34 quTAG MC Manual www.qutools.com
9 FAQ / Trouble Shooting
9.1 USB Driver Version
Windows only:
The software doesn't find any device.
The software claims "Wrong version of USB Driver installed".
The quTAG is using an USB chip of FTDI. The Software works with FTDI's driver
version 1.2. In the meantime, FTDI published version 1.3 which breaks the
Software (we are convinced that the version is buggy but were not able to
settle that with FTDI).
The quTAG software installer is installing 1.2, but Windows sometimes
updates to 1.3 autonomously. We don't know when and why that happens
but it has sometimes been observed directly after installing the quTAG
Software. This applies to Windows 7, 8, and 10.
The driver version 1.3 has to be removed and replaced by 1.2.
To remove, open the device manager, click the device ("FTDI Bridge Device" or
"quTAG R3") and disable the driver. Select the option "remove driver from PC"
(or similar). Sometimes Windows offers an option "return to old driver version"
(or similar) - that also works.
Then install again the Software package, the previous installation hasn't to be
removed.
The Daisy software warns that the firmware version doesn't match the
software version.
In many cases new software packages come along with new firmware files.
The software can work correctly only if the matching firmware is installed.
Call the flasher tool "nhflash(.exe)" of the new software package and press
"Flash" to update the firmware.
The time differences between events happening on different input channels
are systematically wrong by some nanoseconds.
quTAGs input signals have slightly different interal runtimes. The "signal
delay" function is used to compensate that as well as external runtime
differences. On delivery, the delays are not calibrated.
To remove the runtime difference between two channels, connect them with
input signals of known pulse distance and adjust the signal runtime until the
quTAG reproduces the known value.
To Next Page
Loading...