to the Q signal before the I/Q modulator. Use this offset to remove imperfections in the quadrature-phase signal or to introduce calibrated impairments. For more information, refer to the User Guide or Key Reference for the signal generator you are using.
Set to to enable this parameter.
Range:-1 dB to 1 dB in 0.001 dB steps
Default: 0.00 dB
Enter a value to set the gain for the I signal relative to the Q signal.
Example: If you enter a value of 1 dB, the I signal will have 1 dB more amplitude than the Q signal.
Set to to enable this parameter.
Range: -10 to 10 degrees
Default: 0 degrees
Enter a value to adjust the Q phase angle. When the quadrature skew is zero, the phase angle between the I and Q vectors is 90 degrees. Positive skew increases the angle from 90 degrees; negative skew decreases the angle from 90 degrees.
Set to to enable this parameter.
Range: -800 ns to 800 ns
Default: 0.0 ns
Changes the absolute phase of both the I and Q signals with respect to triggers and markers. Positive values add delay and negative values advance the signals. This value affects both the baseband signal modulated onto the RF and the external output signals (I and Q). This setting cannot be used with constant envelope modulation and it does not affect external I and Q inputs.
Range: -1.0 to 1.0 seconds, 1 ps step
Default: 0.0 ps
Enter a value to change the absolute phase of both I and Q with respect to triggers and markers. A positive value delays I and Q. This value affects both the external I/Q out signals and the baseband signal modulated on the RF output. This adjustment cannot be used with constant envelope modulation and does not affect external I/Q inputs.
The limits are determined by the rate of the current format.
Choice: Off | On
Default: On
Double-click or use the drop-down menu to enable or disable the automatic level control.
– The ALC circuit constantly monitors and controls the output power level.
– No automatic leveling occurs.
Range: 1 to 100% (100% = no scaling)
Default: 70%
Enter a scaling value for the signal generator to apply to the waveform while it is playing. Use scaling to get the best dynamic range without overflowing the I and Q digital-to-analog converters (DAC) and to reduce the overshoot associated with the DAC interpolation filter. Waveform Runtime Scaling does not change the data in the waveform file.
Range: for sample clock values, see the signal generator's data sheet
Default: 5 MHz
The sample clock rate of the instrument is automatically calculated by the software, which is the product of the Sample Rate and Resampling Ratio in Waveform block.
This parameter is read-only and displays the marker used for RF blanking. Pulse/RF Blanking turns off the RF output signal during specific conditions determined by the marker.
RF blanking incorporates ALC hold, so you do not need to select ALC hold when using RF blanking.
Do not blank longer than 100 ms to avoid exceeding the ALC hold limit.
This parameter is read-only and displays the marker for ALC hold. ALC hold is used when you have a waveform signal that has idle periods, or when the increased dynamic range with RF blanking is not desired.
RF blanking incorporates ALC hold, so there is no need to select ALC hold when using RF blanking.
Limit ALC Hold to no more than 100 ms, as the ALC Level may degrade.
The hold selection remains until you reconfigure it, preset the signal generator, or cycle the signal generator power.
Incorrect ALC settings can cause a sudden unleveled condition to occur. An unleveled RF output can damage a DUT or connected instrument. Ensure that you set markers such that the ALC obtains a sample that accounts for the high power levels within the signal.