SCA3000 DEMO KIT
User Manual
9.1
Checking and setting correct USB driver Latency timer value
The FTDI USB Virtual Serial Com Port driver is delivered with the CMA3000 demo kit and the same
driver version can be also downloaded from VTI's website. This driver is a slightly modified version
of the original FTDI's driver: the driver used with VTI's demos must have a modified Latency timer
setting. If the original FTDI's driver version is used, the demo may not work properly.
In order to modify the driver's Latency timer value, please plug the demo USB cable in to PC and
follow the steps (and screen captures) below:
1. Open control panel and select “SYSTEM”
2. Select “DEVICE MANAGER” from “HARDWARE” tab
3. Select “USB SERIAL PORT” from the list, right mouse click and select
“PROPERTIES"
4. Select “ADVANVED” from the USB Serial port Properties
5. Set the “LATENCY TIMER” to 5 ms (the 16ms default value is too slow for SCA3000
DEMO KIT).
6. Press “OK” to all windows.
7. Restart the GUI software.
Start
→
Settings
→
Control panel
1.
2.
VTI Technologies Oy
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