PCI-DDA Series

What you describe as a “trigger” is what we call a “clock”, or more specifically an external clock. The PCI-DDA series has only a memory depth of one sample per channel, and does not offer trigger or clocking capability. Therefore it will not meet your stated needs. The D/A channels on many of our multi-function PCI DAQ devices, such as the PCI-DAS6014, offer both FIFO memory and external clock capability. The D/A channels on many of our multi-function DAQ devices (such as the USB-1208HS-2AO/4AO, and USB-1608GX-2AO) do so as well, plus they add external trigger capability. Our software drivers for these devices allow you to create an array of data points in advance, and specify that they will be paced out (i.e. one output per edge) by an external TTL signal.

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Thank you for your inquiry. The PCI-DDA08/16 is not capable of generating waveforms at a 200KHz update rate because the DACs are software paced. That is, they are updated via software and not hardware paced with a clock. The speed will be determined by the speed of your PC, the overhead of your operating system, and the timing of your program. Here are a few of the products that are capable of generating a 200K waveform: USB-1208HS-4AO, USB-1616HS-4 and the USB-2627. All of these devices have support for 4 analog outputs (so you would need to use two devices) but they’re all capable of an update rate of 1 MHz/channel.

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