309Alvium USB Cameras User Guide V4.6.1
Performance and troubleshooting
Using the U3 mode
If you want to pause camera operation, you can use the U3 mode to reduce the
power consumption of Alvium USB cameras. For example, with
SuspendMode, the
remaining power consumption is ~ 16 mA.
In this section, you learn to change between operational mode and U3 mode by
DevicePowerSavingMode and host or backend commands.
The
DevicePowerSavingMode feature selects between standard power use and
various power saving modes, avoiding unexpected camera behavior:
Values Description
Disabled
The camera uses standard power (default).
StandbyMode
Camera functions are disabled to reduce power
consumption. However, the control channel is maintained
active: the camera can still be controlled by GenICam
features.
SuspendMode
Recommended
with Linux.
The camera is enabled to go into USB U3 power saving mode.
The Phy shuts the camera down.
The host must send a
DevicePowerSave command or a
respective backend command to the camera to apply
SuspendMode. The camera reboots itself. After reboot, all
camera settings are reset to default values,
DevicePowerSavingMode is reset to Default.
Table 158: Options for DevicePowerSavingMode
Please observe
The U3 mode is not supported for USB 2.x connections.
Using power saving modes
StandbyMode
Use
DeviceReset command to switch from StandbyMode back to Disabled for
standard power mode.
SuspendMode
• Using SuspendMode under Linux on page 310
• Using SuspendMode under Windows on page 311
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