M3i.32xx: 12 bit PCI / PCI-X / PCI-Express signal recorder sampling up to 500 MS/s

M3i logo
Up to 500M Samples/sec on one channel
Up to 250M Samples/sec on two channels
Simultaneous sampling on all channels
6 input ranges from 200 mV to 10 V (buffered path) more info
Versatile recording trigger features, including auto re-arm
2 synchronous digital channels with multi-purpose I/O facility
Up to 1 GSample (2 GByte) memory
FIFO (streaming) mode for high-speed data transfer to the PC

M3i32xx image

The 12-bit converter is a popular choice as it gives good signal resolution and speed, here it is combined with a high-speed A/D converter choice of 250 or 500 mega samples per second, one dedicated to each channel for perfect cross-channel phase synchronisation. Incommon with other cards in the M3i series, the wide bandwidth input section, has a software enabled 20MHz anti-aliasing filter and a pair of digital inputs that can be sampled simultaneously with the analogue channels. This versatility extends to the option of a multi-purpose digital I/O section that may be added for asynchronous control or status monitoring of external equipment. Combine with other Spectrum cards (e.g. waveform generators) via the Star-Hub option, to provide even greater flexibility to suit many applications.

Standard features

  • FIFO mode more info
  • 10-bit resolution analogue channel trigger.
  • Dedicated connection for external trigger input, programmable in 1 mV (analogue) steps, or for TTL
  • Dedicated connection for external TTL clock input, or to output the cards sampling clock
  • Two general purpose digital I/O connectors configurable as asychronous or synchronous to sampling, or as extra TTL trigger lines
  • Postive and negative edge trigger more info
  • Auto re-arm on edge trigger more info
  • High and low level trigger more info
  • Window triggermore info
  • AND/OR multiple trigger event combinations
  • Progammable delay until trigger recognition
  • SBench 6.x windows software
  • Deep standard memory: 256 MSample (512 MByte)
  • Selectable input impedance to 50 Ohm or 1 MOhm
  • 20MHz bandwidth (anti-aliasing) filter

Enhancements included More information on enhancements

  • ABA mode - Variable sampling speed, jump to fast capture on trigger
  • Multiple Recording - multiple sequential signal capture using fast repetative triggers, auto re-arm
  • Time stamp - records the time of each trigger event

Special (cost) options More information on options

  • BASEXIO - Extra asynchronous digital I/O with additional trigger lines
  • Memory upgrade to 512MSample or 1 GSample
  • Threaded SMA signal connectors instead of SMB on card end plate
  • Synchronisation Star Hub - synchronise up to 8 cards
  • Remote Server - programme, control and monitor Spectrum M2i, M3i or M4i cards in a remote location

Product range overview


max sample rate

name 1 channel 2 channel
M3i.3220 250 MS/s  
M3i.3221 250 MS/s 250 MS/s
M3i.3240 500 MS/s  
M2i.3242 500 MS/s 250 MS/s
PCI-Express versions simply suffixed -exp, e.g. M3i.3242-exp

Pre-Amplifier modules

Recording very small signals? High frequency wide bandwidth pre-amplifiers are available to enhance the gain range of the M3i range.
Click on the image below for more information.

SPA_amplifier module - link to information page


  • Standard drivers Windows XP / Vista / Windows 7, 8, 10 and Linux
  • SBench 6.x signal processing windows software
  • Drivers for LabVIEW and LabWindows/CVI. (VEE and Dasylab by special order)
  • Driver for MATLAB


pdf link to m3i datasheet [PDF data sheet]
pdf link to m3i manual [PDF manual]

[SBench 6.x] Windows/Linux download allows testing of SBench functionality with or without hardware.

More information can be easily requested from our catalogues and pricing web page, or feel free to contact Dataquest Solutions directly.

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Spectrum GmbH
Last modified by Dataquest Solutions Ltd. 15.05.18