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DDS2.1-W/150-D
AOGND是模擬輸出通道的接地參考信號(hào)。
DAC<0。。7> OUT和EXTREF都引用到AOGND。
外部參考信號(hào)可以是直流或交流信號(hào)。這個(gè)
設(shè)備將此參考信號(hào)乘以DAC代碼，再除以
滿標(biāo)度DAC代碼，用于生成輸出電壓。
圖4-2顯示了如何將模擬輸出連接到
裝置
圖4-2：。模擬輸出連接
數(shù)字輸入/輸出信號(hào)連接
數(shù)字輸入/輸出信號(hào)為DIO<0。。7> 和DGND。DIO<0。。7> 是
構(gòu)成DIO端口的信號(hào)，DGND是地面參考信號(hào)
對(duì)于DIO端口。您可以將所有行單獨(dú)編程為輸入或
輸出。
警告：超過表4-2中列出的大輸入電壓額定值，可能
損壞設(shè)備和計(jì)算機(jī)。國(guó)家文書不承擔(dān)責(zé)任
此類信號(hào)連接導(dǎo)致的任何損壞。

AOGND is the ground reference signal for the analog output channels. DACOUT as well as EXTREF is referenced to AOGND. The external reference signal can be either a DC or an AC signal. The device multiplies this reference signal by the DAC code, divided by the full-scale DAC code, to generate the output voltage. Figure 4-2 shows how to make analog output connections to the device. Figure 4-2. Analog Output Connections Digital I/O Signal Connections The digital I/O signals are DIO and DGND. DIO are the signals making up the DIO port, and DGND is the ground reference signal for the DIO port. You can program all lines individually to be inputs or outputs. Caution Exceeding the maximum input voltage ratings, which are listed in Table 4-2, can damage the device and the computer. National Instruments is NOT liable for any damages resulting from such signal connections.