National Instruments NI 5401 Manuel D’Utilisation

Chapter 1

Generating Functions with the NI 5401

1-6

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Table 1-1 shows the pin names and signal descriptions used on the NI 5401 
digital output connector.

You can use an optional SHC50-68 50-pin to 68-pin cable for external 
trigger input. The cable connects to the digital connector on the NI 5401. 
Figure 1-5 shows the 68-pin connector pin assignments on the SHC50-68 
cable.

The SHC50-68 connector uses the same signals as the NI 5401 digital output 

connector shown in Table 1-1.

Table 1-1.  Digital Connector Signal Descriptions

DGND

–

Digital ground

EXT_TRIG

Input

External trigger—The external trigger input signal is a 
TTL-level signal that you can use to start or step through a 
waveform generation. For more information on trigger sources 
and trigger mode, see Chapter 2, 

.

NC

–

Not connected.

RFU

–

Reserved for future use. Do not connect signals to this pin.