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{{Oscilloscope Sidebar |
{{Oscilloscope Sidebar  
title=Tektronix 468 |
|manufacturer=Tektronix
summary=10/100 MHz Digital Storage Scope |
|series=400-series scopes
image=468-am.jpg |
|model=468
caption=Tek 468 |
|summary=10/100 MHz Digital Storage Scope
introduced=1980 |
|image=468-am.jpg
discontinued=1985 |
|caption=Tek 468
manuals=
|introduced=1980
* [http://www.ko4bb.com/getsimple/index.php?id=manuals&dir=Tektronix/Tektronix_-_468_Digital_Storage_Oscilloscope Tektronix 468 manuals]
|discontinued=1985
}}
|designers=
The '''Tektronix 468''' is a digital/analog scope, essentially a [[465B]] with an added 25 MS/s 8 bit digitizer.
|manuals=
* [[Media:070-2906-01.pdf|Tektronix 468 Operators Manual]]
* [[Media:070-3515-00.pdf|Tektronix 468 Service Manual Vol.1]] (OCR)
* [[Media:070-3516-00.pdf|Tektronix 468 Service Manual Vol.2]] (OCR)


==Specifications==
* [https://www.ko4bb.com/getsimple/index.php?id=manuals&dir=Tektronix/Tektronix_-_468_Digital_Storage_Oscilloscope Tektronix 468 manuals] @ KO4BB
* Digital mode: Sampling rate 25 MS/s, bandwidth 10 MHz (sine)/2.5 MHz (pulse), resolution 8 bit
* [https://www.hakanh.com/dl/docs/kitinstructions/040-0999-02.pdf GPIB Option Installation]
* Analog mode: 100 MHz bandwidth
* GPIB option
* ''please add more'' ... [[Category:Specifications needed]]


==Repair issues==
{{ROM Images}}
Many 468s used Mostek MKB36000 masked ROMs that can suffer from "ROM rot". It may be necessary to replace the 160-0459-01 and 160-0759-01 ROMs with 2764 EPROMs through a 2364/2764 adapter.
Another option might be using the [[MCM68766]] EPROM.
 
<gallery>
468_new_rom.jpeg | replaced ROM by 2764 with homemade 2364/2764 adapter
468_fail_rom.jpg | Result of bad ROM by verification-check.
</gallery>
'''ROM images'''
* [[Media:160-0459-01.bin |160-0459-01 (U565)]]  
* [[Media:160-0459-01.bin |160-0459-01 (U565)]]  
* [[Media:160-0759-01.bin |160-0759-01 (U575)]]
* [[Media:160-0759-01.bin |160-0759-01 (U575)]]
* [[Media:067-0989-00.bin |067-0989-00 Service ROM]]
* [[Media:067-0989-00.bin |067-0989-00 Service ROM]]
}}
The '''Tektronix 468''' is a digital/analog scope, essentially a [[465B]] with a 25 MS/s, 8-bit digitizer added.
The 468 is controlled by an [[Intel 8085]]A processor.


{{BeginSpecs}}
{{Spec | Bandwidth      | 100 MHz analog, 10 MHz digital repetitive, 2.5 MHz digital single-shot }}
{{Spec | Deflection      | 5 mV/Div to 5 V/Div, 1–2–5; CH1-CH2 cascaded – 1 mV/Div, 50 MHz }}
{{Spec | Sweep          | 20 ns/Div to 50 ms/Div (B) or 500 ms/Div (A), 1–2–5, ×10 magnifier to 2 ns/Div }}
{{Spec | Sampling rate  | 25 MS/s }}
{{Spec | Resolution      | 8 bit }}
{{Spec | Input impedance | 1 MΩ // 20 pF }}
{{Spec | Z Axis          | 5 V<sub>p-p</sub> (max. 25 V DC+peak AC) into 25 kΩ (down to 200 Ω at 2 MHz and above), 50 MHz }}
{{Spec | CRT            | [[154-0731-00]], 8×10 cm², P31 [[phosphor]], 18.5 kV acceleration (–2.45 kV / +16 kV) }}
{{Spec | Power          | 90–210 V, 108–132 V, 198–242 V or 216–250 V; 48–440 Hz; 115 W/140 VA, max. 150 W/190 VA }}
{{Spec | Dimensions      | 18.3 cm × 29.2 cm × 55 cm (H×W×D) }}
{{Spec | Weight          | 15 kg (33 lb) }}
{{EndSpecs}}
<small>
===Options===
* Opt.02 − GPIB (A17 board)
* Opt.04 − EMI shielding
* Opt.05 − TV Sync Separator (A29 board)
* Opt.11 − Analog X-Y/Plotter Output (A27 board)
* Opt.12 − Averaging - Standard on SN B032430 and up
</small>


A16 STORAGE-DISPLAY Circuit Board Replacement ERROR in SERVICE Manual Schematic and Parts list (See Repairs)
==Repair issues==
→ see [[468/Repairs]] page


==Links==
==Links==
* [https://youtu.be/bgbY4Ca_imU Tektronix 468 Repair by VintageTek Museum]
* [https://youtu.be/bgbY4Ca_imU Tektronix 468 Repair Vol.1] / [https://www.youtube.com/watch?v=4y8q0wbZ71U Vol.2] / [https://www.youtube.com/watch?v=hf1qhx3JNRY HV multiplier/CRT replacement] by vintageTek Museum @ YouTube
* [http://www.amplifier.cd/Test_Equipment/Tektronix/Tektronix_other/468/468.html Tektronix 468 @ amplifier.cd]
* [https://www.amplifier.cd/Test_Equipment/Tektronix/Tektronix_other/468/468.html Tektronix 468 @ amplifier.cd]
{{Documents|Link=468}}


==Pictures==
==Pictures==
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Test468.jpg
Test468.jpg
468 front.JPG|front
468 front.JPG|front
468 top.JPG|top
468 top.JPG|top and A16
468 right.JPG|right
Top Digital.JPG|Storage & Display A16
468 left.JPG|left
468 right.JPG|right Trigger A12
468 bottom.JPG|bottom
468 left.JPG|left V Preamp A11
468 bottom.JPG|bottom Interface Board A15
468 back.JPG|rear
468 back.JPG|rear
Storage Boards.JPG|Processor Board Set
CPU Board.JPG|Microprocessor Board A21
Memory Board A18.JPG|Memory Board A18 (TRW part on the right is the [[TRW TDC1007|TDC1007 A/D converter]])
Timebase - PS A22.JPG|Timebase/Power Supply A22
Timebase A22.JPG|Timebase Oscillator A22
Tek_468_A17_GPIB_Option_A2.jpg|A17 GPIB OPT A2
</gallery>
</gallery>
==Components==
{{Parts|468}}


[[Category:400 series scopes]]
[[Category:400 series scopes]]
[[Category:Digital storage scopes]]
[[Category:Digital storage scopes]]
[[Category:GPIB interface]]
[[Category:GPIB interface]]

Revision as of 06:07, 15 December 2023

Tektronix 468
10/100 MHz Digital Storage Scope
Tek 468

Produced from 1980 to 1985

Manuals
ROM Images
File Pos. Checksum
067-0989-00.bin Service (repl. U565) e7a227f3
160-0459-01.bin U565 5d9decc9
160-0759-01.bin U575 65850940
(All manuals in PDF format unless noted otherwise)
Manuals – Specifications – Links – Pictures

The Tektronix 468 is a digital/analog scope, essentially a 465B with a 25 MS/s, 8-bit digitizer added.

The 468 is controlled by an Intel 8085A processor.

Key Specifications

Bandwidth 100 MHz analog, 10 MHz digital repetitive, 2.5 MHz digital single-shot
Deflection 5 mV/Div to 5 V/Div, 1–2–5; CH1-CH2 cascaded – 1 mV/Div, 50 MHz
Sweep 20 ns/Div to 50 ms/Div (B) or 500 ms/Div (A), 1–2–5, ×10 magnifier to 2 ns/Div
Sampling rate 25 MS/s
Resolution 8 bit
Input impedance 1 MΩ // 20 pF
Z Axis 5 Vp-p (max. 25 V DC+peak AC) into 25 kΩ (down to 200 Ω at 2 MHz and above), 50 MHz
CRT 154-0731-00, 8×10 cm², P31 phosphor, 18.5 kV acceleration (–2.45 kV / +16 kV)
Power 90–210 V, 108–132 V, 198–242 V or 216–250 V; 48–440 Hz; 115 W/140 VA, max. 150 W/190 VA
Dimensions 18.3 cm × 29.2 cm × 55 cm (H×W×D)
Weight 15 kg (33 lb)

Options

  • Opt.02 − GPIB (A17 board)
  • Opt.04 − EMI shielding
  • Opt.05 − TV Sync Separator (A29 board)
  • Opt.11 − Analog X-Y/Plotter Output (A27 board)
  • Opt.12 − Averaging - Standard on SN B032430 and up

Repair issues

→ see 468/Repairs page

Links

Documents Referencing 468

Document Class Title Authors Year Links
Tekscope 1980 V12 N2.pdf Article New Products 1980
Tekscope 1980 V12 N3.pdf Article 100 MHz Portable Oscilloscope Packs Digital Storage Power Bruce Blair 1980

Pictures

Components

Some Parts Used in the 468

Part Part Number(s) Class Description Used in
154-0731-00 154-0731-00 154-0731-01 154-0731-02 154-0731-04 CRT CRT Telequipment D75 455 465 465B 468
155-0022-00 155-0022-00 155-0022-01 Monolithic integrated circuit analog multiplexer 147 148 149 335 468 1430 1441 1461 1900 1910 2220 2221 2230 5223 5403 5440 5441 5443 5444 5A38 7313 7403N 7503 7504 7514 7603 AN/USM-281C 7613 7623 7623A 7633 7704 R7704 7704A 7834 7844 7854 R7912 7912AD 7912HB 7904 R7903 7904A 7934 7A12 7A18 7A18A 7A18N 7B52 7B53N 7D10 7D11 7D12 NT-7000 P7001
155-0078-00 155-0078-xx 155-0273-00 155-0274-00 Monolithic integrated circuit broadband amplifier 464 465 466 468 475 475A 475M 485 7834 7844 7854 7904 R7903 R7912 7912AD 7912HB 7104 7A16A 7A16P 7A24 7A26 7A42 067-0587-01 067-0680-00 AM503 PG502 PG508 DC510 DC5010 FG5010
155-0115-00 155-0115-00 Hybrid integrated circuit vertical amplifier 335 464 465 465B 466 468
Intel 8085A 156-1088-00 Monolithic integrated circuit 8-bit microprocessor 308 468 4025 7A42 7D02 AFG5101 AFG5102 PFG5105
Mostek MK36000 Monolithic integrated circuit 8K×8 mask-programmable ROM 468 7854 FG5010
TRW TDC1007 156-1345-00 Monolithic integrated circuit 8-bit, 20 MSPS flash A/D converter 468