Appendix A
Device-Specific Information
A-26
ni.com
DAQPad-6020E Block Diagram
Figure A-22 shows a block diagram of the DAQPad-6020E.
Figure A-22.
DAQPad-6020E Block Diagram
Connecting Signals to the DAQPad-6020E BNC
Analog Input
You can use each analog input BNC connector for one differential signal or
two single-ended signals.
Differential Signals
To connect differential signals, determine the type of signal source you are
using: a floating signal source or a ground-referenced signal source. Refer
to the
Differential Connection Considerations
sections of Chapter 2,
, for more information.
To measure a floating signal source, move the switch to the FS position. To
measure a ground-referenced signal source, move the switch to the GS
Timing
PFI / Trigger
I/O Connector
4
USB Connector
Exter
nal P
o
w
er
Digital I/O (8)
12-Bit
Sampling
A/D
Converter
EEPROM
Configuration
Memory
+
NI-PGIA
Gain
Amplifier
–
Calibration
Mux
Mux Mode
Selection
Switches
Analog
Muxes
Voltage
REF
Calibration
DACs
Dither
Circuitry
6
Calibration
DACs
5 V
Supply
DAC0
DAC1
1 A Fuse
DAQ - STC
Analog Input
Timing/Control
Analog Output
Timing/Control
Digital I/O
Trigger
Counter/
Timing I/O
Interrupt
Request
Bus
Interface
(8)
(8)
1
2
AI Control
Analog
Input
Control
EEPROM
Control
DAQ-PnP
DAQ-STC
Bus
Interface
Analog
Output
Control
Bus
Interface
Bus
Interface
USB
Port
USB Micro
Controller
Interrupt
Request
EEPROM
Control
IRQ
AO Control
Data (16)
Data (16)
Data
Transceivers
ADC
FIFO
Содержание PCI-6034E
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