Tektronix 11302A Service Reference Manual page 5

Contents
Part 27 - Delta Delay Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2- 97
Part 28 - Probe Skew Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-98
Part 29 - Vertical High Frequency Response ...................... . ........................... 2- 99
Vertical High Frequency Gain ... . ................ .. ........ . .. . .. . . . .... .. ........... . . 2- 100
Vertical Step Response ..... . ............ . ........ . .................................... 2-102
Counter View Step Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2- 104
Vertical Amplifier Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-106
Counter View Step Response Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-112
Part 30 - Vertical/Measurement Accuracy .................................................... 2- 114
Part 31 -Trigger Filters .................. .. . . ............ .. .......... ... ....... ... ... . .. . . 2-116
Part 32- Trigger Noise and Sensitivity ....................................................... 2-118
Part 33 - Trigger Sensitivity .. ____ . ___ __ .. _ .. __ ... . __ ... ___ .. _. _ .... _. _ .... __ .... __ .... __ _ . _ 2-119
Trigger Sensitivity Adjustment: Main ... __ . ______ .... _____ .. ___ . _. _. ___ .. ____ . ______ . __ __ 2-121
Trigger Sensitivity Adjustment: Delayed .............................................. _ ... 2-122
Part 34 - Trigger Accuracy ...... . . . . ................ .. ................................. _. _. 2-123
Internal T rigger Accuracy ........ . .... . . .. ............. . ... . ..... . .......... . ...... . .. . 2-123
External T rigger Accuracy ................ . ... . ........... . ..... .. ... . ..... .. .......... 2-124
External Counter T imer Trigger Accuracy . .. . .. .. . .. . .. .. .. . .. .. . .. . .. .. . .. . .. .. . .. .. . .. . 2-125
Part 35- Line Trigger ...... . ... . . . .. . ....... . ....... . ........ . ..... . ...................... 2-126
Part 36 - Center Compartment
X-Axis Accuracy .............................
. ................ 2-127
Part 37 - Rear Panel Input/Output Signals ................ . ................ .. ................ 2-129
Part 38 - Coun ter Referen ce Clock In/Out ................................................... 2-132
Part 39- Frequen cy Accuracy ..... . ..... .. .... . . . . . .............•...... .. ........ . ......... 2- 134
Part 40 - External A and B Input Sensitivity ............. .. ...... .. ........................... 2-135
Part 41 - 2
ns
Holdoff . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-136
Part 42 - Holdoff By Events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-137
Part 43- Time Interval Using Sweeps ...... . ................................ .. ... .. ..... . ... 2- 138
Part 44 - Minimum Time Interval . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-139
Part 45- Video Trigger ... . ......... . .. . ......... ... ............... . ...... . .. .. ...... ... .. 2-140
Part 46 - Store Cal Constants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . • . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2- 142
Part 47- Reset DIP Switches and Set Time/Date . . .. .. . .. ........ .. ..... . ..... .. .......... . ... 2-143
Section 3- Maintenance
Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Cabinet Panel Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . • . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3- 1
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . • . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Exterior ..... . ....... . ......... . .. . .. . .... . ............ . ............................... 3-2
CRT ............................. .. ...... .... ................. . ........... .. .......... 3-2
Interior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Visual Inspection .. . ....... . . .. ..... . ...................................... . . .. ...... .. .. .... 3-3
Periodic Electrical Adjustment .............. . . . . . ..... . ... . ...................... . ........... . 3-3
Con-ective Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Power Supply Voltage Hazard ......... . ....... . ........................ .. . . .... . . . ...... .. .... 3-4
Ordering Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Static-Sensitive Device Classification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3- 5
Removing and Rep lacing FRUs ..... .. ....... . .. .. ... .. ............. . ...... .. ...... , . . ....... . . 3-7
E lectrical Lock-On of the ON/STANDBY Power Switch . .. .... . .......... .. ....... .. ........ . .... 3-8
Power Supply Module Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12
Fan Motor Removal ........ .. ..... . ........................ . ................ . .............. 3-14
Cath ode-Ray Tu be Removal .. . ......................... . .... .. ............................ . . 3-15
Cathode-Ray Tube Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18
1l302A Service Reference
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