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- Comparisons
- System
Comparison of M4i (PCIe) and M4x (PXIe) platform
The M4i (PCIe) and M4x (PXIE) cards are both based on the same hardware platform. In fact the analag front-end module is exactly the same. Therefore all analog specification is identical on both platforms. There are a few differences between the two types based on the interface and the available options:
| M4i (PCIe) | M4x (PXIe) | Comment | |
|---|---|---|---|
| Module Interface | PCIe x8 Gen2 | PCIe x4 Gen2 | only half of the lanes connected on the PXIe slot |
| Data transfer speed | 3.0 to 3.4 GB/s | 1.5 to 1.7 GB/s | faster streaming speed on PCIe |
| Module Size | size PCIe single slot | 3U double slot | |
| Analog Connectors | 4 x SMA | 4 x SMA | |
| Clock/Trigger Input | 2 x SMA | 2 x SMA | |
| Clock/Trigger Output | 2 x MMCX | 2 x SMA | Different connector type on PXIe |
| Multi-Purpose I/O | 3 x MMCX | 3 x MMCX | |
| Internal Synchronization | Star-Hub | PXI lines | PCIe platform allows it internally synchronize up to 8 cards with lowest skew |
| Internal Clock | Programmable | Programmable | |
| Reference Clock | External | External or PXI | |
| Trigger | External, Channel | External, Channel, PXI | Support of PXI Star-Trigger and trigger bus |
| Mechanical Fixture | Front panel + connector | Front panel + connector + slides | |
| Cooling | System dependent | Defined by PXI |