Technical information
AVT GigE camera and driver features
AVT GigE Camera and Drivers Features V2.0.0
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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