User application images for PC instrumentation cards - signal capture, 
generation and digital pattern signals
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Signal capture cards

Often referred to as PC oscilloscope, transient recorder or digitiser (digitizer) cards, all of these are used to record analogue signals at high speed and with a very high level of instrumentation accuracy

m2i digitizer cards PCIe-x4 lane m4i digitizer card PCIe-x8 lane
Spectrum M2p digitiser cards.

The M2p card series has our greatest selection of channel and resolution combinations
to provide exceptional performance for applications such as radar, telecommunications, ultrasonics and name but a few. In fact just about any application that requires ultra high-speed signal capture in the MHz range. A/D converter speeds range from 5 to 125 mega samples per second. Each channels of the M2p signal capture card is equipped with its own A/D converter, ensuring perfect synchronisation hence zero phase difference between input channels. High channel count, wide gain ranges and software selectable single-ended or differential inputs provides exceptional operating versatility.

These cards are physically compact (half-length) and have a fast x4-lane PCIe interface making them commaptable to a very wide range of computer motherboards and chassis sizes.

M2p cards ship with driver software, which allows the cards to be programmed in the Windows or Linux enviroments. This can be performed using one of the text base languages such a C/C++, Visual Basic, Python, etc. Alternatvley LabVIEW or MATLAB. Or simply use SBench6 which requires no programming experience to capture, record, display and process the data. It's all menu driven and wit the Professional version data can be exported in a number of formats.
Spectrum M4i digitiser cards.

Using a high bandwidth multi-lane PCI Express Gen 2.0 interface (physically PXI Express in the case of M4x series), data streaming to the host computer is greatly enhanced with giga byte transfer capability. Fitted with 8 bit, or high resolution 14 / 16 bit A/D ulta high speed A/D converters, sampling speeds up to 5 giga samples per second are possible. This makes the M4i / M4x card series of particular value to users acquiring ultra fast signals - if necessary over long periods.

Up to eight M4i PCIe cards can be perfectly synchronised to provide up to 32 channels for signal capture. The number of M4x PXIe cards is only limited by the number of available PXIe or PXI hybrid slots in the chassis as all synchronisation performed via the back-plane.

The M4i / M4x series also shares the same comprehensive well proven software driver set as the M2p cards, which includes support for all common programming languages and packages such as LabVIEW and MATLAB.

Spectrum M2p / M4i / M4x series card feature summary

indexbar (1K) Up to 8 fully synchronous channels on one card.
indexbar (1K) Synchronisation of multiple cards possible, both for sampling and trigger
indexbar (1K) Versatile trigger features with fast auto re-arm
indexbar (1K) Large standard memory, 4 Gbytes on M4i & M4x, 1 Gbyte on M2p
indexbar (1K) Multiple Recording / Gated Sampling † with pre-trigger, post-trigger, fast rearm & time stamp
indexbar (1K) ABA mode available. Go from slow continuous to rapid acquisition on trigger events.
indexbar (1K) Optimised clock section, internal or external clock reference
indexbar (1K) M2p, M4i & M4x have a multi-lane PCI-Express interface for GByte streaming with the PC*
indexbar (1K) Versatile and wide ranging software support, all cards use a universal driver set for Windows® and Linux®
*Gen 2 x8-lane PCI-express currently provides the best streaming performance within the Spectrum digitiser range
Find out more about PCI-Express. Click here for more information
A dedicated fan for cooling the card bay of your PC, hence inserted cards, is essential.

digitizerNETBOX 16 channel A/D model - link to info page

Spectrum's digitizerNETBOX places the ultra fast instrumentation card technology described on this page into a robust enclosure that can be attached to the Gbit Ethernet port of a computer. Combine with a notebook PC and DC option for portability, or within an extended Ethernet network which may include more digitizerNETBOX units. This unit includes its own Web server which gives the facility to remotely view and configure the setup. It also has its own IP address so that captured data can be streamed back over the network to a client PC. The digitizerNETBOX is very portable and can be taken with the operator, (e.g within a vehicle) using a notebook PC and DC option. For complete independence from a host computer, an embedded server option, with installed CPU, RAM and SSD is also available as an upgrade option.

The digitizerNETBOX docking station package includes SBench6 Professional for easy set up, log, view and signal processing. whilst Windows/Linux drivers provide programming in MATLAB™, LabVIEW™, or one of the popular programming languages such as Visual Basic or C. Interested? Click here for more details and a complete list of models!


This versatile card range fits into a wide range of computers, most commonly a desktop but also some types of industrial computers too. A choice of A/D converters are available, so whilst sampling speeds below are the maximum, slower converters are fitted to certain models to best match an application and help ensure the most cost effective solution.

M2p (PCIe - x4 lane)
Please click on the images for more information
(GS/s = Giga samples per second)
(MS/s = Mega samples per second)
M2p59 navigation image ,click hereM2p.59xx 16 bit125 MS/s1 , 2 , 4 , 8

M4i (PCIe - x8 lane)
M4i.22xx card navigation imageM4i.22xx 8 bit5GS/s1 , 2 , 4
M4i.445x card navigation imageM4i.44xx 14 to 16 bit500MS/s1 , 2 , 4

For existing users of the older PCI and PCI-Express M2i and M3i series cards, who simply wish for a drop-in replacement, we can still supply. Please contact us for further information. For new applications we now recommend the M2p and M4i series cards.


This card range provides a particularly modular and robust format, most popular in the industrial environment. All are notable by the fact that synchronisation and triggering is neatly connected across a back plane of the mating enclosure. The latest generation of fast data streaming 3U PXI-Express signal capture cards is offered by the M4x range.

M4x (PXIe - x4 lane)
Please click on the images for more information
(GS/s = Giga samples per second)
(MS/s = Mega samples per second)
M4x.22x PXIe card navigation imageM4x.22xx 8 bit5GS/s1 , 2 , 4
M4x,44x PXIe card navigation imageM4x.44xx 14 to 16 bit500MS/s1 , 2 , 4