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.
This button opens a menu where you can choose between a user-defined IQ or MATLAB waveform file.
|
1. Configuration |
2. Basic |
3. I/Q |
4. ALC |
|---|---|---|---|
|
5. Baseband |
6. Markers |
7. Triggers |
8. Real-time Noise Setup |
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: N5182B
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 Power 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: On | Off
Default: Off
Coupling: Only visible when the RF Signal Generator connected is N5182A/B MXG or N5172B EXG.
Double-click or use the drop-down menu to turn the internal channel correction 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.
Choice: Fixed | Modulated | RMS | Manual
Default: RMS
Double-click or use the drop-down menu to select one of the following reference signals when doing a power search.
– Power search uses a fixed 0.5 V reference.
– Power search uses the AC bias from the actual modulating signal.
– Power search uses a DC bias value equivalent to the value derived from the file header or the calculated value from the current I/Q data.
Manual – On MXG front panel, not on N7614C software user interface.
Set to to enable this parameter.
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.
Choice: Auto | Manual
Default: Auto
Set the modulation attenuation mode for the I/Q modulator to automatic or manual.
– the signal generator optimizes the modulation attenuation for the current conditions.
– applies the value set in the cell.
Range: 0 to 130 dB (minimum increment 0.01 )
Default: 6.00 dB
Use this parameter to reduce the signal level driving the I/Q modulation block. Adjusting the attenuation may reduce signal distortion and improve the overall dynamic range.
Set the Modulation Attenuation Mode to to enable this parameter.
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.
Choice: Continuous | Single | Gated | Segment Advance
Default: Continuous
Double-click or use the drop-down menu to select the triggering mode.
– selects the continuous triggering mode, which enables the signal generator to repeat the modulating signal indefinitely until you turn off the modulation format, change triggers, or select another waveform.
– sets up a waveform to play once after receiving a trigger.
– sets the signal generator to the gated trigger mode, which causes the waveform (modulating signal) to repeatedly start and stop in response to an externally applied trigger signal. To use the gated trigger mode, you must select as the Trigger Source.
– controls the way the signal generator plays segments within a sequence. This includes determining whether a segment plays once or continuously, and when the sequence advances to the next segment. See Segment Advance.
For Dual Band DPD test, this is read only by setting to default value.
Choice: Trigger Key | External | Bus
Default: External
Coupling: Trigger Source will be coupled to External if the Trigger Master setting in the Envelope Tracking block is set to Envelope Signal Generator, and will be coupled to Bus if the Trigger Master setting in the Envelope Tracking block is set to RF Signal Generator.
Double-click or use the drop-down menu to select the triggering method.
– selects the front panel hardkey as the trigger source. After making this selection, press the Trigger hardkey to trigger a waveform.
– causes a waveform to trigger from an externally supplied trigger signal.
– enables a command sent through the GPIB, LAN, or AUXILIARY IO (RS-232) input connector to trigger a waveform.
For Dual Band DPD test, this is read only by setting to default value.
Choice: Pattern Trigger In 1 | Pattern Trigger In 2
Default: Pattern Trigger In 1
Double-click or use the drop-down menu to select the rear-panel input for the external trigger signal. must be selected as the trigger source.
– selects the PATTERN TRIG IN rear-panel BNC connector
– selects the AUXILIARY I/O rear panel connector
Choice: Positive | Negative
Default: Positive
Coupling: This setting will be coupled to Positive if the Envelope Tracking Block is set to On and the Trigger Master is set to Envelope Signal Generator.
Sets the polarity of the external trigger. This parameter is active only if you select as the trigger source.
– the signal generator triggers an event when it receives a negative change in the signal at the PAT TRIG IN or AUX I/O rear panel connector.
– the signal generator triggers an event when it receives a positive change in the signal at the PAT TRIG IN or AUX I/O rear panel connector.
Choice: On | Off
Default: Off
Coupling: This setting will be coupled to On if the Trigger Master in the Envelope Tracking block is set to Envelope Signal Generator, and will be coupled to Off is the Trigger Master is set to RF Signal Generator.
Turns the external trigger delay off or on. This parameter is active only after selecting as the trigger source.
Range: 5 ns to 41 s
Default:1 ms
Coupling: If Envelope Tracking block is set to On and the Trigger Master in Envelope Tracking block is set to Envelope Signal Generator, this setting and the I/Q Delay setting in this block will be determined by the Delay value in the Envelope Tracking block.
Sets the amount of time to delay the signal generator's response to an external trigger, in 8 ns or 10 ns steps. The delay is a path (time) delay between the time the signal generator receives the trigger and when it responds to the trigger.
Choice: Free Run | Trigger & Run | Reset & Run
Default: Free Run
Coupling: This setting will be coupled to Trigger & Run if the Envelope Tracking block is set to On and the Trigger Master in the Envelope Tracking block is set to Envelope Signal Generator.
Double-click or use the drop-down menu to select the continuous mode and one of the following trigger responses.
– immediately triggers when you turn the format on.
– waits for and starts on the first trigger; ignores subsequent triggers.
– waits for and starts on the first trigger; resets and plays on a subsequent trigger.
For Dual Band DPD test, this is read only by setting to Trigger & Run.
Choice: Buffered Trigger | No Retrigger | Restart on Trigger
Default: Buffered Trigger
Double-click or use the drop-down menu to select the single mode and one of the following trigger responses.
– the waveform segment ignores triggers during playback
– causes a waveform to accept a trigger during playback and to restart after the current play finishes.
– causes a waveform to accept a trigger during playback and to restart immediately after receiving a trigger.
Choice: Single | Continuous
Default: Continuous
Double-click or use the drop-down menu to select the segment advance mode and one of the following trigger responses.
– causes a segment to play once and to wait for a trigger before the sequence advances to the next segment.
– causes a segment to play continuously until receiving another trigger. Upon receiving the trigger, the sequence advances to the next segment, which then plays continuously.
Choice: Active High | Active Low
Default: Active High
Double-click or use the drop-down menu to select the gated mode and one of the following trigger responses. To use the gated trigger mode, you must also select .
– causes waveform playback to start when the trigger signal goes low and to stop when the trigger signal goes high.
– causes waveform playback to start when the trigger signal goes high and to stop when the trigger signal goes low.
Choice: On | Off
Default: Off
Double-click or use the drop-down menu to enable or disable adding real-time, non-repeating additive white Gaussian noise (AWGN) to the carrier being modulated by the waveform being played.
– enables the addition Real-time Noise.
– disables the addition of Real-time Noise.
Range: -100 to 100 dB
Default: 0 dB
Enter the noise power to be applied to a waveform. The carrier power is defined as the total modulated signal power before noise power is added. When you add noise, the power output from the signal generator does not change; it is the sum of carrier power and the added noise power. A positive value makes C larger than N.
Range: 1 Hz to 200 MHz
Default: 1.0 Hz
Specify the bandwidth over which the noise power is integrated for calculating the carrier to noise ratio (the bandwidth of the target carrier). Also, the maximum upper range is limited to Base Sampling Rate x OSR before download is finished.
Range: 1 Hz to 200.000 MHz
Default: 1.000 Hz
Set or change the noise bandwidth.
This parameter is available only when the RF Signal Generator connected is N5172B EXG, N5182A/B MXG.
Range: 1 to 2
Default: 1
Displays the flat noise bandwidth factor for the applied real-time noise.
When the Sample Clock is < 50 MHz, the Noise Bandwidth Factor adjusts the RF flat noise bandwidth to be either at least 0.8 times the sample rate for a bandwidth factor of 1, or 1.6 times the sample rate if the bandwidth factor is 2.
When the Sample Clock is > 50 MHz, noise cannot be enabled if the Noise Bandwidth Factor is 2. Any oversampling in a waveform will effectively make the noise bandwidth that many times wider than the signal bandwidth.
The Noise Bandwidth is calculated as follows:
The noise bandwidth is at least 0.8 * [ARB Sample Clock] * [Noise Bandwidth Factor]
This parameter is available only when the RF Signal Generator connected is E4438C ESG