4.2.6 Trigger
The different trigger couplings are :
•
DC
•
AC
: cut off frequency is almost 10 Hz.
•
LF REJ
: single pole high pass filter with a cut off frequency at 50 kHz.
•
HF REJ
: single pole low pass filter with a cut off frequency at 50 kHz.
•
TBWL
: single pole low pass filter at 25 MHz.
Analog Controls
A sample and hold fed by the precision DAC provides the threshold level.
The addresses are :
TV Trigger
Each channel has a pick-off after the HFE428 or after the high impedance buffer for
external trigger. The TV trigger source is selected via bit TVS and drives a times 10
amplifier with complementary outputs. These outputs are selected ( _TVINV)
depending on the state of the selected HFE428 gain.
The TV trigger uses a commercial chip (LM1881) and provides two outputs,
TV1 & TV2. This circuit is able to trigger on different TV line number standards.
4.2.7 Analog to Digital Converter
Introduction
The analog to digital converter system does the signal conversion to 8 bits, using
the following circuits:
•
HAM435
: Hybrid Acquisition Module, Sample&Hold plus ADC
MSH437
: Monolithic Sample and Hold. performs the track&hold before the ADC.
MAD422
: Analog to Digital converter, maximum clock speed of 500 Ms/s
•
HMM436
: Hybrid Memory module, up to 4 Mbytes per Channel
MAM 424
: Monolithic Access Memory
•
MNX427
: Monolithic MIN-MAX
•
Buffer Memory
: 16Mbytes
•
HSY430
: Interleaving Channel
Theory of Operation
4-17
Содержание LC564DL
Страница 12: ...x Table of Contents ...
Страница 18: ...2 4 General Information ...
Страница 46: ...4 22 Theory of Operation 4 6 2 Power Supply Block Diagram ...
Страница 59: ...Performance Verification 5 13 ...
Страница 70: ...5 24 Performance Verification ...
Страница 95: ...Performance Verification 5 49 ...
Страница 115: ...Performance Verification 5 69 ...
Страница 122: ...5 76 Performance Verification Figure 5 14 1MΩ Ω Ω Ω Rise time Equipment Setup ...
Страница 148: ...6 14 Maintenance 6 6 4 Fan Problem ...
Страница 149: ...6 6 5 Power Supply Voltages Problem Maintenance 6 15 ...
Страница 150: ...6 16 Maintenance 6 6 6 Display Problem ...
Страница 151: ...6 6 7 Front Panel Controls Do not Operate Maintenance 6 17 ...
Страница 152: ...6 18 Maintenance 6 6 8 Remote Control GPIB or RS232 Problem ...
Страница 153: ...6 6 9 Performance Verification Fails Maintenance 6 19 ...
Страница 154: ...6 20 Maintenance 6 6 10 Floppy Disk Drive Problem ...
Страница 155: ...6 6 11 Graphic Printer Problem Maintenance 6 21 ...
Страница 156: ...6 22 Maintenance 6 6 12 Centronics Problem ...
Страница 157: ...6 6 13 Hard Disk Drive Problem Maintenance 6 23 ...
Страница 158: ...6 24 Maintenance ...
Страница 181: ...Mechanical Parts 8 1 8 Mechanical Parts Figure 8 1 LC564DL Cabinet ...
Страница 182: ...8 2 Mechanical Parts Figure 8 2 LC564DL Chassis Assembly ...
Страница 184: ...8 4 Mechanical Parts Figure 8 3 Power Supply Installation ...
Страница 185: ...Mechanical Parts 8 5 Figure 8 4 Lower Cover Assembly ...
Страница 187: ...Mechanical Parts 8 7 Figure 8 5 Lower Cover Assembly with CKTRIG Option ...
Страница 188: ...8 8 Mechanical Parts Figure 8 6 Lower Cover ...
Страница 190: ...8 10 Mechanical Parts Figure 8 7 CKTRIG Option ...
Страница 191: ...Mechanical Parts 8 11 Figure 8 8 Rear Panel Assembly ...
Страница 193: ...Mechanical Parts 8 13 Figure 8 9 900079 Main Board Assembly ...
Страница 194: ...8 14 Mechanical Parts Figure 8 10 900079 Main Board Assembly ...
Страница 196: ...8 16 Mechanical Parts Figure 8 11 Upper Shield Assembly ...
Страница 197: ...Mechanical Parts 8 17 Figure 8 12 Front Frame Assembly ...
Страница 199: ...Mechanical Parts 8 19 Figure 8 13 Keypad Assembly ...
Страница 200: ...8 20 Mechanical Parts Figure 8 14 Fan Assembly ...
Страница 202: ...8 22 Mechanical Parts Figure 8 15 Graphic Printer Assembly ...
Страница 203: ...Mechanical Parts 8 23 Figure 8 16 Upper Cover Assembly ...
Страница 205: ...Mechanical Parts 8 25 Figure 8 17 Hard Disk Assembly ...
Страница 206: ...8 26 Mechanical Parts Figure 8 18 Centronics VGA Interface Assembly ...
Страница 207: ...Mechanical Parts 8 27 Figure 8 19 Floppy Disk Assembly ...
Страница 209: ...Mechanical Parts 8 29 Figure 8 20 LC564DL Dimensions ...
Страница 210: ...8 30 Mechanical Parts Figure 8 21 LC564DL Packaging ...