Equipment information:

Tektronix 11801C Oscilloscope
Manufacturer:
Tektronix
Model: 11801C
Date:
Category: Measurement instruments
Group: Oscilloscope
Description: Digital Sampling Oscilloscope
Information:
                                    The Tektronix 11801C is a high-resolution digital sampling
oscilloscope accommodating up to eight input channels
through the dual-channel sampling heads. With the SD-24
TDR/Sampling Head, eight channels of singleended TDR or four
channels of differential TDR are available as well.
Features include the following:
■ sweep rates ranging from 5 ms/division to 1 ps/div
■ autoset to provide a suitably adjusted display for viewing
and further manual adjustment
■ windows for viewing expanded sections of a trace
■ self-tests to assure continuous accuracy of waveform data
and measurements
■ digital waveform storage and display
■ on-board measurement capabilities
■ menu-driven touch-screen operation
■ RS-232-C, GPIB, and PRINTER interfaces This section has
two main sub sections:

These manuals are available for the above equipment:

Tektronix -- 11801C -- Service Manual
File name: Tektronix-6459-Manual-Page-1-Picture
Manual Type: Service Manual
Pages: 286
Size: 2.33 Mbytes (2442693 Bytes)
Language: english
Revision:
Manual-ID/Number: 070-9972-02
Date:
Quality: Electronic document, no scan, very well readable.
Upload date:
MD5: eb5031e188be02a3ef10b98a041f19cc
ed2kID: 17d31d12778862dcea0b9b027b8260c3
Downloads: 72 since 23 November 2014
Information:
Contacting
Tektronix.............................................................................
i
General Safety Summary
...................................................................
xvii
Service Safety
Summary.....................................................................
xix
Specifications
Operating Information
Sampling Head Installation and Removal
...........................................2-2
Power Information
...................................................................................2-4
Power Cord
Information.........................................................................2-5
Memory Backup
Power...........................................................................2-6
Operating
Environment...........................................................................2-6
Operating Temperature
.....................................................................2-6
Ventilation
Requirements...................................................................2-6
Packaging for
Shipment.........................................................................2-7
Theory of Operation
System Functional Overview
.......................................................................3-3
Acquisition System Block
.....................................................................3-3
Strobe Distribution
Block.......................................................................3-3
Time Base/Controller
Block...................................................................3-3
Trigger Select
Block................................................................................3-3
Executive Processor Block
...................................................................3-4
Memory Management Unit
Block.........................................................3-4
Waveform Memory
Block.......................................................................3-4
Front Panel Controls
..............................................................................3-5
I/O
Block...................................................................................................3-5
Waveform Compressor and Display Control Block
........................3-5
Power Supply
..........................................................................................3-6
Typical Waveform Processing
Cycle...................................................3-6
Block Diagram
Descriptions...............................................................
3-7
A1 M/F Strobe Drive Board
.......................................................... 3-7
Data Buffers
...............................................................................
3-7
Address Latch
...........................................................................
3-7
Function Decoder
.....................................................................
3-7
Internal Clock Rate
Generator.................................................. 3-7
Control
Buffer.............................................................................
3-8
A3 M/F Power Connect
Board...................................................... 3-8
A4 Regulator
Board.......................................................................
3-8
Voltage Fault Detect
.................................................................
3-8
A5 Time Base/Controller Board
.................................................. 3-9
Microprocessor
.........................................................................
3-9
RAM/ROM
Memory...................................................................
3-9
Trigger........................................................................................
3-9
Time
Base..................................................................................
3-11
Acquisition System
Interface.................................................... 3-11
Memory Management (MMU)
Interface.................................. 3-11
A7 CRT Socket Board
...................................................................
3-12
Red, Green, and Blue Video
Amplifiers.................................. 3-12
Red, Green, and Blue Adjustments
........................................ 3-12
Convergence Adjustment
........................................................ 3-12
A8 CRT Driver
Board.....................................................................
3-13
Horizontal Sweep
.....................................................................
3-13
Vertical
Sweep...........................................................................
3-13
High Voltage and Grid Voltage Generator
............................. 3-13
Degauss
....................................................................................
3-14
Beam Current
Limit...................................................................
3-14
Grid
Bias....................................................................................
3-14
A9, A10, and A11 Front Panel
Boards........................................ 3-14
Touch Panel, Major Menu Keys, and Menu Status LEDs .... 3-14
A9 Touch Panel
Assembly........................................................
3-14
A10 Front Panel Control
Board................................................ 3-15
A11 Front Panel Button Board
................................................ 3-15
A12 Rear Panel Assembly
............................................................
3-15
GPIB Data and Address
Bus.................................................... 3-16
Standard RS-232-C Controller
................................................ 3-16
Printer Port
.................................................................................
3-17
A13 Mother Board
.........................................................................
3-17
A14 Input/Output (I/O) Board
...................................................... 3-18
I/O Data
Buffer...........................................................................
3-18
I/O Delayed Data
Buffer...........................................................
3-18
Timer Configuration
.................................................................
3-19
Real Time Clock
.......................................................................
3-19
Serial Data Interface (SDI)
........................................................ 3-19
Tone Generator
.........................................................................
3-19
Temp/Tone Readback
Buffer.................................................... 3-19
A15 Memory Management (MMU)
Board...........................................3-20
MMU
IC..............................................................................................3-20
Waveform RAM
.................................................................................3-20
Display Interface
...............................................................................3-20
Time Base/Controller Interface
........................................................3-21
Executive Processor (EXP)
Interface..............................................3-21
Display IC
..........................................................................................3-21
Microprocessor
.................................................................................3-21
Bit Map RAM
.....................................................................................3-21
Waveform Display RAM
...................................................................3-22
Video Digital-to-Analog Convertor (DAC)
.......................................3-22
A17 Executive Processor
Board..........................................................3-22
Executive Processor (EXP)
..............................................................3-22
Numeric Coprocessor
.....................................................................3-23
Bus Controller
...................................................................................3-23
Reset..................................................................................................3-23
Wait State
..........................................................................................3-23
Interrupt Controllers
.........................................................................3-23
DMA Controller
.................................................................................3-23
A18 Memory Board
...............................................................................3-24
Address Latches
...............................................................................3-24
Address Decode and Memory Select
............................................3-24
EPROMs, SRAM, and NVRAM
........................................................3-25
Memory Data Buffers
.......................................................................3-25
Wait State
Generator.........................................................................3-25
Wait State Diagnostics
.....................................................................3-25
Memory Configuration Readback
..................................................3-25
Battery Backup
.................................................................................3-25
A19 Strobe/TDR Buffer
Board..............................................................3-26
Strobe Sense
Select.........................................................................3-26
Strobe Deskew
.................................................................................3-26
TDR Buffer and Level
Shift................................................................3-26
A20-23 Head Interconnect
Boards......................................................3-26
A26 M/F Acquisition Interconnect
Board...........................................3-27
A24/A27 & A25/A28 Acquisition System
Boards.............................3-27
Programmable Gain
Amplifiers........................................................3-27
A/D Convertors
.................................................................................3-28
Measurement
Hardware...................................................................3-28
Timing and Sampling Head Control
..............................................3-28
Shared
RAM.......................................................................................3-29
Time Base/Controller Interface
........................................................3-29
Microprocessor
.................................................................................3-29
11801C Service
Test
Equipment...............................................................................
4-3
Test Record
...............................................................................
4-6
Using These Procedures
..............................................................
4-11
Conventions in this Manual
...................................................... 4-11
Menu Selections and Measurement
Techniques................... 4-11
User
Manual...............................................................................
4-11
Performance
Tests.................................................................................
4-13
Power-On Diagnostics
.................................................................
4-14
Setup to Invoke Power-On
Diagnostics.................................. 4-14
Procedure to Invoke Power-On
Diagnostics........................... 4-14
Diagnostics.................................................................................
4-15
Self-Test
Diagnostics.................................................................
4-15
Power-On Diagnostics
Complete............................................ 4-16
Sampling Heads
.............................................................................
4-17
Setup to Calibrate a Sampling
Head...................................... 4-17
Procedure to Calibrate a Sampling
Head............................... 4-17
Extended
Diagnostics...................................................................
4-19
Setup to Invoke Extended
Diagnostics.................................. 4-19
Procedure to Invoke Extended
Diagnostics........................... 4-19
Vertical Reference
Voltage............................................................
4-21
Specifications.............................................................................
4-21
Setup to Check Vertical Reference Voltage
........................... 4-21
Procedure to Check Vertical Reference Voltage
................... 4-21
Horizontal Reference
Clock..........................................................
4-23
Specifications.............................................................................
4-23
Setup to Check Horizontal Reference Clock
......................... 4-23
Procedure to Check Horizontal Reference Clock
................. 4-23
Vertical Accuracy
...........................................................................
4-25
Setup to Check Vertical Gain
.................................................. 4-25
Procedure to Check Vertical Gain
.......................................... 4-25
Setup to Check Offset
Accuracy.............................................. 4-28
Procedure to Check Offset
Accuracy...................................... 4-28
System Vertical RMS
Noise..........................................................
4-31
Setup to Examine Vertical RMS
Noise.................................... 4-31
Procedure to Examine Vertical RMS
Noise............................. 4-31
Sweep Rate
Accuracy...................................................................
4-34
Setup to Examine Sweep Rate
Accuracy............................... 4-34
Procedure to Examine Sweep Rate
Accuracy....................... 4-34
Sweep Rate Accuracy 2
ns/div................................................ 4-35
Sweep Rate Accuracy 1
ns/div................................................ 4-36
Sweep Rate Accuracy 100
ps/div............................................ 4-36
Sweep Rate Accuracy 10
ps/div.............................................. 4-36
Sweep Rate Accuracy 1
ps/div................................................ 4-37
Triggering, External
Direct...................................................................4-39
Specifications....................................................................................4-39
Setup to Check
Triggering...............................................................4-39
Procedure to Check
Triggering.......................................................4-39
Prescaler Triggering
............................................................................4-41
Specifications....................................................................................4-41
Setup to Check Prescaler
Triggering.............................................4-41
Procedure to Check Prescaler
Triggering......................................4-41
Internal Clock
........................................................................................4-43
Measurement Limits
........................................................................4-43
Setup to Examine Internal Clock
...................................................4-43
Procedure to Examine Internal Clock
...........................................4-43
Calibrator Output
..................................................................................4-45
Measurement Limits
........................................................................4-45
Setup to Examine Calibrator Output
.............................................4-45
Procedure to Examine
Calibrator...................................................4-45
Adjustment
Test
Equipment...............................................................................
5-3
Using These Procedures
..............................................................
5-6
Conventions in this Manual
...................................................... 5-6
Menu Selections and Measurement
Techniques................... 5-6
User
Manual...............................................................................
5-6
Power Supply
.................................................................................
5-7
Measurement Limits
.................................................................
5-7
Setup to Examine Voltage Supply
.......................................... 5-7
Procedure to Examine Voltage
Supply.................................. 5-7
Setup to Examine/Adjust Voltage Reference
......................... 5-9
Procedure to Examine/Adjust Voltage Reference
................. 5-9
Setup to Examine/Adjust Regulator Reference
..................... 5-11
Procedure to Examine/Adjust Regulator Reference
............. 5-11
Display..............................................................................................
5-13
Measurement Limits
.................................................................
5-13
Setup to Examine/Adjust the
Display...................................... 5-14
Procedure to Examine/Adjust the
Display............................... 5-14
Real Time Clock
.............................................................................
5-20
Measurement Limits
.................................................................
5-20
Setup to Examine/Adjust Real Time
Clock............................. 5-20
Procedure to Examine/Adjust Real Time
Clock..................... 5-20
Preventive
Maintenance.......................................................................
6-1
Removing the Cabinet
Panels...................................................... 6-1
Cleaning the
Instrument...............................................................
6-2
Exterior
......................................................................................
6-2
CRT
............................................................................................
6-2
Interior........................................................................................
6-3
Visual Inspection
...........................................................................
6-3
Periodic Electrical
Adjustment....................................................
6-3
Corrective
Maintenance.......................................................................
6-5
Power Supply Voltage
Hazard...................................................... 6-5
Ordering
Parts.................................................................................
6-5
Static-Sensitive Device Classification
...................................... 6-6
Removing and Replacing FRUs
.................................................. 6-8
Electrical Lock-on of the Front Panel ON/STANDBY
Power Switch
...........................................................................
6-13
Power Supply Module
Removal/Replacement......................... 6-16
Fan Motor Removal/Replacement
.............................................. 6-19
Cathode Ray Tube (CRT) Removal/Replacement
................... 6-20
Acquisition Unit
Removal/Replacement..................................... 6-26
Battery Disposal and First Aid
.................................................... 6-27
Battery Disposal
.......................................................................
6-27
Emergency and First Aid Information
.................................... 6-28
FRU Board and Assembly Removal
.......................................... 6-29
A1 M/F Strobe Drive Board
...................................................... 6-31
A3 M/F Power Connect Board
................................................ 6-32
A4 Regulator Board
.................................................................
6-34
A5 Time Base/Controller Board
.............................................. 6-35
A7 CRT Socket Board and A8 CRT Driver Board
................. 6-37
A9 Touch Panel
Assembly........................................................
6-40
A10 Front Panel Control
Board................................................ 6-42
A11 Front Panel Button Board
................................................ 6-44
A12 Rear Panel Assembly
........................................................ 6-45
A13 Mother
Board.....................................................................
6-47
A14 Input/Output (I/O) Board
.................................................. 6-49
A15 Memory Management Unit (MMU)
Board....................... 6-51
A17 Executive Processor (EXP) Board
.................................. 6-53
A18 Memory
Board...................................................................
6-55
A19 Strobe/TDR Buffer
Board.................................................. 6-57
A20-A23 Head Interconnect Boards
.................................... 6-59
A26 M/F Acquisition Interconnect
Board................................. 6-61
A24/A27 Acquisition Analog Boards
...................................... 6-63
A25/A28 Acquisition MPU Boards
.......................................... 6-64
FRU IC Removal
.............................................................................
6-65
Serial Data Interface Integrated Circuits (“Slam-Pack” ICs)
.. 6-65
Firmware Integrated Circuits (“Dual In-Line Package” ICs) ..
6-68
Firmware Upgrade Procedure
................................................ 6-69
Cables and Connectors
...............................................................
6-75
Interconnecting Pins
.....................................................................
6-75
Coaxial-type End-Lead Connectors (Peltolas & SMB) ......... 6-75
Multi-Pin Connectors
...............................................................
6-75
Checks After FRU
Replacement.................................................. 6-77
Diagnostic Troubleshooting
...............................................................
6-79
Diagnostics
Overview...................................................................
6-79
Kernel
Diagnostics.........................................................................
6-80
Self-Test/Extended Diagnostics
.................................................. 6-81
Extended Diagnostics Menu Structure
.................................. 6-81
Extended Diagnostics Error Index
Codes............................... 6-81
Diagnostic
Menus...........................................................................
6-84
Diagnostic Menu
Hardcopy......................................................
6-85
Diagnostic Terminal Mode
(RS-232-C)...................................... 6-86
System Mode (GPIB & RS-232-C)
.............................................. 6-87
Battery Testing
...............................................................................
6-89
Clearing
NVRAM.............................................................................
6-90
Field Replaceable Unit (FRU)
Guide.......................................... 6-91
FRU Name Abbreviations
........................................................ 6-92
Component and Module Name
Abbreviations....................... 6-93
Executive Subsystem Error Index Codes
............................... 6-94
Display Subsystem Error Index Codes
.................................. 6-98
Time Base Processor Error Index Codes
............................... 6-100
Acquisition Processor Error Index
Codes............................... 6-102
Other
Troubleshooting.........................................................................
6-103
Power Supply
Module...................................................................
6-103
Module Troubleshooting
......................................................... 6-103
A4 Regulator
Board.......................................................................
6-103
CRT, A7 CRT Socket Board, or A8 CRT Driver Board
............ 6-104
Module Troubleshooting
......................................................... 6-104
A13 Mother Board
.........................................................................
6-104
Fuse
Testing.....................................................................................
6-105
Time Base Calibration Errors
...................................................... 6-108
Acquisition Calibration Errors
.................................................... 6-110
Options
Instrument Options
.......................................................................
7-1
Power Cord
Information...............................................................
7-2
11801C Service
Electrical
Parts......................................................................................
8-1
Diagrams
Replaceable Parts List
Replaceable
Parts.................................................................................
10-1
Parts Ordering Information
.......................................................... 10-1
Module
Replacement...............................................................
10-1
Firmware Replacement
........................................................... 10-1
Using the Replaceable Parts
List................................................ 10-2
Item Names
...............................................................................
10-2
Indentation
System...................................................................
10-2
Abbreviations.............................................................................
10-2
Tektronix-6459-Manual-Page-1-Picture
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