PXIe-5108 14-Bit 250 MS/s 100 MHz PXI Oscilloscope
The PXIe-5108 is a high-channel-count PXI Express oscilloscope and digitizer that combines 14-bit resolution, sampling rates up to 250 MS/s and 100 MHz analog bandwidth. It is available in four-channel and eight-channel simultaneously sampled versions.
The module is designed for automated functional testing, transient capture, power-electronics measurements, electromechanical validation and multichannel waveform analysis. Configurable 50 Ω and 1 MΩ inputs allow it to measure both terminated high-frequency signals and higher-voltage general-purpose signals.
Key Features of the PXIe-5108
- Four-channel or eight-channel versions
- All channels sampled simultaneously
- 14-bit analog-to-digital resolution
- Maximum real-time sample rate of 250 MS/s
- 100 MHz analog bandwidth
- 50 Ω and 1 MΩ selectable input impedance
- AC and DC input coupling
- Input ranges from 0.2 Vpk-pk to 80 Vpk-pk
- 256 MB or 512 MB onboard memory
- Analog, digital, window and hysteresis triggering
- Eight bidirectional front-panel PFI lines
- PXI Express synchronization support
- NI-SCOPE driver compatibility
PXIe-5108 Ordering Versions
| Part Number | Channels | Onboard Memory | Description |
|---|---|---|---|
| 790584-01 | 4 simultaneously sampled channels | 256 MB | Four-channel PXIe-5108 oscilloscope |
| 790585-01 | 8 simultaneously sampled channels | 512 MB | Eight-channel PXIe-5108 oscilloscope |
Always include the full ordering part number in the quotation request. The model name alone does not identify whether the required module has four or eight analog channels.
PXIe-5108 Technical Specifications
| Product Model | PXIe-5108 |
|---|---|
| Product Type | PXI Express oscilloscope and digitizer |
| Analog Channels | 4 or 8, depending on part number |
| ADC Resolution | 14 bits |
| Maximum Sample Rate | 250 MS/s per simultaneously sampled channel |
| Real-Time Sample-Rate Range | Approximately 3.815 kS/s to 250 MS/s |
| Analog Bandwidth | 100 MHz; 99 MHz on the 0.2 Vpk-pk 50 Ω range |
| Input Impedance | 50 Ω or 1 MΩ |
| Input Coupling | AC or DC |
| 50 Ω Input Ranges | 0.2, 0.7, 1.4, 5 and 10 Vpk-pk |
| 1 MΩ Input Ranges | 0.2, 0.7, 1.4, 5, 10, 40 and 80 Vpk-pk |
| Maximum 50 Ω Overload | 7 Vrms with peaks no greater than 10 V |
| Maximum 1 MΩ Overload | Peak magnitude no greater than 42 V |
| Input Connectors | SMB |
| Sample-Clock Jitter | 700 fs RMS |
| Analog Trigger Jitter | 15 ps RMS under specified conditions |
| Digital Bandwidth Filters | 20, 40 and 80 MHz |
| Bus Interface | PXI Express Gen 2 x8 |
| Typical Power | Approximately 20.25 W |
| Module Format | 3U, one-slot PXI Express module |
| Software Driver | NI-SCOPE |
14-Bit Measurement Resolution
The 14-bit ADC provides greater vertical resolution than conventional 8-bit oscilloscopes. This helps distinguish smaller changes in a waveform, especially when the selected input range closely matches the signal amplitude.
Effective measurement quality also depends on noise, distortion, bandwidth and the signal source. Additional nominal ADC bits do not by themselves guarantee equivalent usable resolution under all conditions.
Simultaneous Sampling
Every enabled analog channel is sampled simultaneously at rates up to 250 MS/s. This prevents the channel-to-channel timing uncertainty associated with multiplexed ADC architectures.
Simultaneous sampling is important for phase comparison, three-phase power analysis, motor testing, timing measurements and correlated transient capture.
Four- and Eight-Channel Versions
The 790584-01 version provides four channels and 256 MB of shared onboard memory. The 790585-01 version provides eight channels and 512 MB of shared memory.
Select the four-channel model when chassis cost and channel requirements are limited. Select the eight-channel version when signal correlation or channel density is more important.
50 Ω and 1 MΩ Inputs
The 50 Ω input mode is suitable for terminated high-frequency signal paths and laboratory RF-style connections. The 1 MΩ mode is suitable for passive probes and higher-voltage general-purpose measurements.
Before connecting a signal, verify the active input impedance. Accidentally applying a high-energy signal to a 50 Ω input can overload the source or damage the module.
Flexible Trigger System
Supported trigger types include edge, window, hysteresis, digital, immediate and software triggering. Any analog input can act as an analog trigger source.
The AUX connector provides eight bidirectional digital PFI lines. PXI trigger and differential-star resources can coordinate acquisitions with other modules.
Onboard Memory and Multi-Record Acquisition
Onboard memory stores acquired waveform records before transfer to the host. Multi-record acquisition can capture many triggered events with less software dead time than repeatedly initiating individual acquisitions.
The memory is shared among enabled channels, so the maximum samples per channel depend on channel count, record configuration and acquisition mode.
Digital Bandwidth Filters
Selectable 20 MHz, 40 MHz and 80 MHz digital filters can reduce high-frequency noise when the full 100 MHz bandwidth is not required.
Using an appropriate bandwidth limit can improve waveform readability and measurement repeatability without changing the external signal path.
PXIe-5108 Applications
- Multichannel automated waveform acquisition
- Production functional testing
- Power-electronics validation
- Motor and inverter measurements
- Transient and pulse capture
- Electromechanical system testing
- High-channel-count oscilloscope systems
- Audio and ultrasonic measurements
- Research and laboratory automation
- Hardware-in-the-loop signal monitoring
NI-SCOPE Software Support
NI-SCOPE provides APIs for configuring sample rate, input range, coupling, impedance, record length and triggers. Acquired data can be transferred to the host for analysis, display or storage.
The driver integrates with LabVIEW, LabWindows/CVI and compatible text-based programming environments. Self-calibration is recommended after the specified warm-up period or significant temperature changes.
PXIe-5108 Troubleshooting
The measured amplitude is incorrect
Check the selected input impedance, probe attenuation and voltage range. A source intended for a 50 Ω termination can produce approximately twice the expected voltage when connected to a 1 MΩ input.
The waveform appears clipped
Select a larger input range and verify that the signal, including vertical offset, remains within the permitted input and overload limits.
The waveform contains excessive noise
Use a smaller appropriate input range, enable a bandwidth-limiting filter and inspect grounding, shielding and probe compensation.
Only four channels appear
Check the complete part number. The 790584-01 version has four channels, while the 790585-01 version has eight.
Channel timing is not aligned across modules
Use a shared reference or sample clock and compatible PXI Express synchronization resources. Perform self-calibration to compensate supported intermodule alignment errors.
The module does not reach specified accuracy
Allow at least the specified 15-minute warm-up, run self-calibration and verify chassis cooling and external-calibration status.
PXIe-5108 vs PXIe-5105
| Feature | PXIe-5108 | PXI-5105 |
|---|---|---|
| Resolution | 14 bits | 12 bits |
| Maximum Sample Rate | 250 MS/s | 60 MS/s |
| Analog Bandwidth | 100 MHz | 60 MHz |
| Channel Options | 4 or 8 | 8 |
| Best Suited For | Higher-resolution, higher-speed multichannel acquisition | Legacy eight-channel PXI digitizer systems |
Recommended Related Products
- PXI-5105 8-Channel Digitizer
- PXI-5114 Digitizer
- PXI-5124 Digitizer
- PXIe-5160 High-Speed Oscilloscope
- PXIe-5185 High-Speed Digitizer
- PXIe-5186 High-Speed Digitizer
- View More NI PXI Modules
Frequently Asked Questions
What is the PXIe-5108?
The PXIe-5108 is a 14-bit PXI Express oscilloscope with up to eight simultaneously sampled channels, 250 MS/s sampling and 100 MHz bandwidth.
How many channels does it provide?
Part number 790584-01 provides four channels, while 790585-01 provides eight channels.
Is 250 MS/s shared between channels?
No. The channels use simultaneous sampling and can operate at up to 250 MS/s per enabled channel.
Does it support a 1 MΩ input?
Yes. Each analog input can be configured for 50 Ω or 1 MΩ impedance.
What is the highest input range?
The 1 MΩ input provides an 80 Vpk-pk full-scale range, subject to the stated peak-overload limit.
Which driver controls the module?
The PXIe-5108 uses NI-SCOPE.
Request a Quote for the PXIe-5108
Contact us for availability and project pricing for the PXIe-5108 14-Bit PXI Oscilloscope. Please specify whether you require the four-channel 790584-01 version or the eight-channel 790585-01 version.
