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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 7854 • 468 • AA501 • SG505 • CG551AP • 1900 • 7612D
Tekscope 1980 V12 N3.pdf Article 100 MHz Portable Oscilloscope Packs Digital Storage Power Bruce Blair 1980 468

Pictures

  • front

    front

  • top and A16

    top and A16

  • Storage & Display A16

    Storage & Display A16

  • right Trigger A12

    right Trigger A12

  • left V Preamp A11

    left V Preamp A11

  • bottom Interface Board A15

    bottom Interface Board A15

  • rear

    rear

  • Processor Board Set

    Processor Board Set

  • Microprocessor Board A21

    Microprocessor Board A21

  • Memory Board A18 (TRW part on the right is the TDC1007 A/D converter)

    Memory Board A18 (TRW part on the right is the TDC1007 A/D converter)

  • Timebase/Power Supply A22

    Timebase/Power Supply A22

  • Timebase Oscillator A22

    Timebase Oscillator A22

  • A17 GPIB OPT A2

    A17 GPIB OPT A2

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
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