NI USB-6000 User Guide | © National Instruments | 11
Connecting Analog Input Signals
To connect voltage signals to the NI USB-6000, connect the positive voltage signal to an
AI terminal, and the ground signal to an AI GND terminal, as shown in Figure 6.
Figure 6. Connecting a Referenced Single-Ended Voltage Signal
Signals of ±10 V at any analog input pin with respect to AI GND are accurately measured.
Beyond ±10 V, the input signal will begin clipping as shown in Figure 7. Typically, this clipping
begins at ±10.5 V.
Figure 7. Exceeding ±10 V on AI Returns Clipped Measurement Result
AI
NI USB-6000
AI GND
Voltage
Source
20
–20
–15
–10
–5
0
Amplitude (V)
5
10
15
AI 1
Result