Basler Pioneer User Manual page 97

Network Related Camera Parameters and Managing Bandwidth
Bandwidth Reserve (read/write)
Used to reserve a portion of the assigned bandwidth for packet resends and for the transmission of
control data between the camera and the host PC. The setting is expressed as a percentage of the
Bandwidth Assigned parameter. For example, if the Bandwidth Assigned parameter indicates that
30 MByte/s have been assigned to the camera and the Bandwidth Reserve parameter is set to 5%,
then the bandwidth reserve will be 1.5 MByte/s.
Bandwidth Reserve Accumulation (read/write)
A software device called the bandwidth reserve accumulator is designed to handle unusual
situations such as a sudden EMI burst that interrupts an image transmission. If this happens, a
larger than normal number of packet resends may be needed to properly transmit a complete
image. The accumulator is basically an extra pool of resends that the camera can use in unusual
situations.
The Bandwidth Reserve Accumulation parameter is a multiplier used to set the maximum number
of resends that can be held in the "accumulator pool." For example, assume that the current
bandwidth reserve setting for your camera is 5% and that this reserve is large enough to allow up
to 5 packet resends during a frame period. Also assume that the Bandwidth Reserve Accumulation
parameter is set to 3. With these settings, the accumulator pool can hold a maximum of 15 resends
(i.e., the multiplier times the maximum number of resends that could be transmitted in a frame
period). Note that with these settings, 15 will also be the starting number of resends within the
accumulator pool.
The chart on the next page and the numbered text below it show an example of how the
accumulator would work with these settings. The chart and the text assume that you are using an
external trigger to trigger image acquisition. The example also assumes that the camera is
operating in a poor environment, so many packets are lost and many resends are required. The
numbered text is keyed to the time periods in the chart.
Basler pioneer 87