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Appendix G
USB 2.0 Limitations
The following information covers the currently known limitations associated with
operating under the USB 2.0 interface.
Maximum cable length is 5 meters (16.4 feet)
1 MHz is currently the upper digitization rate limit for the ST-133 Controller.
Large data sets and/or long acquisition times may be subject to data overrun
because of host computer interrupts during data acquisition.
USB 2.0 is not supported by the Princeton Instruments PC Interface Library (EZ-
DLLS).
Some WinX (WinView/32 and WinSpec/32) 2.5.X features are not fully
supported with USB 2.0. See the table below.
Supported with USB 2.0 in
WinX 2.5.X
Reset Camera to NVRAM
Defaults
WinX 2.5.x doesn’t utilize
hardware lock status
Not all header info is
currently available in
WinX 2.5.x through
PVCAM
Table 15. Features Supported under USB 2.0 (continued on next page)