1-2
IM 707281-01E
1.2
System Configuration and Block Diagram
System Configuration
The following shows an example in which a 4-CH D/A Module WE7281 is installed in the
measuring station and the measuring station is connected to the PC through the optical
fiber cable.
Optical fiber cable
WE7281
PC
Optical interface card
Measuring station
Optical interface
module
Waveform output
Device receiving
waveform output
Download arbitrary
waveform data
Block Diagram
WE Bus
WE Bus
interface
Module control
Program
Flash memory
Waveform
memory
Data
processor
Data processing
program
memory
Isolation
D/A
Programmable
LPF
ATT
Output amp
CH1
CH2
CH3
CH4
The data processor on the module creates and processes the waveform data according
to instructions from the PC that are received via the WE bus of the measuring station.
The waveform data passes through the isolator. Then, they are converted to analog
values using the D/A converters of each channel. The programmable LPF, that is
optimized according to the waveform, removes the high frequency components. Then,
the ATT adjusts the level of the signal according to the output range, and then finally the
output amplifier outputs the analog signal. The isolators of each channel are independent,
and each channel is isolated from one another.