LeCroy WaveSurfer 400 Series User Manual

4-10 Theory of Operation
4.2.5 Calibrator
The main functions of the Calibrator are:
• Probe calibration signal output.
• DC calibration signal output.
• Skew calibration signal output.
x1.5
Amplifier
CAL OUT LVL
CAL OUT
Fast rise square wave
Low-pass
Filter
DDS
Synthesizer
6dB
divider
DC Calibrator
Skew Calibrator
Attenuator
+/-40mV
CH2 CAL SIG
CAL OUT CLK
MUX
MUX
+/-400mV
ECLinPS Lite
2
DC signal for amplitude
CH1 CAL SIG
AD9850
2
125MHz clock
2
Comparator
+1V 1kHz
INT CAL REF
INT CAL
+/-4V
+/-6V
to CH1 - EXT Input
1kHz
Probe
Calibrator
+/-60mV
CH4 CAL SIG
6dB
divider
Probe Calibration signal
from Time Base
+/-600mV
CH3 CAL SIG
6dB
divider
DC Calibration signal
from Time Base
Figure 4-9 Calibrator Block Diagram
4.2.6 SCAN DAC
The main functions of the SCAN DAC are:
• 16 bit precision DAC with uP system.
• 24 analog control signal outputs.
• +/-4V dynamic range outputs.
• 16 ADC inputs for Probe sense, overload detection and so on.
4.2.7 MAIN BOARD CONTROL
The main functions of MAIN BOARD CONTROL are:
• 3 wire Serial Bus for serial device control.
• IIC Bus for EEPROM, Thermometer and ProBus system.
• 16 Analog control outputs using 10 bit DAC.
• 12 Analog control outputs using 8 bit DAC.
• Interface between Main Board and PIC Card.

LeCroy WaveSurfer 400 Series Specifications

General

Brand	LeCroy
Model	WaveSurfer 400 Series
Category	Test Equipment
Language	English