M3i.21xx: 8 bit PCI / PCI-X / PCI-Express signal recorder sampling up to 1 GS/s

M3i logo
Latest generation of monolithic A/D converters
Up to 1G Samples/sec on one channel
Up to 500M Samples/sec on two channels
Simultaneous sampling on all channels
6 input ranges from 50 mV to 10V more info
Input can be offset up to 100 % for improved resolution
Versatile recording trigger options, 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

M3i21xx image

The M3i.21xx series 8-bit digitiser provides an ultra high-speed 1 Giga sample per second capture. Each input channel has its own latest generation monolithic A/D converter and amplifier giving synchronous zero phase delay between multiple channels, or further cards within a system (see Star Hub option below). The highly configurable amplifier stage consists of eight ranges to make good use of the available conversion resolution, whilst selecting the 50-ohm terminated path provides a bandwidth of up to 500 MHz. In addition each channel has a programmable AC/DC coupling and a selectable low pass anti-aliasing filter to optimise against unwanted sampling effects. The large standard on-board memory of 512 Mbytes can be substituted with up to 2 Gbytes to maximise capture time if so desired.

Standard features

  • FIFO mode for streaming data to PC more info
  • 8-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 asynchronous or synchronous to sampling, or as extra TTL trigger lines
  • Positive 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
  • Programmable delay until trigger recognition
  • SBench 6.x windows software
  • Deep standard memory: 512 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 repetitive 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 1 or 2 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.2120 500 MS/s  
M3i.2122 500 MS/s 250 MS/s
M3i.2130 1 GS/s  
M2i.2132 1 GS/s 500 MS/s
PCI-Express versions simply suffixed -exp, e.g. M3i.2130-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