PXIe-4464 Sound and Vibration Input Module
The PXIe-4464 is a four-channel, 24-bit PXI sound and vibration module designed for high-accuracy dynamic signal acquisition. It provides simultaneous sampling, six input gain ranges, integrated IEPE sensor excitation and TEDS smart sensor support.
Each analog input channel can acquire data at rates up to 204.8 kS/s, with an alias-free bandwidth of approximately 92.9 kHz. A dynamic range of up to 119 dB allows the module to capture low-level acoustic and vibration signals while maintaining a wide usable measurement range.
The PXIe-4464 is suitable for microphones, accelerometers and other voltage-output transducers used in automotive NVH, audio testing, machine condition monitoring and structural vibration measurement. It can be integrated with additional PXI measurement modules to create synchronized multichannel test systems.
Key Features of the PXIe-4464
- Four simultaneously sampled analog input channels
- 24-bit delta-sigma ADC resolution
- 100 S/s to 204.8 kS/s sampling per channel
- Up to 119 dB typical dynamic range
- Alias-free bandwidth up to approximately 92.9 kHz
- 120 dBc minimum alias rejection
- Six software-selectable gain settings
- Input ranges from ±0.316 V to ±42.4 V peak
- Independent AC or DC input coupling
- Differential or pseudodifferential input configuration
- Integrated 4 mA, 10 mA and 20 mA IEPE excitation
- 25 V IEPE compliance voltage
- Software-readable IEPE sensor open and short detection
- IEEE 1451 Class I TEDS support
- Automatically adjusted antialiasing filters
- Two independent timing engines
- Analog and digital triggering
- BNC or mini-XLR connector options
- PXI Express interface
PXIe-4464 Technical Specifications
| Product Model | PXIe-4464 |
|---|---|
| Product Type | PXI Sound and Vibration Input Module |
| Analog Input Channels | 4 simultaneously sampled channels |
| Analog Output Channels | None |
| ADC Resolution | 24 bits |
| ADC Type | Delta-sigma |
| Sample Rate Range | 100 S/s to 204.8 kS/s per channel |
| Maximum Dynamic Range | 119 dB typical |
| Alias-Free Bandwidth | DC to 0.454 × sample rate |
| Maximum Alias-Free Bandwidth | Approximately 92.9 kHz |
| Alias Rejection | 120 dBc minimum |
| Input Gain Settings | −20 dB, −10 dB, 0 dB, 10 dB, 20 dB and 30 dB |
| Input Voltage Ranges | ±0.316 V, ±1 V, ±3.16 V, ±10 V, ±31.6 V and ±42.4 V peak |
| Input Coupling | AC or DC, independently selectable per channel |
| AC-Coupled High-Pass Cutoff | 0.72 Hz at −3 dB |
| Input Configuration | Differential or pseudodifferential |
| IEPE Excitation | Off, 4 mA, 10 mA or 20 mA |
| IEPE Compliance | 25 V |
| TEDS Support | IEEE 1451 Class I on all inputs |
| Timing Engines | 2 |
| Front Trigger Connector | SMB PFI0 |
| Bus Interface | PXI Express |
| Slot Compatibility | x1 or x4 PXI Express and compatible hybrid slots |
| Operating Temperature | 0°C to 55°C |
PXIe-4464 Part Numbers and Connector Options
| Part Number | Analog Input Connectors | Trigger Connector |
|---|---|---|
| 783087-01 | 4 × BNC female | 1 × SMB male |
| 783087-02 | 4 × mini-XLR male | 1 × SMB male |
Both versions provide the same primary acquisition, signal-conditioning and timing capabilities. Select part number 783087-01 for standard BNC connections or 783087-02 when balanced mini-XLR connectivity is preferred.
Four-Channel Simultaneous Sampling
All four PXIe-4464 input channels are sampled simultaneously. Simultaneous acquisition preserves the phase and timing relationship among sensors, which is essential for vibration analysis, acoustic measurements and frequency-response testing.
Each channel can independently select its input range, AC/DC coupling, IEPE current and differential or pseudodifferential configuration. This flexibility allows different signal levels and sensor types to be measured on the same module.
24-Bit Dynamic Signal Acquisition
The module uses a dedicated 24-bit delta-sigma ADC for each input channel. Delta-sigma conversion provides low-noise performance and integrated digital filtering for high-accuracy frequency-domain measurements.
Sample rates can be configured from 100 S/s to 204.8 kS/s. The antialiasing filters automatically adjust according to the selected sample rate, reducing configuration complexity and helping prevent out-of-band signals from appearing within the measurement spectrum.
Six Input Gain Ranges
The PXIe-4464 provides six software-selectable gain settings. Higher gain settings improve measurement sensitivity for low-level sensors, while negative gain settings accommodate larger voltage signals.
| Gain Setting | Full-Scale Peak Range | Full-Scale RMS Sine Input |
|---|---|---|
| 30 dB | ±0.316 V | 0.224 V RMS |
| 20 dB | ±1 V | 0.707 V RMS |
| 10 dB | ±3.16 V | 2.24 V RMS |
| 0 dB | ±10 V | 7.07 V RMS |
| −10 dB | ±31.6 V | 22.4 V RMS |
| −20 dB | ±42.4 V | 30 V RMS |
Select the smallest range that accommodates the sensor’s bias and maximum expected signal. This generally provides the best measurement resolution without clipping.
Dynamic Range and Bandwidth
The PXIe-4464 provides a typical dynamic range of up to 119 dB in the standard audio measurement band. Dynamic range depends on the selected gain, sampling rate and measurement bandwidth.
The alias-free passband extends from DC to approximately 0.454 times the sample rate. At 204.8 kS/s, the usable alias-free bandwidth reaches approximately 92.9 kHz.
This bandwidth supports standard audio testing as well as ultrasonic, high-frequency vibration and rotating machinery measurements beyond the conventional 20 kHz audio range.
AC and DC Input Coupling
AC or DC coupling can be selected independently for each channel. DC coupling preserves both the static and dynamic portions of the signal and is useful for direct voltage and low-frequency measurements.
AC coupling removes the DC component, allowing the dynamic portion of the signal to use more of the available input range. The AC-coupled input has a −3 dB cutoff frequency of approximately 0.72 Hz and a −0.1 dB cutoff near 4.7 Hz.
Use DC coupling when the application must measure signal content approaching DC. Use AC coupling when a sensor bias or DC offset should be removed before dynamic analysis.
Integrated IEPE Sensor Excitation
The PXIe-4464 provides independently selectable IEPE constant-current excitation on all four input channels. Available settings are 4 mA, 10 mA and 20 mA, with a compliance voltage of 25 V.
The higher excitation settings support compatible high-power sensors and can improve operation over long sensor cable runs. Before enabling IEPE current, verify the sensor’s specified excitation range and bias voltage.
Integrated IEPE conditioning is suitable for:
- IEPE accelerometers
- IEPE microphones
- IEPE force sensors
- IEPE impact hammers
- IEPE pressure sensors
- Other ICP-compatible transducers
IEPE Sensor Open and Short Detection
The PXIe-4464 can report IEPE sensor open-circuit and short-circuit conditions through software. This helps identify disconnected sensors, damaged cables and wiring faults before or during a measurement.
Sensor detection is especially valuable in systems with long cable runs or several installed accelerometers where manually checking each connection would be time-consuming.
TEDS Smart Sensor Support
All four inputs support IEEE 1451 Class I Transducer Electronic Data Sheet technology. A compatible TEDS sensor stores identification, sensitivity and calibration information in onboard sensor memory.
Measurement software can read this data to automatically configure engineering units and scaling. TEDS helps reduce manual entry errors when sensors are frequently changed or when many channels must be configured.
Differential and Pseudodifferential Inputs
Each PXIe-4464 channel can be independently configured for differential or pseudodifferential input. Differential measurement helps reject common-mode interference and is preferred when the source provides balanced outputs.
Pseudodifferential mode connects the negative input to chassis ground through a 50 Ω resistance. It can be used with ground-referenced sources, but grounding and common-mode voltage must be evaluated carefully.
The analog inputs are not isolated. Do not exceed the specified signal, common-mode or overvoltage limits.
Two Independent Timing Engines
The PXIe-4464 includes two timing engines. Channels can be divided into groups that operate with different sample rates or start and stop conditions while using the same reference clock source.
This capability is useful when one group of sensors requires continuous lower-rate monitoring and another group requires higher-rate triggered acquisition.
Triggering and Synchronization
The module supports analog reference triggering and digital start or reference triggers. Trigger sources include the front-panel PFI0 connection, PXI trigger lines, PXI Star and supported PXI Express differential star trigger resources.
Multiple PXIe-4464 modules can be synchronized when more than four measurement channels are required. A common timebase should be used when maintaining the phase relationship between modules is important.
Typical PXIe-4464 Applications
- Sound and vibration measurement
- Automotive NVH testing
- Machine condition monitoring
- Predictive maintenance
- Structural vibration analysis
- Modal and impact testing
- Acoustic measurement
- Microphone array acquisition
- Rotating machinery diagnostics
- Audio signal analysis
- Frequency-response measurement
- IEPE accelerometer acquisition
- Aerospace vibration testing
- Research and laboratory automation
Software and Driver Support
The PXIe-4464 is controlled using the NI-DAQmx driver. NI-DAQmx provides configuration functions for input range, coupling, IEPE excitation, TEDS, sampling, triggering and synchronization.
FlexLogger can be used for interactive sensor configuration, data logging, alarms and machine monitoring. LabVIEW supports custom measurement applications, while the LabVIEW Sound and Vibration Toolkit adds frequency, octave, order, transient and vibration analysis functions.
NI DIAdem can be used for offline analysis, visualization and automated reporting. Verify the required driver, operating system and software versions before installing the module in an existing PXI system.
PXIe-4464 Chassis Compatibility
The PXIe-4464 is a PXI Express peripheral module compatible with supported x1 and x4 PXI Express or PXI Express hybrid slots. It cannot operate in a conventional PXI-only peripheral slot.
Before purchasing, check the chassis slot type, controller compatibility, cooling, NI-DAQmx support and available timing resources. High-channel-count synchronized systems should also consider backplane bandwidth and clock distribution.
PXIe-4464 Troubleshooting
The Input Signal Is Clipped
Select a lower gain setting or wider input range. Include the IEPE sensor bias voltage and expected transient peaks when determining the required range.
An IEPE Sensor Produces No Signal
Confirm that IEPE excitation is enabled and that the selected current is compatible with the sensor. Review the software-readable open and short status and inspect the sensor cable.
Low-Frequency Signals Are Attenuated
Check whether AC coupling is enabled. Select DC coupling when measurements must include static or very low-frequency signal content.
The Measurement Contains Excessive Noise
Use differential wiring when possible, select the smallest suitable input range and keep sensor cables away from motors, power converters and high-current conductors.
The BNC Version Is Sensitive to Electromagnetic Interference
Check the cable shield and grounding arrangement. For some BNC differential measurements, an additional grounded cable shield or ferrite suppression may improve noise immunity.
TEDS Information Cannot Be Read
Verify that the sensor supports IEEE 1451 Class I TEDS and that the cable correctly connects the TEDS data path. Also check the NI-DAQmx channel configuration.
Channels Do Not Start at the Same Time
Confirm that the channels use the intended timing engine, start trigger and reference clock. Modules used for phase measurements should share a common timebase.
PXIe-4464 Compared with Similar Sound and Vibration Modules
| Model | Analog Inputs | Analog Outputs | Maximum Sample Rate | Dynamic Range | Primary Use |
|---|---|---|---|---|---|
| PXI-4462 | 4 | 0 | 204.8 kS/s | 118 dB | Legacy PXI sound and vibration acquisition |
| PXIe-4464 | 4 | 0 | 204.8 kS/s | 119 dB | PXI Express acquisition with IEPE and TEDS |
| PXIe-4468 | 2 | 2 | 250 kS/s | 121 dB | Combined signal acquisition and generation |
| PXIe-4480 | 6 | 0 | 1.25 MS/s | 115 dB | High-bandwidth acquisition with advanced sensor conditioning |
The PXIe-4464 is suitable when four synchronized IEPE or voltage input channels are required. Choose the PXIe-4468 when the system also needs dynamic analog outputs, or select the PXIe-4480 when higher bandwidth, additional inputs, charge measurement or sensor voltage excitation is required.
Recommended Related Products
- PXIe-4468 Sound and Vibration Module – Combines two 250 kS/s inputs with two precision analog outputs and IEPE conditioning.
- PXIe-4480 Sound and Vibration Module – Provides six 1.25 MS/s inputs with IEPE, charge, voltage excitation and TEDS support.
- PXIe-4481 Analog Input Module – Provides six higher-bandwidth voltage inputs with time-domain sampling up to 20 MS/s.
- PXIe-4463 Dynamic Signal Generation Module – Adds two precision analog output channels for sound and vibration stimulus generation.
- PXI-4462 Sound and Vibration Module – A legacy four-channel PXI option for existing systems.
How to Select the Correct PXIe-4464
Choose the PXIe-4464 when the application requires four simultaneously sampled, 24-bit voltage channels with sampling rates up to 204.8 kS/s and integrated IEPE conditioning.
Before ordering, confirm the following:
- BNC or mini-XLR connector requirement
- Number of input channels
- Maximum signal frequency and required sample rate
- Sensor output and required input range
- IEPE excitation current requirement
- AC- or DC-coupled measurement
- Differential or pseudodifferential wiring
- TEDS sensor compatibility
- PXI Express chassis slot type
- NI-DAQmx and analysis software compatibility
Why Choose the PXIe-4464?
The PXIe-4464 combines four synchronized 24-bit inputs, high dynamic range and integrated sensor conditioning in a compact PXI Express module. It provides the measurement quality required for acoustic and vibration analysis while simplifying IEPE sensor connections.
Six gain ranges, two timing engines, TEDS support and flexible triggering make the module suitable for both laboratory research and automated monitoring systems.
Frequently Asked Questions
What is the PXIe-4464?
The PXIe-4464 is a four-channel, 24-bit PXI Express dynamic signal acquisition module for sound, vibration and IEPE sensor measurements.
What are the PXIe-4464 part numbers?
Part number 783087-01 uses BNC connectors, while 783087-02 uses mini-XLR connectors.
What is the maximum sample rate?
All four channels can sample simultaneously at rates up to 204.8 kS/s per channel.
What is the dynamic range?
The PXIe-4464 provides a typical dynamic range of up to 119 dB under the specified gain, sample-rate and measurement-bandwidth conditions.
Does the PXIe-4464 support IEPE sensors?
Yes. Each input independently supports 4 mA, 10 mA or 20 mA IEPE excitation with 25 V compliance.
Does it support TEDS sensors?
Yes. All four inputs support IEEE 1451 Class I TEDS smart sensors.
What input voltage ranges are available?
The module provides six full-scale ranges from ±0.316 V to ±42.4 V peak.
Does the PXIe-4464 support AC and DC coupling?
Yes. AC or DC coupling can be selected independently for every analog input channel.
Does it have analog output channels?
No. Select the PXIe-4468 or combine the PXIe-4464 with a PXIe-4463 when dynamic signal generation is required.
Are the analog inputs isolated?
No. The channels are not isolated, so signal grounding and common-mode voltage must remain within the specified limits.
Which driver controls the PXIe-4464?
The module uses NI-DAQmx and can be operated with supported versions of FlexLogger, LabVIEW and other compatible development environments.
Request a Quote for the PXIe-4464
Contact us for current availability, lead time and project pricing for the PXIe-4464 Sound and Vibration Module. Please specify whether you require the 783087-01 BNC version or the 783087-02 mini-XLR version.
We can also help verify compatible PXI Express chassis, controllers, IEPE sensors, cables and sound and vibration analysis software for your system.
