468
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.
From Tekscope V12 N3 1980:
The program manager for the 468 is Luis Navarro. Tom Dagostino, project engineer up to design completion, designed the display system and scope interface. The author (Bruce Blair) became project engineer after design completion and also had design responsibility for the acquisition system and GPIB. The microprocessor system is the work of Dave Olsen, firmware project leader; Karen Walker assisted in firmware design. Len McCracken did the mechanical design.
Key Specifications
Bandwidth | 100 MHz analog, 10 MHz digital repetitive, 2.5 MHz digital single-shot |
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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
- Tektronix 468 Repair Vol.1 / Vol.2 / HV multiplier/CRT replacement by vintageTek Museum @ YouTube
- Tektronix 468 @ amplifier.cd
Documents Referencing 468
Document | Class | Title | Authors | Year | Links |
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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 |
Patents that may apply to 468
Page | Title | Inventors | Filing date | Grant date | Links |
---|---|---|---|---|---|
Patent US 4301360A | Time interval meter | Bruce W. Blair | 1979-10-25 | 1981-11-17 | 468 |
Pictures
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front
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top and A16
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Storage & Display A16
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right Trigger A12
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left V Preamp A11
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bottom Interface Board A15
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rear
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Processor Board Set
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Microprocessor Board A21
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Memory Board A18 (TRW part on the right is the TDC1007 A/D converter)
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Timebase/Power Supply A22
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Timebase Oscillator A22
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A17 GPIB OPT A2
Components
Some Parts Used in the 468
Part | Part Number(s) | Class | Description | Used in |
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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 • 5D10 • 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 |