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Comparison of M4i.44xx with M3i.32xx, M3i.41xx and M3i.48xx series

The article compares the older high-speed, high-resolution M3i series 32xx, 41xx and 48xx with the newer M4i.44xx series and show all the technical differences. The table compares all Spectrum products between 100 MS/s and 500 MS/s sampling rate with a resolution of ?12 bit.

Please note that all mentioned series are based on the SPCM driver and therefore software compatible. Changing from one of the mentioned series to another will only need a very few adaptions to your software to handle the different resolution, sampling rate or input settings.

SpecificationM4i.44xxM3i.41xxM3i.32xxM3i.48xx

Low Speed

       
Sampling rate 130 MS/s 100 MS/s - 105 MS/s
Resolution 16 bit 14 bit - 16 bit
Channels 2 or 4 1 or 2 . 1 or 2

Mid Speed

       
Sampling rate 250 MS/s 250 MS/s 250 MS/s 180 MS/s
Resolution 16 bit 14 bit 12 bit 16 bit
Channels 2 or 4 1 or 2 1 or 2 1 or 2

High Speed

       
Sampling rate 500 MS/s 400 MS/s 500 MS/s -
Resolution 14 bit 14 bit 12 bit -
Channels 2 or 4 1 or 2 (half speed) 1 or 2 (half speed) -

Input Section

       
Input ranges 200mV to 10V 200mV to 10V 200mV to 10V 200mV to 10V
Input Termination 50? and 1M? 50? and 1M? 50? and 1M? 50? and 1M?
Input Coupling AC/DC AC/DC AC/DC AC/DC
Auto Calibration Yes Yes Yes Yes

Acquisition Modes

       
FIFO Streaming Yes (fast) Yes Yes Yes
Multiple Recording Yes Yes Yes Yes
Gated Sampling Yes - - -
ABA Mode Yes Yes Yes Yes
Timestamps Yes Yes Yes Yes

Mechanical

       
Dimension (PCIe) length full length full length full length
Connectors SMA + MMCX SMB + MMCX SMB + MMCX SMB + MMCX

Memory and Bus

       
Standard memory 2 GSamples 256 MSamples 256 MSamples 256 MSamples
Memory options - 1 GSample 1 GSample 1 GSample
PCIe bus interface PCIe x8 Gen2 PCIe x1 Gen1 PCIe x1 Gen1 PCIe x1 Gen1
PCIe data transfer speed 3400 MB/s 160 MB/s 160 MB/s 160 MB/s
PCIe series link M4i.44xx-x8 M3i.41xx-exp M3i.32xx-exp M3i.48xx-exp
PCI bus interface - PCI/PCI-X 32 bit 66 MHz PCI/PCI-X 32 bit 66 MHz PCI/PCI-X 32 bit 66 MHz
PCI data transfer speed - 200 MB/s 200 MB/s 200 MB/s
PCI series link - M3i.41xx M3i.32xx M3i.48xx
PXIe bus interface PXIe x4 Gen2 - - -
PXIe data transfer speed 1700 MB/s - - -
PXIe series link M4x.44xx-x4 - - -
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E-Mail greg.tate@spectrum-instrumentation.com
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