ADLINK PCIe-10GPoE 10GigE Visual Acquisition Card Practical Use

2.4 PTP time synchronization configuration

X550-AT2 supports hardware PTP (IEEE 1588) and can achieve microsecond level synchronous triggering of multiple cameras, suitable for dynamic detection or 3D reconstruction. When configuring, it is necessary to ensure that all devices and switches support PTP and use the Grandmaster clock as the reference, with PCIe-10GPoE as the slave clock. Regularly monitor the synchronization offset, and check for network jitter or switch forwarding delay when it exceeds 1 μ s.

Power management and troubleshooting of PoE power supply faults

3.1 PoE Power Budget Allocation Strategy

When powering on both ports simultaneously, it is essential to calculate the total power consumption. If the power consumption of a single camera is 25W, then the two ports have a total of 50W, and Molex auxiliary power supply needs to be connected (otherwise the total power is less than 20W, which may cause the camera to restart repeatedly). It is recommended to use 18AWG wire for the power cable (Molex 4-pin) and ensure that the+12V output capability of the PC power supply is ≥ 6A. The power consumption of each port can be monitored in real time using APIs or supporting tools. If abnormal fluctuations in power consumption are found (such as a sudden drop from 20W to 5W), it may be due to PD end faults or excessive cable impedance, and the finished cable should be replaced for testing first.

3.2 Common PoE exceptions and their handling

Port unable to supply power: Check if the camera supports PoE+; Measure the voltage between RJ45 pins 4/5 and 7/8 with a multimeter (normally 48V~52V). If there is no voltage, check if the PoE Hardware Switch is in the ON position or query the PoE status register through the API.

Power interruption (unstable): may be triggered by overheating protection - the upper limit of the board's operating temperature is 60 ℃. If the cabinet temperature is too high, a fan needs to be installed to force convection. PoE power can also be reduced (limiting the maximum output per port) through API settings.

Data interruption after non PoE camera connection: Non PoE cameras will not request power from PSE, and the board should automatically enter data mode. If negotiation fails, try forcing a 100M/1G rate (as 10M is not supported) and check if MDI/MDIX auto flip is turned off.

Network performance bottleneck and frame loss analysis

4.1 Bandwidth saturation evaluation

The theoretical peak of 10G port is about 1.25GB/s, but it is actually limited by PCIe transmission, memory bandwidth, and CPU processing capacity. Actual throughput can be tested using iperf or specialized tools such as Jperf. If the continuous packet loss rate is greater than 0.01%, first check if the flow control of the switch is enabled - PCIe-10GPoE supports 802.3x flow control and should be enabled and configured in "symmetric mode", otherwise receiving buffer overflow will cause frame loss.

4.2 Disconnect affinity and CPU binding

Binding network card interrupts to dedicated CPU cores (to avoid sharing with other high load interrupts) can significantly improve processing efficiency. Using irqbalance or manually setting smp-affinity in Linux; In Windows, it can be set through "Device Manager → Network Card Properties → Interrupt Management". For dual ports, it is recommended to bind them separately to different physical cores to balance the load.

4.3 Cable and connector quality

10G signals are extremely sensitive to cable quality, and the crosstalk and insertion loss of inferior CAT6a cables may lead to an increase in bit error rate (BER), triggering retransmission and a sharp drop in effective throughput. It is recommended to use S/FTP cables with shielding layers and check if the gold plating layer of the connector is oxidized. If the cable cannot be replaced on site, the speed can be reduced to 5G (NBASE-T) operation to ensure stability.

Coordination of multi card and multi camera systems

This card supports installing multiple PCIe-10GPoEs in the same system, but attention should be paid to PCIe channel allocation. Each card occupies x4 Gen3. If the motherboard only has x16 slots (electrical x16), multiple cards can be installed, but the total bandwidth is limited by the chipset uplink (usually x4 DMI 3.0, about 32Gbps). If the dual card quad camera is running at full speed, it is necessary to ensure that the motherboard supports direct connection of CPU to PCIe or uses a server level platform (such as Intel C621 chipset) to obtain sufficient bandwidth.

Driver and software compatibility

Officially supports Windows 7/10 64 bit and Linux Ubuntu 12.04 64 bit, but in practical applications, it is recommended to use Windows 10 LTSC or Ubuntu 18.04/20.04 (driver compatibility needs to be verified by oneself). The SDK supports C #/VB. NET/VC++and provides integration with Linghua AVS (Vision Software) to accelerate application development. Attention: The 10G network card driver defaults to enabling a large amount of hardware uninstallation (checksum uninstallation, TSO, etc.). If data corruption occurs, you can first disable the uninstallation function for testing.