USB-1808 系列

Hello - The counter and encoder input channels on the USB-1808 series are single-ended only. For differential encoder inputs, you could consider using the USB-QUAD08, though it is physically much larger and does not have any analog channels.

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Both the USB-1808 and the USB-1808X support a per-channel sample rate. It is not an aggregate rate where by adding additional channels your sample rate is divided down by the number of channels in use. The USB-1808 supports a 50kS/sec/chan sample rate and the USB-1808X supports a 200kS/sec/chan sample rate.

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UL for Linux (uldaq) is compiled at time of installation onto your target computer. This way, it can be compatible with any processor, including ARM. It requires C/C++ compilers, make tool, and the development package for libusb. Ubuntu is supported.

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Our Universal Library imposes no limits in terms of the number of USB devices that are supported. A USB host controller can enumerate up to 127 USB devices. The main limiting factor is going to be the USB bus bandwidth. Each USB device takes up a certain amount of bandwidth. When sampling data from multiple devices at high sample rates the bandwidth can easily be exceeded. The faster you sample the more bandwidth is used. Unfortunately, there is no accurate way calculate how many MCC DAQ devices can be used at full speed without exceeding the USB bus bandwidth. It all comes down to the sample rate of ALL the connected DAQ devices. If you exceed the bus bandwidth and our driver cannot keep up with the data transfer, you will in turn receive an “Overrun” error. An overrun error states that data was lost because the computer (bus bandwidth) could not keep up with the DAQs sample rate. Lowering your sample rate can alleviate this error and allow for additional USB DAQ devices to be connected. Your PC may also have multiple USB host controllers, allowing for more MCC DAQ devices if you connect them to different host controller ports.

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The USB-1808 only supports digital triggering and digital pattern triggering. For help selecting a DAQ device with analog triggering. Please contact Sales Engineering at 1-800-234-4232 Ext-3

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Yes, the USB-1808 will support input signals spanning a frequency range from 0-25kHz. The USB-1808 supports a per channel software selectable sample rate from 0.023Hz up to 50kHz. We do not have any graphs representing the frequency response of the USB-1808. Please contact sales engineering at 1-800-234-4232 Ext-3 with any additional questions you may have regarding the USB-1808.

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The input resolution cannot be reduced. 18 bits is always returned for analog input data.

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Yes, the USB-1808 Series product is self-powered. It derives its power from the USB port. No external power source is required.

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Yes, the USB-1808 is supported. Although not listed under the supported hardware table. The support package provided by MathWorks is expected to work with any Measurement Computing DAQ hardware that supports analog input and analog output operations. Please visit https://www.mathworks.com/hardware-support/measurement-computing.html for details regarding the MATLAB Data Acquisition Toolbox.

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UL for LInux revision 1.1 officially supports Linux, Python and the Mac OSX. Additional information on the UL for Linux can be located here: https://www.mccdaq.com/daq-software/Ul-for-Linux-Support.aspx

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