7M13: Difference between revisions

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{{Plugin Sidebar|
{{Plugin Sidebar  
title=Tektronix 7M13|
|manufacturer=Tektronix
summary=Readout Unit|
|series=7000-series scopes
image=7m13-manual-page.jpg|  
|type=7M13
caption=7M13 front panel|
|summary=Readout Unit
years=? – ?|
|image=Tek-7m13-front.jpg
type=Special Function|
|caption=7M13 front panel
series=[[7000-series scopes]]|
|introduced=1974
manuals=
|discontinued=1985
* [http://w140.com/smb/7m13_sm.pdf Tektronix 7M13 Manual (OCR, PDF)]}}
|manuals=
* [[Media:070-1577-00.pdf|Tektronix 7M13 Manual]] (OCR)
}}
The '''Tektronix 7M13''' is a "Readout Unit" that allows the user to enter text
into the [[7000 series readout system|scope's readout system]] for that module slot. 
It is intended to include identifying text and picture numbers for photographic documentation.
 
A built-in camera counter displays a pre-settable count in the second (lower) readout channel,
which can be advanced manually by push-button or automatically by the camera shutter.
The only editing function provided is to overwrite the character just entered (by holding the MODIFY button). To correct other errors, one needs to erase the display field.


The Tektronix 7M13 is a "Readout Unit" that allows the user to enter text into the scope's readout system for that module slot.  A built-in camera counter displays a presettable count in the second (lower) readout channel, which can be advanced manually by pushbutton or automatically through the a camera shutter.
{{BeginSpecs}}
{{Spec | Character positions | 2 fields (top, bottom) of 10 characters each }}
{{Spec | Camera counter | 0-99, lower field only; ground contact closure input }}
{{EndSpecs}}


It is intended to include identifying text and picture numbers for photographic documentation.
==Internals and Repair Issues==


==Specifications==
The 7M13 is relatively simple and robust electrically, consisting mostly of 74xx TTL logic.
However, there can be electromechanical problems due to the number of switches.
For example, a 7M13 may appear unresponsive if the "(P)RESET" button for the camera counter is not fully released.


The 7M13 uses four 7489 TTL 16×4 RAMs to store the characters entered,
and four [[155-0038-01]] Tek-made D/A converter chips to drive the analog row/column readout lines.
One RAM and D/A each are assigned to row and column readout signals in each channel,
and are addressed by a counter synchronized to the readout time slot pulses.
In other words, characters are not stored as ASCII bytes, but as row/column pairs
matching the [[Media:Tek7000-readout-charset.jpg|readout system's character set]].
The keyboard is arranged in a matching matrix of double-contact (DPST) keys
that generate the row/column coordinates through 74147 priority encoders.


==Links==
==Links==


* http://www.barrytech.com/tektronix/tek7000/tek7m13.html
* [http://www.amplifier.cd/Test_Equipment/Tektronix/Tektronix_7000_series_special/readout_unit_7M13.htm Tek 7M13 page @ amplifier.cd]
* [http://www.amplifier.cd/Test_Equipment/Tektronix/Tektronix_7000_series_special/readout_unit_7M13.htm Tek 7M13 page at amplifier.cd]
* [http://www.barrytech.com/tektronix/tek7000/tek7m13.html Tek 7M13 page @ barrytech.com]
{{Documents|Link=7M13}}
 
==Prices==
{| class="wikitable"
|-
! Year
! 1974
! 1976
! 1980
! 1984
|-
! Catalog price
|align=right|  $375
|align=right|  $425
|align=right|  $600
|align=right| $1,075
|-
! In 2022 Dollars
|align=right| $2,300
|align=right| $2,300
|align=right| $2,200
|align=right| $3,200
|-
|}


==Pictures==
==Pictures==


<gallery>
<gallery>
Tek-7m13-front.jpg | 7M13 front panel
Tek-7m13-right.jpg | 7M13, right side
Tek 7m13 b7.jpg | 7M13, left side
P6202-risetime-7s12-1ns.jpg | Readout example ([[7844]] Opt.78 mainframe)
Tek 7m13 upper front.jpg
Tek 7m13 lower front.jpg
Tek 7m13 b2.jpg
7m13-7633.jpg | 7M13 in [[7633]]
</gallery>
</gallery>


==Components==
{{Parts|7M13}}


[[Category:7000 series Special-function plugins]]
[[Category:7000 series special-function plugins]]
[[Category:Image needed]]
[[Category:Specifications needed]]

Latest revision as of 06:05, 12 October 2023

Tektronix 7M13
Readout Unit
7M13 front panel

Compatible with 7000-series scopes

Produced from 1974 to 1985

Manuals
(All manuals in PDF format unless noted otherwise)
Manuals – Specifications – Links – Pictures

The Tektronix 7M13 is a "Readout Unit" that allows the user to enter text into the scope's readout system for that module slot. It is intended to include identifying text and picture numbers for photographic documentation.

A built-in camera counter displays a pre-settable count in the second (lower) readout channel, which can be advanced manually by push-button or automatically by the camera shutter. The only editing function provided is to overwrite the character just entered (by holding the MODIFY button). To correct other errors, one needs to erase the display field.

Key Specifications

Character positions 2 fields (top, bottom) of 10 characters each
Camera counter 0-99, lower field only; ground contact closure input

Internals and Repair Issues

The 7M13 is relatively simple and robust electrically, consisting mostly of 74xx TTL logic. However, there can be electromechanical problems due to the number of switches. For example, a 7M13 may appear unresponsive if the "(P)RESET" button for the camera counter is not fully released.

The 7M13 uses four 7489 TTL 16×4 RAMs to store the characters entered, and four 155-0038-01 Tek-made D/A converter chips to drive the analog row/column readout lines. One RAM and D/A each are assigned to row and column readout signals in each channel, and are addressed by a counter synchronized to the readout time slot pulses. In other words, characters are not stored as ASCII bytes, but as row/column pairs matching the readout system's character set. The keyboard is arranged in a matching matrix of double-contact (DPST) keys that generate the row/column coordinates through 74147 priority encoders.

Links

Documents Referencing 7M13

Document Class Title Authors Year Links
Tekscope 1974 V6 N1.pdf Article CRT READOUT – Nicety or Necessity? 1974 7M13

Prices

Year 1974 1976 1980 1984
Catalog price $375 $425 $600 $1,075
In 2022 Dollars $2,300 $2,300 $2,200 $3,200

Pictures

  • 7M13 front panel

    7M13 front panel

  • 7M13, right side

    7M13, right side

  • 7M13, left side

    7M13, left side

  • Readout example (7844 Opt.78 mainframe)

    Readout example (7844 Opt.78 mainframe)

  • 7M13 in 7633

    7M13 in 7633

Components

Some Parts Used in the 7M13

Part Part Number(s) Class Description Used in
155-0038-01 155-0038-00 • 155-0038-01 Monolithic integrated circuit 5-bit current source D/A converter 7A42 • 7D13 • 7D14 • 7M13 • T4005
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