Technical information

AVT GigE camera attributes
AVT GigE Camera and Driver Attributes V1.3.1
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This document is a master document for all AVT GigE camera models and is NOT camera specific
PtpStatus – Enum – R
State of the PTP operation.
StreamBytesPerSecond – Uint32 – 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 StreamBytesPerSecond
parameter does not exceed the data rate of the GigE port. Setting the parameter
in this way will ensure that multiple camera situations work without packet col-
lisions, i.e. data loss.
Master This device’s TimeStampValue is the master clock. All other PTP
enabled slave devices synchronize their clock to this camera
Auto This device uses the IEEE1588 best master clock algorithm to deter-
mine which device is master, and which are slaves. It may be
assigned as either. There may be several state transitions prior to
synchronization
Disabled
[Default] Device PtpMode is set to Off
Initializing
PTP is being initialized. If one camera / PTP device is being
initialized, all devices statuses are set to initializing. This
state appears very briefly
Listening
Device is listening for other PTP enabled devices. The purpose
of this state is to determine which device will act as master
Master
Device acting as master clock. If a better master clock is
determined, device will go to Listening, Uncalibrated, and
finally Slave
Passive
If there are 2 or more devices with PtpMode = Master, this
device has an inferior clock and is not synchronized to the
master
Uncalibrated
PTP synchronization not yet achieved. Slave(s) are synching
with master
Slave
PTP synchronization between this device and master is
achieved. Device is acting as a slave to another device‘s master
clock
Note

PTP capable cameras with firmware < 1.54.11026 have
PtpStatus = [Off, Master, Synching, Slave, Error].
Range: [1,000,000 – 124,000,000 (248,000,000 for GX in LAG mode)]
Units: Bytes/s