National Instruments NI 6120 用户手册

© National Instruments Corporation

This appendix contains a list of commonly asked questions and their 
answers relating to usage and special features of the NI 6115/6120.

The NI 6115/6120 is a switchless and jumperless enhanced MIO device 
that uses the DAQ-STC for timing.

The DAQ-STC is the system timing control application-specific integrated 
circuit (ASIC) designed by NI and is the backbone of the NI 6115/6120 
device. The DAQ-STC contains seven 24-bit counters and three 16-bit 
counters. The counters are divided into the following three groups: 

•

AI—two 24-bit, two 16-bit counters

•

AO—three 24-bit, one 16-bit counters

•

General-purpose counter/timer functions—two 24-bit counters

The groups can be configured independently with timing resolutions of 
50 ns or 10

µs. With the DAQ-STC, you can interconnect a wide variety of 

internal timing signals to other internal blocks. The interconnection scheme 
is quite flexible and completely software configurable. New capabilities 
such as buffered pulse generation and equivalent time sampling are 
possible.

Maximum sampling rate is the fastest you can acquire data on the device 
and still achieve accurate results. The NI 6115 device has a maximum 
sampling rate of 10 MS/s. This sampling rate is at 10 MS/s regardless if 
1 or 4 channels are acquiring data. The NI 6120 has a maximum sampling 
rate of 800 kS/s.