Description
NI PXIe-5698 Product Description
Detailed parameter table
| Parameter name | Parameter value |
| Product model | PXIe-5698 |
| Manufacturer | National Instruments |
| Product category | PXI Express microwave signal generator |
| Frequency range | 10 MHz to 26.5 GHz |
| Output power range | -140 dBm to +20 dBm (typical) |
| Frequency resolution | 0.01 Hz |
| Frequency accuracy | ±(0.005 ppm + 1 Hz) at 25 °C |
| Phase noise | -118 dBc/Hz at 1 GHz carrier, 10 kHz offset (typical) |
| Spurious emissions | ≤-60 dBc (typical, 10 MHz to 26.5 GHz) |
| Modulation types | AM, FM, PM, pulse, IQ (vector) modulation |
| IQ modulation bandwidth | 500 MHz (typical) |
| Interface | PXI Express (x4 Gen 3) |
| Connector type | 2.4 mm female (RF output), 1 SMA (trigger I/O), 1 26-pin D-sub (digital I/O) |
| Operating temperature | 0 °C to 55 °C |
| Storage temperature | -40 °C to 70 °C |
| Physical dimensions | 6.3 x 3.9 inches (160 x 100 mm) |
| Power consumption | 150 W (maximum) |
| Compliance standards | CE, UL, CSA, FCC Part 15 Class A |
NI PXIE-5698
Product introduction
The National Instruments PXIe-5698 is a high-performance microwave signal generator designed for PXI Express systems, delivering exceptional signal purity and wide frequency coverage for advanced RF and microwave test applications. As a key member of NI’s RF vector signal generator family, it combines cutting-edge microwave technology with the modular flexibility of PXIe, making it ideal for aerospace, defense, and wireless communication testing.
The PXIe-5698 integrates seamlessly into automated test environments, leveraging the high-speed PXIe x4 Gen 3 interface for rapid waveform downloads and synchronization with other instruments like spectrum analyzers and vector network analyzers. Its 10 MHz to 26.5 GHz frequency range covers key bands including 5G FR2, satellite communications, and radar systems, while supporting a comprehensive set of modulation formats—from basic AM/FM to complex IQ modulation with 500 MHz bandwidth. With superior phase noise and low spurious emissions, the PXIe-5698 enables accurate testing of high-sensitivity receivers and advanced radar components.
Core advantages and technical highlights
Wide frequency coverage with signal purity
The NI PXIe-5698 spans 10 MHz to 26.5 GHz, addressing the needs of microwave test applications from legacy systems to emerging 5G FR2 (mmWave precursor) standards. Its exceptional phase noise performance (-118 dBc/Hz at 1 GHz, 10 kHz offset) ensures minimal interference when testing sensitive receivers, while spurious emissions ≤-60 dBc prevent false signals from corrupting measurements. This combination of range and purity is critical for radar cross-section testing and satellite transponder validation.
High-speed IQ modulation
With 500 MHz IQ modulation bandwidth, the PXIe-5698 generates complex waveforms such as 5G NR, LTE-A, and custom radar pulses with precise timing. The x4 Gen 3 PXIe interface enables waveform download speeds exceeding 8 GB/s, reducing setup time for long, high-resolution test sequences. This capability is essential for validating 5G base stations and user equipment, where accurate replication of real-world signal conditions is required.
Advanced synchronization
The PXIe-5698 leverages PXIe trigger lines and NI’s 10 MHz reference clock distribution to synchronize with other RF instruments, achieving phase coherence across multiple generators. This is vital for MIMO (multiple-input multiple-output) testing, where precise phase relationships between signals are critical to evaluating antenna array performance. The module also supports external 10 MHz reference input for system-level calibration, ensuring frequency alignment with large test setups.
Flexible modulation capabilities
Beyond standard AM/FM/PM, the PXIe-5698 offers pulse modulation with 10 ns rise/fall times and arbitrary waveform generation for custom signal scenarios. Its IQ modulation supports up to 16-bit resolution, enabling the creation of complex signals with high dynamic range—ideal for testing electronic warfare systems or simulating radar jamming environments. The integrated digital I/O allows for external control of modulation triggers, enhancing integration with external test hardware.
Typical application scenarios
In aerospace and defense, the NI PXIe-5698 is used to test radar systems by generating simulated target signals across 10 MHz to 26.5 GHz. Its low phase noise ensures accurate measurement of radar receiver sensitivity, while pulse modulation capabilities replicate the time-domain characteristics of real-world radar pulses. For electronic warfare testing, it generates jamming signals with complex modulation patterns, enabling evaluation of system resilience to interference.
In 5G FR2 development, the PXIe-5698 generates 28 GHz and 39 GHz 5G NR signals to validate mmWave transceivers. Its 500 MHz IQ bandwidth supports the wide channel bandwidths required for high-data-rate 5G communications, while precise frequency control ensures compliance with 3GPP standards. The module’s ability to synchronize with multiple PXIe-5698 units enables MIMO testing of 5G base stations with 4×4 or 8×8 antenna configurations.
In satellite communication testing, the PXIe-5698 simulates uplink and downlink signals in the Ku, K, and Ka bands (12 GHz to 26.5 GHz). Its exceptional frequency accuracy (±0.005 ppm) ensures alignment with satellite transponders, while low spurious emissions prevent interference with sensitive receiver measurements. This makes it suitable for validating satellite modems and earth station equipment.
NI PXIE-5698
Related model recommendations
PXIe-5668 : A 50 GHz vector signal analyzer that pairs with the PXIe-5698 to create a complete RF test solution, enabling generation and analysis of signals up to 26.5 GHz for transceiver testing.
PXIe-5654 : A 6 GHz vector signal generator that complements the PXIe-5698 in mixed-frequency setups, handling sub-6 GHz bands while the PXIe-5698 covers microwave frequencies.
PXIe-6674T : A timing and synchronization module that enhances the PXIe-5698’s capabilities by distributing a 10 MHz reference clock and triggers across multiple instruments, ensuring phase coherence in MIMO systems.
PXIe-1085 : An 18-slot PXIe chassis that houses the PXIe-5698 and supporting instruments, providing the high-power and bandwidth needed for complex microwave test systems.
LabVIEW RF Vector Signal Generator Toolkit : Software that simplifies programming the PXIe-5698, offering pre-built functions for generating standard wireless signals (5G, LTE) and custom waveforms.
PXIe-5622 : A 26.5 GHz downconverter that extends the PXIe-5698’s utility in receiver testing by converting high-frequency signals to intermediate frequencies for detailed analysis.
Installation, commissioning and maintenance instructions
Installation preparation
Before installing the NI PXIe-5698, ensure the PXIe chassis is powered off and grounded. Use an anti-static wristband to handle the module, avoiding contact with the 2.4 mm RF connector pins. Verify the chassis has an available x4 Gen 3 slot and can supply 150 W of power. Use high-quality 2.4 mm coaxial cables rated for 26.5 GHz to connect the RF output to the device under test (DUT). Mount the module in the chassis, secure with front-panel screws, and connect trigger/SMB cables for synchronization. Install NI-RFmx driver software and run the calibration utility to verify output power and frequency accuracy before first use.
Maintenance suggestions
Inspect the 2.4 mm RF connector quarterly for damage or contamination; clean with compressed air and a lint-free cloth if needed. Avoid over-tightening connectors (torque to 8 in-lbs/0.9 Nm) to prevent thread damage. Calibrate the PXIe-5698 annually using NI’s ISO 17025-accredited service to maintain frequency accuracy and power output specifications—critical for regulated industries like aerospace. Monitor phase noise and spurious emissions via NI’s RFmx software; sudden degradation may indicate a need for service. Store the module in a dry environment (-40 °C to 70 °C) when not in use, and cover the RF connector with a dust cap to prevent contamination.
Service and guarantee commitment
The NI PXIe-5698 is backed by a 3-year standard warranty, covering defects in materials and workmanship. NI’s global technical support team provides 24/7 assistance for installation, programming, and troubleshooting via phone, email, and online resources, including application notes and example code for 5G and radar testing.
NI offers comprehensive calibration services, including on-site and factory options, to ensure the PXIe-5698 meets original performance specifications. For custom test requirements, NI’s professional services team can develop tailored waveform generation solutions and system integration support. With a mean time between failures (MTBF) exceeding 150,000 hours, the PXIe-5698 is engineered for reliable operation in demanding test environments, supported by NI’s long-term commitment to product lifecycle management.
