Technical information

AVT GigE IR & scientific 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
ChunkDataControl
ChunkModeActive [Boolean] R/W
Enables camera to send GigE Vision Standard Protocol chunk data with an
image. The table below presents currently implemented chunk data:
Possible values: True, False Default: False
[Bytes 1 – 4] Acquisition count
[Byte 5]
These 8 bits indicate the following EF lens settings:
• Bit 7 (Error): When this bit is set to 1, the EF lens is in an error state, bits 2 – 5 indicate enumerated
value of last error, and all other bits and bytes will be 0.
• Bit 6 (Lens attached): When this bit is set to 1, an EF lens is attached to camera.
• Bit 5 (Auto focus): When this bit is set to 1, the EF lens manual/auto focus switch is set to the auto
focus position.
• Bits 2 – 4 (Last error): Enumerated error value:
– 0: No error detected
– 1: Lens failed query by camera
– 2: Lens communication error (can occur when removing lens)
– 3: Lens communication error (can occur when removing lens)
– 4: Lens remained busy for longer than 10 seconds
– 5: Lens focus “Zero Stop” not detected
– 6: Lens focus “Infinity Stop” not detected
• Bits 0 – 1: Upper 2 bits of focus percentage value (see Byte 6).
[Byte 6]
These 8 bits in conjunction with bits 0 – 1 of Byte 5, indicate the current focus position of the EF lens in
(percentage of maximum focus range) * 10 (i.e. 1000 = 100 percent = Infinity Stop).
If the lens manual/auto focus switch is in the manual position these bits will be 0.
[Byte7]
These 8 bits indicate the current aperture position of the EF lens in Dn. To convert Dn to FStop value,
use formula: FStop = 2 (Dn – 8) /16.
[Byte 8]
These 8 bits indicate the current focal length of the EF lens in mm.
[Bytes 9 – 12] Exposure value in µs.
[Bytes 13 – 16] Gain value in dB.
[Bytes 17 – 18]
Sync in levels. A bit field. Bit 0 is sync-in 0, bit 1 is sync-in 1, etc. A bit value of 1 = level high, and a bit
value of 0 = level low.
[Bytes 19 – 20]
Sync out levels. A bit field. Bit 0 is sync-out 0, bit 1 is sync-out 1, etc. A bit value of 1 = level high, and a
bit value of 0 = level low.
[Bytes 21 – 24] Reserved. 0
[Bytes 25 – 28] Reserved. 0
[Bytes 29 – 32] Reserved. 0
[Bytes 33 – 36] Reserved. 0
[Bytes 37 – 40] Reserved. 0
[Bytes 41 – 44] Chunk ID. 1000
[Bytes 45 – 48] Chunk length.