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© National Instruments Corporation 2-1 NI 5911 User Manual
2
Hardware Overview
This chapter includes anoverview of the NI 5911, explains the operation of
each functional unit making up your NI 5911, and describes the signal
connections. Figure 2-1 shows a block diagram of the NI 5911.
Figure 2-1. NI 5911 Block Diagram
Differential Programmable Gain Input Amplifier (PGIA)
The analog input of the NI 5911 is equipped with a differential
programmable gain input amplifier. The PGIA accurately interfaces to and
scales the signal presented to the analog-to-digital converter (ADC)
regardless of source impedance, source amplitude, DC biasing, or
common-mode noise voltages.
Protect/
Calibration
Mux
Calibration
Generator
PGIA
Noise
Shaper
Reference
Clock
Data
A/D Converter
100 MHz, 8-Bit
Digital Signal
Processor
Digital IO
Connector
Analog Input
Connector
AC/DC Coupling
Capture
Memory
Timing IO/
Memory Control