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{{Oscilloscope Sidebar|
{{Instrument Sidebar
title=Tektronix 1240|
|class=Logic Analyzer
image=Tek1241 front.jpg|
|manufacturer=Tektronix  
caption=Tektronix 1241 |
|model=1240
introduced=1983 |
|summary=Modular Logic Analyzer
discontinued=(?) |
|image=Tek1241 front.jpg
summary=Modular Logic Analyzer |
|caption=Tektronix 1241  
manuals=
|introduced=1984 (1240), 1986 (1241)
* [http://w140.com/070-4342-01_1240svcVol1_Jan87.pdf 1240 Service Manual Vol.1]
|discontinued=1993
* [http://w140.com/070-4717-01_1240svcVol2_Oct88.pdf 1240 Service Manual Vol.2]
|designers=
* [http://w140.com/tek_1241_service.pdf 1241 Service Manual (PDF)]
|manuals=
* [[Media:070-4641-00.pdf|1240 quick start guide]]
* [[Media:070-4340-01.pdf|1240 and 1241 Operator's manual -01]]
* [[Media:070-4340-00.pdf|1240 and 1241 Operator's manual -00]]
* [[Media:070-4342-01.pdf|1240 Service Manual Vol.1]]
* [[Media:070-4717-01.pdf|1240 Service Manual Vol.2]]
* [[Media:070-5378-00.pdf|1241 Service Manual addendum]]
* [[ROM images#1240|ROM images]]
* [[ROM images#1240|ROM images]]
}}
}}
 
The '''Tektronix 1240''' is a logic analyzer, introduced in 1984. The '''1241''' is the same device but with a color-shutter CRT, it was introduced in 1986.
The '''Tektronix 1240''' is a logic analyzer. The '''1241''' is the same device but with a color-shutter CRT.


==Specifications==
==Specifications==
The 1240/1241 accommodate one to four acquisition boards of type '''1240D1''' with 9 channels or '''1240D2''' with 18 channels
The 1240/1241 accommodate one to four acquisition boards of type [[1240D1]] with 9 channels or [[1240D2]] with 18 channels
for a total of up to 72 acquisition channels.  Acquisition speeds reach up to 100 MHz asynchronous or 50 MHz synchronous.
for a total of up to 72 acquisition channels.  Acquisition speeds reach up to 100 MHz asynchronous or 50 MHz synchronous.
The 1240/41 provides 14 levels of triggering with conditional branching.  
The 1240/41 provides 14 levels of triggering with conditional branching.  


Exchangeable ROM cartridges allow for mnemonic disassembly and state analysis of most microprocessors of the time.
There are two cartridge interfaces. 
 
The rear slot is for I/O devices; three were produced.  The [[1200C01]] is the RS232C Comm pack.  The [[1200C02]] is the GPIB comm pack.  The [[1200C11]] is the parallel printer comm pack.  It required the [[12RC01]] Printer Support ROM pack. 
 
The cartridge slot interface on the side of the instrument was memory specific and was for ROM and RAM packs.  Both 8K and 64K RAM packs with battery backup were made, note that the battery is a potential HazMat made by Catalyst Research and may destroy the cartridge when it leaks.  There were also ROM packs (12RMXX series) that allow for mnemonic disassembly and state analysis of most microprocessors of the time.  The ROM packs were made with a generic PCB that had two socketed ROMs and jumpers to select the size.


An optional "Comm Pack" provides a serial port including remote control capabilities.
See the [[Microprocessor support table]] for processor configuration options.


There is a design for a multipurpose RAM/ROM pack, called [[Making_1200_series_cartridges|SuperPack]] by Pavel Korensky.  Note the errata in the [[Media:Tek1240-SPDesign10.ZIP|README file]].
It uses either [[P6460]] (general purpose) or [[P6462]] (TTL) 9-channel probes.
==Internals==
==Internals==
The 1240 is built around an Intel 8088 as the control processor with 64K DRAM, and firmware in a bank of EPROMs. A separate I/O processor board is powered by a Z80A CPU. The display controller is built from individual TTL and ECL ICs.
The 1240 is built around an [[Intel 8088]] as the control processor with 64K DRAM, and firmware in a bank of EPROMs.  


The power supply is a switch-mode supply that mainly generates 5 V at up to 45 A. It requires a minimum load of 11.6 A. Additionally it generates 3 V at up to 8 A with no minimum load and several other voltages that are derived from linear post regulators.
A separate I/O processor board is powered by a [[Zilog Z-80]]A CPU. The display controller is built from individual TTL and ECL ICs.
 
The power supply is a switch-mode supply that mainly generates 5 V at up to 45 A. It requires a minimum load of 11.6 A.  
Additionally it generates 3 V at up to 8 A with no minimum load and several other voltages that are derived from linear post regulators.


Boards are two to six layers.
Boards are two to six layers.
The CPU board has battery backed up RAM to save the current configuration and one user configuration. 
This battery is a lithium iodide cell.  It will eventually fail and leak, damaging the PCB. 
The battery is visible on the picture for the A09 processor board.
==See Also==
* [[Time Stamp]]


==Links==
==Links==
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* [https://www.youtube.com/watch?v=wKR-EUWTZDc Video] showing basic operation  
* [https://www.youtube.com/watch?v=wKR-EUWTZDc Video] showing basic operation  
* [https://www.youtube.com/watch?v=jq-5DeFpxUM Video] showing GPIB implementation
* [https://www.youtube.com/watch?v=jq-5DeFpxUM Video] showing GPIB implementation
* [http://spurtikus.de/2016/03/30/der-logik-analysator-tektronix-1241/ Teardown of a 1241] nice pictures, but the site is in German.


== Pictures ==
== Pictures ==
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Tek 1240 state view.jpg| 1240 state table view
Tek 1240 state view.jpg| 1240 state table view
Tek 1240 timing diagram view.jpg| 1240 timing diagram view
Tek 1240 timing diagram view.jpg| 1240 timing diagram view
65021240.JPG| 6502 Disassembly


Tek 155-0270-00 from 1240.jpg    | Tek [[155-0270-00]] probe data interface hybrid (one of three)
Tek 155-0270-00 from 1240.jpg    | Tek [[155-0270-00]] probe data interface hybrid (one of three)
Line 69: Line 93:
Tek 1240 A15 D1.jpg              | A15 1240D1 9-channel board
Tek 1240 A15 D1.jpg              | A15 1240D1 9-channel board
Tek 1240 A15 D1 back.jpg        | A15 1240D1 9-channel board (rear side)
Tek 1240 A15 D1 back.jpg        | A15 1240D1 9-channel board (rear side)
Tek 1241 state view.jpg| 1241 State Table View
Tek 1240 D2.JPG                  | 1240D2
Tek1240-1200C02.jpg              | 1200C02 GPIB COMM PACK
Tek1240-rompack.jpg              | ROM PACK
Tek 1241 state view.jpg         | 1241 State Table View
1240D1.jpg                      | 1240D1
1240D2.jpg                      | 1240D2
Tek 1240 accessory 1.jpg        |
Tek 1240 accessory 2.jpg        |
Tek 1240 accessory 3.jpg        |
Tek 1240 accessory 4.jpg        |
Tek 1240 accessory 5.jpg        |
</gallery>
</gallery>


[[Category:Logic Analyzers]]
{{Plugins|1240}}
 
[[Category:Logic analyzers]]
[[Category:Introduced in 1984]]
[[Category:Parallel printer interface]]
[[Category:RS-232 interface]]
[[Category:GPIB interface]]
Retrieved from "https://w140.com/tekwiki/wiki/Special:MobileDiff/32274...78793"

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