Tektronix TAS 475 - Page 6

Table of Contents
Compensating the Probe ................................ .
Menu Map .............................................. .
2-5
2-8
•
Theory of Operation
Circuit Description ......................................... .
3-1
Logic Conventions ...................................... .
3-1
Module Interconnection ................................. .
3-1
Analog Board . .......................................... .
3-4
Attenuators A 1 ....................................... . 3-4
Probe Coding Interface A1 ............................ .
3-4
Analog Acquisition Hybrid A1 .......................... . 3-4
Processor System ...................................... . 3-4
Processor Subsystem A5 .............................. .
3-4
ROM/RAM Subsystem A5 ............................. . 3-5
Readout Subsystem A5
............................... .
3-5
Front-Panel Interface Subsystem A5 .................... . 3-5
Analog Board Interface Subsystem A5 .................. . 3-5
Display Assembly . ...................................... .
3-5
Vertical Output A3 .................................... . 3-6
Horizontal Output A3 ................................. .
3-6
High
Voltage A3 ...................................... . 3-6
Front
Panel ............................................. .
Menu Switches A4 .................................... .
3-6
•
3-6
CPU A4 ............................................. . 3-7
FPP Pots & Probes A4 ................................ . 3-7
LEDs
& Driver A4 ..................................... . 3-7
Switches A4
......................................... . 3-8
Low
Voltage Power Supply .............................. . 3-8
Fan .................................................... . 3-8
Performance Verification
General Instructions ........................................ . 4-1
Using the Brief Performance Checks Procedures . ......... . 4-1
Using the Performance Tests Procedures ................. . 4-1
Conventions ............................................ . 4-2
Brief Performance Checks .................................. . 4-3
Power-On Self Tests ..................................... . 4-3
Functional Tests ........................................ .
4-3
Functional Tests Prerequisites .......................... .
4-4
Verify the Probe Compensator Output .................. .
4-4
Verify the Input Channels .............................. .
Verify the Alt/Chop and Add Functions .................. .
4-5
•
4-6
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