Question: I plug in the iUSBDAQ into a bus powered hub, and it does not seem to work? Answer: Don't use bus powered usb hub because it limits the current to max 100mA. You should use a self powered usb hub or directly connect the iUSBDAQ to usb ports in the computer.
Question: I plug in the iUSBDAQ into usb port, windows popup saying the driver for this hardware is not windows logo certified and followed by a warning message. Answer: Ignor this message, just hit "Install Anyway". Our USB driver comes from Microchip, our chip provider, it is safe even without windows logo certification which is not obligated.
Question: The streaming mode limits the minimum sampling rate to 128HZ, how do I do 1HZ sampling? Answer: For lower sampling rate, you can use single read mode, and you control the time interval to read, or oversampling with streaming mode. In next version of iUSBDAQ.dll, we will automatically handle this, not leave this task to end users.
Question: How do I use the PWM outputs to generate analog outputs? Answer: Microchip has a very good application note about turning PWM outputs to analog outputs. Please check out this link: AN538 – Using PWM to generate analog output
Question: The PWM outputs high frequency pulse train. How do I generate low frequency pulse train? Answer: You can toggle digital I/O lines to generate low frequency pulse train. The DIO's update rate is 125HZ in iUSBDAQ.
Question: When I log a large amount of data (long time at higher sampling rate) and try to use the analysis tab in iDAQTest&Log application to load the logged data, it takes a long time to load. Answer: The iDAQTest&Log application allows to log data up to 10M samples, but actually, if you really log such big amount of data, your data file will be very large and it will take a long time to load and you may even have trouble to open a very large data file in Microsoft Excel. We would recommend log smaller data file so that you can easily load and analyze in iDAQTest&Log application.
Question:How do I make iUSBDAQ work under windows Vista? Answer: Steps to make HYTEK iUSBDAQ working under Window's vista (32bit): 1. Install the software driver as usual. 2. Plug in the iUSBDAQ and follow the instruction to install the driver. When sucessful, the iUSBDAQ should show up in device manager under the "HytekUSBDAQ" category. 3.Right click on the iUSBDAQ in device manager and select "Property", go to Power Management tab, uncheck the "Allow the computer to turn off this device to save power". 4. Go to iDAQTest&Log Software install folder, right click on "iDAQTest&Log.exe" software, select "Property", go to "Compatibility" tab, check the box "Run this program in compatibility mode for", select "Windows XP (Service Pack2)" and also check the box "Run this program as an administrator". click on "Apply" and "OK".
Now the software and hardware should be compatible and running under the windows vista (32bit) version.
