468

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

Tektronix 468
10/100 MHz Digital Storage Scope Tek 468 Produced from 1980 to 1985 Manuals Tektronix 468 Operators Manual Tektronix 468 Service Manual Vol.1 Tektronix 468 Service Manual Vol.2 Tektronix 468 manuals @ KO4BB GPIB Option Installation ROM images 160-0459-01 (U565) 160-0759-01 (U575) 067-0989-00 Service ROM (All manuals in PDF format unless noted otherwise)

Manuals – Specifications – Links – Pictures

Specifications

Digital mode: Sampling rate 25 MS/s, bandwidth 10 MHz (sine)/2.5 MHz (pulse), resolution 8 bit
Analog mode: 100 MHz bandwidth
GPIB Option 02 (A17 board)
TV Sync Separator Option 05 (A29 board)
Analog X-Y/Plotter Output Option 11 (A27 board)

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Repair issues

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.

replaced ROM by 2764 with homemade 2364/2764 adapter
Result of bad ROM by verification-check.

A16 STORAGE-DISPLAY Circuit Board Replacement ERROR in SERVICE Manual Schematic and Parts list (See Repairs)

Links

Pictures

front
top and A16
Storage & Display A16
right Trigger A12
left V Preamp A11
bottom Interface Board A15
rear
Processor Board Set
Microprocessor Board A21
Memory Board A18
Timebase/Power Supply A22
Timebase Oscillator A22