Buffer
Var gain
Full BW
200 MHz
Buffer
Buffer
20 MHz
3
2
1
D
out
Overload
Differential
outputs
HF cal input
Input from 50 Ohm path
Input from 1MOhm path
Var Gain
Digital Interface
D
in
2
3
DC Loop In
DC Loop Out
Figure 4-10: HFE653 Block Diagram
4.6.3.5
Amplifier Signal Path
– The following diagrams illustrate the signal
path taken during the various different scope input coupling and input
attenuation modes:
4.6.3.5.1
Power Off State
–
+
-
HFE653
A
B
C
To trigger
20 db
RL1
RL4
RL2
RL8
÷10
÷10
AC / DC
Isolation Relay
Used during Cal
HF Cal Signal
50
50
50 Ohm Offset
Var Gain
1 MOhm Offset
DAC
Relay
Control
1 MOhm Offset
50 Ohm Offset
Var Gain
6
Channel Input
Serial Bus
To ADC
To ADC
RL6
RL3
3 db
50 Ohm / Hi-Z
Thermal
Link
Thermal
Reference
Overload
- 5V
+ 5V
Hi-Z
buffer
buffer
RL1
÷10
boost
cap
U15
Q11
Q2 &
Q1
Figure 4-11 Front End Power Off State Block Diagram
Theory of Operation
4-15
Summary of Contents for WAVERUNNER 6000 SERIES
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Page 22: ...This page intentionally left blank 3 6 Specifications ...
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Page 84: ...5 42 Performance Verification WR6K Rev D 5 42 Performance Verification WR6K Rev D ...
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Page 129: ...Figure 6 3 View of the power supply adjustment locations Maintenance 6 33 ...
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Page 261: ...Figure 8 27 Dimensions Mechanical Parts 8 27 ...
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Page 318: ...LeCroy Rackmount Kit for the 6000series ...