4-18
Theory of Operation
4.2.8 Time Base
Introduction
The time base includes three circuits:
•
MCG426
: generates sampling clocks: 12.5 MHz up to 2GHz
generates clocks for the MTB411
interleaves sampling clocks to increase sampling rate and memory
depth.
•
MTB411A
: Time Base System
TDC interpolator and Real Time computation
Trigger circuitry
Frequency divider
•
MST429A
:
Single source trigger, Standard trigger, Hold off, Pulse width & interval
Multiple source trigger, State qualified, Edge qualified
Block
Diagram
MTB 411
MST 429
MCG 426
HSH & ADC
SHCK_A
SHCK_B
SHCK_C
SHCK_D
2
2
2
2
MCK
TRIG
TRIG
2
Peak
Detect
MPD
10 MHz
Reference
INTREF
PHDET
VCO
VCO2G
PDCK
2
2
2
RAMPST
R
A
M
PS
TRT
TRT
to trigger selection
SHCK_A
SHCK_B
SHCK_C
SHCK_D
Q
Q
D
ENABLE
TRIGEN
ITBUSY
MACQ
FDEND
FDCK
TR
IG
D
IT
C
K
TRIGD
ITCK
FDCK
FDEND
MACQ
INT
2
TBCK
TSCK
TSCK
TBCK
BCK
_ITMB
to uP
MEMORY
MCK
DIN[7..0]
EXTREF
EXTCK
EXTREF
EXTCK
2
RT
C
K
RTCK
S2EDGE
Vcc
MCLR
CLR
EN10MHZ
10MHZ
clock 10MHz
500MHZ
clock 500MHz
CONTROL
from uP
DIO(7:0) +
A(1:0) +
control
enable
clock 10MHz
Fig 4.12: Time Base Block Diagram
Summary of Contents for LC564DL
Page 12: ...x Table of Contents ...
Page 18: ...2 4 General Information ...
Page 46: ...4 22 Theory of Operation 4 6 2 Power Supply Block Diagram ...
Page 59: ...Performance Verification 5 13 ...
Page 70: ...5 24 Performance Verification ...
Page 95: ...Performance Verification 5 49 ...
Page 115: ...Performance Verification 5 69 ...
Page 122: ...5 76 Performance Verification Figure 5 14 1MΩ Ω Ω Ω Rise time Equipment Setup ...
Page 148: ...6 14 Maintenance 6 6 4 Fan Problem ...
Page 149: ...6 6 5 Power Supply Voltages Problem Maintenance 6 15 ...
Page 150: ...6 16 Maintenance 6 6 6 Display Problem ...
Page 151: ...6 6 7 Front Panel Controls Do not Operate Maintenance 6 17 ...
Page 152: ...6 18 Maintenance 6 6 8 Remote Control GPIB or RS232 Problem ...
Page 153: ...6 6 9 Performance Verification Fails Maintenance 6 19 ...
Page 154: ...6 20 Maintenance 6 6 10 Floppy Disk Drive Problem ...
Page 155: ...6 6 11 Graphic Printer Problem Maintenance 6 21 ...
Page 156: ...6 22 Maintenance 6 6 12 Centronics Problem ...
Page 157: ...6 6 13 Hard Disk Drive Problem Maintenance 6 23 ...
Page 158: ...6 24 Maintenance ...
Page 181: ...Mechanical Parts 8 1 8 Mechanical Parts Figure 8 1 LC564DL Cabinet ...
Page 182: ...8 2 Mechanical Parts Figure 8 2 LC564DL Chassis Assembly ...
Page 184: ...8 4 Mechanical Parts Figure 8 3 Power Supply Installation ...
Page 185: ...Mechanical Parts 8 5 Figure 8 4 Lower Cover Assembly ...
Page 187: ...Mechanical Parts 8 7 Figure 8 5 Lower Cover Assembly with CKTRIG Option ...
Page 188: ...8 8 Mechanical Parts Figure 8 6 Lower Cover ...
Page 190: ...8 10 Mechanical Parts Figure 8 7 CKTRIG Option ...
Page 191: ...Mechanical Parts 8 11 Figure 8 8 Rear Panel Assembly ...
Page 193: ...Mechanical Parts 8 13 Figure 8 9 900079 Main Board Assembly ...
Page 194: ...8 14 Mechanical Parts Figure 8 10 900079 Main Board Assembly ...
Page 196: ...8 16 Mechanical Parts Figure 8 11 Upper Shield Assembly ...
Page 197: ...Mechanical Parts 8 17 Figure 8 12 Front Frame Assembly ...
Page 199: ...Mechanical Parts 8 19 Figure 8 13 Keypad Assembly ...
Page 200: ...8 20 Mechanical Parts Figure 8 14 Fan Assembly ...
Page 202: ...8 22 Mechanical Parts Figure 8 15 Graphic Printer Assembly ...
Page 203: ...Mechanical Parts 8 23 Figure 8 16 Upper Cover Assembly ...
Page 205: ...Mechanical Parts 8 25 Figure 8 17 Hard Disk Assembly ...
Page 206: ...8 26 Mechanical Parts Figure 8 18 Centronics VGA Interface Assembly ...
Page 207: ...Mechanical Parts 8 27 Figure 8 19 Floppy Disk Assembly ...
Page 209: ...Mechanical Parts 8 29 Figure 8 20 LC564DL Dimensions ...
Page 210: ...8 30 Mechanical Parts Figure 8 21 LC564DL Packaging ...