Technical information

AVT GigE camera and driver features

AVT GigE Camera and Drivers Features V2.0.0

This document is a master document for all AVT GigE camera models and is NOT camera specific

GevPersistentIPAddress [Integer] R/W

Persistent IP address of the device.

GevPersistentSubnetMask [Integer] R/W

Persistent subnet mask of the device.

StreamBytesPerSecond [Integer] R/W

Moderates the data rate of the camera. This is particularly useful for slowing the

camera down so that it can operate over slower links such as Fast Ethernet (100-

speed), or wireless networks. It is also an important control for multi-camera

situations. When multiple cameras are connected to a single Gigabit Ethernet

port (usually through a switch), StreamBytesPerSecond for each camera

needs to be set to a value so that the sum of each camera’s StreamBytes-

PerSecond parameter does not exceed the data rate of the GigE port. Setting

the parameter in this way will ensure that multiple camera situations work with-

out packet collisions, i.e. data loss.

To calculate the required minimum StreamBytesPerSecond setting for a

camera in any image mode, use the following formula:

StreamBytesPerSecond = Height x Width x FrameRate x Bytes per Pixel

115,000,000 is the typical maximum data rate for a GigE port. Beyond this set-

ting, some network cards will drop packets.

StreamFrameRateConstrain [Boolean] R/W

When True, camera automatically limits frame rate to bandwidth, determined

by StreamBytesPerSecond, to prevent camera buffer overflows and

dropped frames. If False, frame rate is not limited to bandwidth – only sensor

readout time. Latter case is useful for AcquisitionMode = Recorder or

StreamHoldEnable = On modes, as these modes are not bandwidth lim-

ited.

StreamHold

Normally, the camera sends data to the host computer immediately after com-

pletion of exposure. Enabling StreamHold delays the transmission of data,

storing it in on-camera memory, until StreamHold is disabled.

Display name: Persistent IP Address

Display name: Persistent Subnet Mask

Range: [1,000,000 – 124,000,000 (248,000,000 for GX in LAG mode)]

Units: Bytes/s

Note



If you are seeing occasional frames/packets reported as

StatFrameDropped/StatPacketMissed you will

likely need to decrease this parameter.

Possible values: True, False Default: True