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Table of Contents

TDS 420A, TDS 430A & TDS 460A Service Manual

iii

List of Figures

Figure 1--1: TDS 400A Dimensional Drawing 1--13...................

Figure 2--1: Map of Display Functions 2--8........................

Figure 4--1: Map of Display Functions 4--3........................

Figur e 4--2: Verifying Adjustments and Signal Path Compensation 4--6

Figure 4--3: Universal Test Hookup for Functional Tests 4--8.........

Figure 4--4: Initial Test Hookup 4--20..............................

Figure 4--5: Initial Test Hookup 4--23..............................

Figure 4--6: Initial Test Hookup 4--26..............................

Figure 4--7: Measurement of Analog Bandwidth 4--29................

Figure 4--8: Initial Test Hookup 4--31..............................

Figure 4--9: Measurement of Channel Delay 4--33....................

Figure 4--10: Initial Test Hookup 4--34.............................

Figure 4--11: Measurement of Accuracy — Long-Term and

Delay-Time 4--37............................................

Figure 4--12: Initial Test Hookup 4--38.............................

Figure 4--13: Initial Test Hookup 4--41.............................

Figure 4--14: Measurement of Trigger Sensitivity 4--43...............

Figure 4--15: Initial Test Hookup 4--45.............................

Figure 4--16: Confirming Au xiliary Triggering at Maximum

Triggering Frequency 4--46...................................

Figure 4--18: Initial Test Hookup 4--49.............................

Figure 4--19: Adjusting Sync Pulse Amp litude 4--51..................

Figure 4--20: Measurement of Video Sensitivity 4--52.................

Figure 4--21: Initial Test Hookup 4--54.............................

Figure 4--22: Measurement of Probe Compensator Limits 4--55........

Figure 4--23: Sine Wave Generator Leveling Equipment Setup 4--56....

Figure 4--24: Equipment Setup for maximum Amplitude 4--57.........

Figure 5--1: Hookup for Probe Compensation 5--10..................

Figure 5--2: Performing Probe Compensation 5--11..................

Figure 5--3: Proper and Improper Probe Compensation 5--12..........

Figure 5--4: Exposing the Inner Probe Tip 5--13.....................

Figure 5--5: Initial Test Hookup 5--13..............................

Figure 5--6: Exposing the Probe Body 5--16.........................

Tektronix TDS 420A Service Manual

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