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.
|
1. Configuration |
2. Basic |
3. I/Q |
4. ALC |
|---|---|---|---|
|
5. Baseband |
6. Markers |
7. Triggers | |
Enter the instrument address. When Address is changed, the connected state will be changed to Idle.
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: M9383A
This parameter displays the model number and serial number of the instrument if the status of Instrument Connection Button is Connected.
Choice: Off | On
Default: Off
Turns the I/Q DC alignment on or off.
Choice: 1 | 2
Default: 1
Sets or displays the active channel of the M9384B VXG and is coupled with the instrument.
Range: 1 MHz to VXG's maximum frequency (varies depending on VXG hardware configuration)
Default: 1 GHz
Coupling: The value should not be less than the waveform sample rate.
Enter a value to set the RF carrier frequency. Use abbreviations for faster entry (example: 1g = 1.000000000000 GHz).
Range: -120 dBm to 23 dBm (varies depending on VXG hardware configuration)
Default: -10 dBm
Enter a value to set the RF amplitude.
Choice: Off | On
Default: On
Double-click or use the drop-down menu to turn the signal generator’s RF output On or Off.
Choice: Off | On
Default: Off
Double-click or use the drop-down menu to turn the internal channel correction off or on.
Choice: Off | On
Default: Off
Double-click or use the drop-down menu to turn the I/Q adjustments On or Off.
On – The values entered for I Offset, Q Offset, and so on are applied to the I and Q signals.
Off – I/Q adjustment values are not applied to the I and Q signals.
Range: -20% to 20%
Default: 0.0%
Coupling: Available when I/Q Adjustments is enabled.
Sets the origin offset for the internally generated in-phase signal.
Set I/Q Adjustments to On to enable this parameter.
Range: -20% to 20%
Default: 0.0%
Coupling: Available when I/Q Adjustments is enabled.
Sets the origin offset for standard quadrature-phase signal.
Set I/Q Adjustments to On to enable this parameter.
Range:-10 dB to 10 dB in 0.001 dB steps
Default: 0.00 dB
Coupling: Available when I/Q Adjustments is enabled.
Adjusts the ratio of I to Q while preserving the composite vector magnitude.
Example: If you enter a value of 1 dB, the I signal will have 1 dB more amplitude than the Q signal.
Set I/Q Adjustments to On to enable this parameter.
Range: -20 to 20 degrees
Default: 0 degrees
Coupling: Available when I/Q Adjustments is enabled.
Adjusts the phase angle between I and Q vectors
Set I/Q Adjustments to On to enable this parameter.
Range: -19.5 ns to 19.5 ns
Default: 0.0 ns
Coupling: Available when I/Q Adjustments is enabled.
Sets the I/Q skew value, which is a time delay between I and Q.
A positive value delays the I signal relative to the Q signal.
A negative value delays the Q signal relative to the I signal.
Range: 0 s to 1.589609 µs
Default: 0 s
Coupling: Available when I/Q Adjustments is enabled.
Changes the absolute phase of both I and Q with respect to triggers and markers. A positive value delays I and Q.
Choice: Off | On
Default: On
Filters the system RF flatness correction coefficients over the instantaneous bandwidth indicated in the waveform header (or in the “Occupied Bandwidth” settings area under the Signal block > Occupied Bandwidth setting, when Waveform File is the Vector Modulation Signal Mode). This has the potential to improve EVM performance by not having to correct for flatness errors outside the requested bandwidth. For example, if RF flatness correction was done at 2 GHz, but you are only interested in an 800 MHz section, then applying the correction flatness to that portion only can improve signal to noise ratio, and therefore EVM when there is a lot of hardware roll off.
Choice: Off | On
Default: On
Enables or disables ALC On and ALC Bandwidth couplings. Setting ALC On, ALC Bandwidth, or ALC Hold Mode turns this parameter off. For IQ modulation the ALC & Power Search should always be set to Auto.
Choice: Off | On
Default: On
Double-click or use the drop-down menu to enable or disable the automatic level control.
On – The ALC circuit constantly monitors and controls the output power level.
Off – No automatic leveling occurs.
Choice: VerySlow | Slow | Medium | Fast
Default: Very Slow
Double-click or use the drop-down menu to select the ALC loop bandwidth. Choose Auto to let the signal generator automatically select the optimized bandwidth for the current signal setup.
Choice: Off | On
Default: On
Toggles Power Search Mode On or Off. When enabled, power search calibration routine is executed whenever an instrument setting is modified that affects RF output power. This includes changes to frequency, amplitude and modulation. For IQ modulation the ALC & Power Search should always be set to Auto.
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. Runtime Scaling does not change the data in the waveform file.
Range: 1 Hz to 2.56 MHz (varies depending on VXG hardware configuration)
Default: 5 MHz
Coupling: The value is coupled by the waveform sample rate and oversampling ratio.
Sets the Sample Clock rate.
Choice: None | Marker1 | Marker2 | Marker3 | Marker4
Default: Marker4
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.
Choice: None | Marker1 | Marker2 | Marker3 | Marker4
Default: Marker3
This parameter is read-only and selects a marker to enable the automatic leveling control (ALC) hold function, or select None to disable the hold feature. 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.
Choice: Continuous | Single
Default : Continuous
Selects the ARB trigger type.
Choice: External | Bus | Trigger Key | Immediate
Default: Bus
Adjusts the trigger source applied to the PATT TRIG IN or AUX I/O connectors.
Trigger Key − selects the front panel hardkey as the trigger source. After making this selection, press the Trigger hardkey to trigger a waveform.
External − enables you to trigger a waveform with an externally supplied trigger signal.
Immediate − enables immediate triggering of the waveform playing (only for VXG).
Bus − enables you to trigger a waveform by sending a command through the GPIB, LAN, or AUXILIARY IO (RS-232) input connector.
Choice: High | Normal
Default: High
Sets how the trigger line should be terminated in the hardware.
Choice: Positive | Negative
Default: Negative
Sets the polarity of the external trigger. This parameter is active only if you select external (Ext) as the trigger source.
Positive − the signal generator triggers an event when it detects a rising edge on the PAT TRIG IN signal.
Negative − the signal generator triggers an event when it detects a falling edge on the PAT TRIG IN signal.
Range: 8 ns to 30 s
Default: 0
Sets a delay time between when an external trigger is received and when it is applied to the waveform.
Range: -4 ns to 10 s
Default: 0 s
Sets the amount of time in seconds to hold off until the next trigger.
Range: -3.50 V to 3.50 V
Default: 500 mV
Specifies the threshold level in volts at which the trigger transitions states.