66 • Operational Reference Genie Monochrome Series-GigE Vision CameraParameter DescriptionNetwork Configuration Mode Specifies the Network Configuration Mode as either Automatic, Manual, or Optimize. Ingeneral use Optimize mode. Some computers, especially laptops, may require manualoptimization of network parameters.The following parameters can be modified when Manual mode is selected.Inter-Packet Delay (in sec) Specifies the inter-packet delay, in sec. The range of permitted values is 0.000000 to0.065535. The inter-packet delay is the minimum time interval between two successivepackets. This can be increased if the NIC is unable to keep up with packet arrivals (thusdropping packets–seen as video noise).Packet Size (in bytes) Specifies the maximum packet size, in bytes. The range of possible values is 576 to 1500,in increments of 4 bytes when the NIC does not support jumbo packet. The maximum iscurrently 9000 bytes when jumbo packets are supported (see "Increasing Adapter Buffersand Jumbo Frames" on page 24 to enable jumbo packets on the NIC). In most situations,use the largest possible packet size supported by your network elements. In order tosupport jumbo packets, all intermediate network elements must support them, otherwisethey will simply be silently discarded and no image data will reach the PC.Heartbeat Timeout (in Sec) Specifies the heartbeat timeout, in seconds. The range of permitted values is 0.5 to 65, inincrements of 0.001 seconds. This is used by the camera to ensure the PC application isstill linked. If the heartbeat timeout expires, the camera will shutdown the connection tothe current application.Maximum Packet Resend Sets the percentage of packets that can be resent for each frame. This is used to ensurethe streaming data (including resends) does not exceed the Ethernet link capacity. As anexample, a system capturing at 80 MB/s can allow 25% of packet resends withoutexceeding 100 MB/s (about the maximum capacity of a gigabit Ethernet link).Network Controls via Sapera LT or GenICam ApplicationsSaperaGenie Sapera parameters for Network Configuration:NetworkConfigurationMode = {Automatic = 0, Manual = 1}InterPacketDelay = Minimum delay in μs between image packetsPacketSize = Image packet size in bytesHeartbeatTimeout = Heartbeat period (watchdog) in ms before camera disconnectMaximumPacketResend = Sets percentage of packets that can be resent per frameIn CamExpert, these parameters are available under the “GigE Vision” tab.See "Accessing Features with Sapera++ LT" on page 68.GenICam features for Network Configuration:PayloadSize = Size of the payload in bytes. This is the total number of bytes sent in the payload.No packet headers.Other networks parameters may be available through the 3rd party package used.
