NI pxie-5840 features功能指南使用手册.pdf

2023-03-01PXIe-5840 FeaturesPXIe-5840 FeaturesContentsPXIe-5840.4PXIe-5840 Front Panel and LEDs.4PFI 0 Connector Using NI-RFSA and NI-RFSG.7PXIe-5840 Block Diagram.7RF Input Subsystem.8RF Output Subsystem.11FPGA Basecard Subsystem.14LO Path.24Synchronization Using NI-RFSA and NI-RFSG.25Associating the PXIe-5840 and PXIe-5653 Modules.26Associating Devices in MAX.27Calibrating the Devices.28Other Considerations.28Peer-to-Peer Data Streaming.29Configuring a Peer-to-Peer Endpoint.29Configuring a Peer-to-Peer Endpoint with NI-RFSG.30Configuring a Peer-to-Peer Endpoint with NI-RFSA.30Configuring a Peer-to-Peer Stream.31Configuring Flow Control.31Starting Peer-to-Peer Generation.31Stopping Peer-to-Peer Generation.33Stopping Peer-to-Peer Acquisition.34Device Warm-Up.34Power On,Reset,and Download Conditions.34Advanced Topics.35Spurious Performance.35RF Path Transitions.36Frequency Offset.40Local Oscillators.42Interconnecting Multiple PXIe-5840 RF Channels(Homogeneous ChannelTypes).44Quadrature Mixing(Direct Conversion).47Configuring Attenuator Hold.49/PXIe-5840 FeaturesDe-embedding Overview.49S-parameters.50Scalar De-embedding.52Frequency and Bandwidth Configuration.52Calibration.64Self-Calibration.64NI-TClk Manual Calibration Using NI-RFSA.68NI-TClk Manual Calibration Using NI-RFSG.69Unsupported NI-RFSG Features.70 National InstrumentsPXIe-5840 FeaturesPXIe-58406 GHz,1 GHz Bandwidth,RF PXI Vector Signal Transceiver 9 kHz to 6 GHz frequency range Up to 1 GHz of instantaneous bandwidthPXIe-5840 Front Panel and LEDsFront Panel and LEDs7 NATIONAL产 INSTRUMENTSNl PXIe-5840Vect or Sig nal Transceiver9 kHz-6 GHz,1 GHz BWooACCESS ACTIVEREF INPFIO SENSITIVE=中RFOUTReverse Power+33 dBm MAXREFOUTLO IN+15 dBm MAXLO OUTJLOIN+15 dBm MAXLO OUTRF IN+33 dBm MAXJ4 PXIe-5840 FeaturesTable 1.General Connector DescriptionsConnectorUseConnector TypeREFINInput terminal that allows for the use of an external 10 MHz Reference Clock.MMPX(f)REF OUTOutput terminal that can export a 10 MHz Reference Clock orthe 156.25 MHz Data Clock.MMPX(f)PFIOProgrammable-function digital I/O(DIO)connector for use with triggers or events.MMPX(f)DIOMulti-signal DIO connector that provides access to FPGA multi-gigabit transceivers(MGTs)and general purpose LVCMOS signals.Nano-PitchNotice The DIO connector is not an OCuLink interface.Do not connect the DIO connector on the PXIe-5840 to the OCuLink interface of another device.Nl is not liable for any damage resulting from such signal connections.ConnectorUseConnector TypeRFOUT RFOUTOutput terminal for RF signals.SMA(f)LOINInput terminal that allows for the use of an external local oscillator(LO)for RF OUT.MMPX(f)LOOUTOutput terminal for exporting the RF OUT LO source.MMPX(f)National InstrumentsPXIe-5840 FeaturesTable 3.RF Connector DescriptionsConnectorUseConnector TypeRFIN LOINInput terminal that allows the use of an external LO for RF IN.MMPX(f)LOOUTOutput terminal for exporting the RF IN LO source.MMPX(f)RFOUTInput terminal for RF signals.SMA(f)OffThe device is idle.LEDIndicationsACCESSIndicates the basic hardware status of the device.OffThe device is not yet functional or has detected a problem with a PXI Express power rail.AmberThe device is being accessed.Accessed means that you are writing to the device setup registers to control the device,reading from the device to monitor the device status,or transferring data to/from the device.GreenThe device is controllable through the software.ACTIVESolid greenThe device is generating a waveform.Dim amberThe device is waiting for an acquisition Reference Trigger.Solid amberThe device is acquiring a waveform.Solid redThe device has detected an error.The LED remains red until the error condition is removed.Not The indicators are listed in increasing order of priority.For6 PXIe-5840 FeaturesTable 3.LED IndicatorsLEDIndicationsexample,if you are generating a waveform using NI-RFSG and waiting on an acquisition Reference Trigger in NI-RFSA,the LED is dim amber.DIO Connector PinoutReservedGNDMGT Rx+0MGT Rx-0GNDMGT Rx+1MGT Rx-1GNDDIO 4DIO 5GNDMGTREF+/DIOOMGT REF-/DIO 1GNDMGT Rx+2MGT Rx-2GNDMGT Rx+3MGT Rx-3GND5.0 V/AlBl5.0 VA2B2GNDA3B3MGT Tx+0A4B4MGT Tx-0A5B5GNDA6B6MGT Tx+1A7B7MGT Tx-1A8B8GNDA9B9DIO 6A10BIODIO 7AllBllGNDA12B12DIO 2A13B13DIO 3A14B14GNDA15B15MGTTx+2A16B16MGTTx-2A17B17GNDA18B18MGTTx+3A19B19MGTTx-3A20B20GNDA21B21ReservedPFI 0 Connector Using NI-RFSA and NI-RFSGPFI 0 is a bidirectional connector.When programming the PXIe-5840 using NI-RFSA or NI-RFSG,the PFI 0 terminal can accept a trigger from an external source or export an eventortrigger.Refer to the PXIe-5840 Specifications document for information about acceptable input signal characteristics for the PFI 0 line and output signal characteristics.PXIe-5840 Block Diagram National InstrumentsPXIe-5840 FeaturesThe PXIe-5840 has the RF Input,RF Output,FPGA Basecard,and LO Path subsystems.REF OUTRFOUTRF INPFIODIOREF IN/Note Some calibration-related routing paths and front panel connectors have been omitted from the illustration of the high-level block diagram for simplicity.Related concepts:RF Input Subsystem RF Output Subsystem FPGA Basecard Subsystem LO PathRF Input SubsystemThe PXIe-5840 has two configurable RF paths comprised of an independent vector signal analyzer(RF input)path and vector signal generator(RF output)path.The following high-level block diagram represents the PXIe-5840 RF input path.8 PXIe-5840 FeaturesBands Select Filter Bands:120-165 MHz 13-1.6GHZ165-240 MHz 1.622 GHz240-310 MHz 22-2.7 GHz310-410 MHz 2.7-3 4 GHz41050 MHz 3.4-4 5 GHz650-920 MHz 4.5-6 0 GHz092-1.3 GHzThe PXIe-5840 RF input path is AC coupled and covers a frequency range of 9 kHz to 6,000 MHz center frequency.For frequencies below 120 MHz(low frequency),RF input signals are directly sampled via analog-to-digital conversion.Frequencies greater than 120 MHz(high frequency)are translated to baseband via a single stage direct conversion(l/Q)down converter,allowing for wide instantaneous bandwidth.High Frequency RF Input PathThe high frequency subsystem of the RF input path consists of a programmable and filtered front end that feeds into a direct conversion downconverter.Once at baseband frequencies,the signal is sampled with an analog-to-digital converter(ADC)capable of up to 1,000 MHz of complex equalized bandwidth.RF attenuation greater than 70 dB can be nominally configured through the combination of switchable attenuation and programmable step attenuators.RF attenuation is automatically chosen in conjunction with amplification stages to provide optimal reference levels over the support range of the device.A switchable pre-amplifier is also configurable in the front end of the device to further optimize the signal path for noise figure.This pre-amplifier can be configured for bypass,forced inline,or automatically configured based on application needs.The configurable range of reference levels may vary based on which option is selected for the pre-amplifier.Low Frequency RF Input PathThe low frequency subsystem of the RF input path is used to directly sample RF input signals below 120 MHz.The RF input signal is provided via a frequency selective diplexer to programmable gain components before being filtered and sampled with an analog-to-digital converter.National InstrumentsPXIe-5840 FeaturesThe programmable gain elements at low frequency consist of a switchable amplifier and a programmable attenuator.When disabled,the switched amplifier is bypassed by a 10 dB attenuator.The programmable attenuator is capable of 31 dB attenuation in 1 dB steps.Refer to the RF Path Transitions topic for more information on using the low frequency RF input path.Cal In PathThe RF input subsystem has internal calibration capability in both the high frequency and low frequency paths.Cal In is used in conjunction with Cal Out from the RF Output subsystem to facilitate steps within the following Vis or functions:NI-RFSA Self-Calibrate VI or niRFSA_SelfCalibrate NI-RFSG Self-Calibrate VI or niRFSG_SelfCal NI-RFSA Self-Calibrate Range VI or niRFSA_SelfCalibrateRange NI-RFSG Self-Calibrate Range VI or niRFSG_SelfCalibrateRangeRelated concepts:RF Path Transitions RF IN Signal Gain and Attenuation Quadrature Mixing(Direct Conversion)Related information:NI-RFSA Programming Reference NI-RFSG Programming ReferenceRF Input Signal PathThe RF source signal takes the following path from the PXIe-5840 front panel to the PXI Express controller.1.The RF signal is connected to the PXIe-5840RF IN front panel connector.2.The RF signal is passed through the frequency-selective path of the front end diplexer to either the high frequency or low frequency path.10 PXIe-5840 Features3.The signal is amplified or attenuated based on the reference level to the required mixer level,based on available gain in the selected RF path.The amplification and attenuation maintain optimized dynamic range and avoid signal saturation or ADC overflow.4.The RF signal is frequency-translated based on the signal path used:When in the high frequency path,the attenuated or amplified signal is mixed with a 0 phase and 90 phase LO signal at the tuned center frequency,translating the resulting signal into a pair of I and Q signals 90 out-of-phase from each other.These I and Q signals are then conditioned and sampled by an ADC converter.When in the low frequency path,the attenuated or amplified signal is directly passed to signal conditioning and the ADC without frequency translation.5.The translated signal is sampled by the ADC at 1,250 MS/s.The resulting signals are accessible through LabVIEW FPGA I/O nodes for further processing or transfer to the host computer.RF IN Signal Gain and AttenuationThe RF IN signal path chooses gain and attenuation settings based on the requested reference level.The gain definition measured in calibration is adjusted and applied according to the following equation:RF Input Gain(dB)二 Complex PowerADC(dB)-Real PowerRF 州 TerminalfdB)The resulting gain scales the acquired data to reference back to the RF IN front panel connector.The reported gain scales both I and Q evenly.If you compute power by reading l/Q data and running a power spectrum or Fast Fourier Transform(FFT),scale the gain by a gain compensation value of 0.5 or reduce the power result by 3 dB.If you use Spectrum Mode,NI-RFSA scales the power for you.RF Output SubsystemThe PXIe-5840 has two configurable RF paths comprised of an independent vector signal analyzer(RF input)path and vector signal generator(RF output)path.The following high-level block diagram represents the PXIe-5840 RF output path.National InstrumentsPXIe-5840 FeaturesBands Select Filter Bands：120-165 MHz 1.3-1.6 GHz 165-240 MHz 1.6-2.2 GHz 240-310 MHz 22-2.7 GHz 310-410 MHz 2734 GHz 410-650 MHz 3 4-4.5 GHz 650-920 MHz 4 5-6.0 GHz 0.92-1.3 GHzThe PXIe-5840 RF output path is AC coupled and covers a frequency range of 9 kHz to 6,000 MHz center frequency.For frequencies below 120 MHz(low frequency),RF output signals are directly generated via digital-to-analog(DAC)conversion.Frequencies greater than 120 MHz(high frequency)are translated from baseband I and Q signals to the specified RF frequency via a single stage direct conversion(l/Q)upeonverter,allowing for a wide instantaneous bandwidth.High Frequency RF Output PathThe high frequency subsystem of the RF output path consists of a wideband direct conversion upconverter and a front end signal path with programmable RF filtering and gain stages.I and Q baseband signals generated by the DAC are mixed and combined to create an RF signal with up to 1,000 MHz of complex equalized bandwidth centered at the specified RF center frequency.This signal can then be conditioned for both bandwidth and level.Greater than 80 dB of RF attenuation can be configured nominally through the combination of switchable fixed attenuation and programmable step attenuators.RF attenuation is automatically chosen in conjunction with amplification to provide optimal reference levels over the support range of the device.There are two switchable amplifiers and one switchable high power amplifier.The switchable high power amplifier is used for generating signals significantly larger than 0 dBm.This amplification stage is automatically selected based on output power level setting and extends the available peak power range to+20 dBm,calibrated.Additional power may be achieved above+20 dBm,however it is not guaranteed to meet absolute or relative accuracy specifications.上 PXIe-5840 FeaturesLow Frequency RF Output PathThe low frequency subsystem of the RF output path is used to directly generate the requested RF output signals below 120 MHz from the DAC.The RF signal is generated from the DAC through programmable gain stages and transmitted from the RF OUT front panel connector through a frequency selective diplexer.This allows for a seamless transition from low frequency to high frequency paths.Refer to the RF Path Transitions topic for more information about using the low frequency path.The low frequency path programmable gain stages consist of a 31 dB step attenuator with 1 dB resolution and a switchable amplification stage.The off state of the switchable amplifier has additional fixed attenuation integrated into it.This provides a nominal gain range of+5 dB to-40 dB.Additional attenuation is possible with the DAC full scale configuration settings as well as digital waveform scaling.Note Nl recommends external attenuation for applications requiring a significant amount of analog attenuation when using the low frequency RF output path.Related concepts:Quadrature Mixing(Direct Conversion)RF Path TransitionsRF Output Signal PathThe RF output signal takes the following path from the PXIe-5840 FPGA to the RF OUT front panel connector.1.The I and Q digital signals are sent to the baseband digital-to-analog(DAC)converter through a LabVIEW FPGA I/O node after being written from the host.2.The DAC converts the digital I and Q waveforms into analog I and Q signals at 1,250 MS/s.Internal to the DAC,the output is two times interpolated to 2,500 MS/s.3.Based on the specified center frequency,the analog I and Q signals are conditioned and passed either to the direct conversion modulator high National InstrumentsPXIe-5840 Featuresfrequency path,or sent directly to the low frequency path for additional level control.4.Depending on the selection of high frequency path or low frequency path,the converted RF frequency is further attenuated or amplified based on the specified output power settings.5.The conditioned RF output signal is transmitted from the PXIe-5840RF OUT front panel connector through a frequency selective diplexer stage.Using the PXIe-5840 in CW ModeYou can use the PXIe-5840 as a continuous waveform(CW)generator when programming the PXIe-5840 using NI-RFSG.To generate a CW signal,use the niRFSG Configure Generation Mode VI orthe niRFSG_ConfigureGenerationMode function.Related concepts:Average Power and Crest Factor ConsiderationsRelated inform