Knowledge-Base
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.
| Specification | M4i.44xx | M3i.41xx | M3i.32xx | M3i.48xx |
|---|---|---|---|---|
Low Speed |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| Dimension (PCIe) | length | full length | full length | full length |
| Connectors | SMA + MMCX | SMB + MMCX | SMB + MMCX | SMB + MMCX |
Memory and Bus |
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| 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 | - | - | - |