7M13: Difference between revisions

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{{Plugin Sidebar 2 |
{{Plugin Sidebar |
title=Tektronix 7M13 |
manufacturer=Tektronix | type=7M13 |
summary=Readout Unit |
summary=Readout Unit |
image=Tek-7m13-front.jpg  |  
image=Tek-7m13-front.jpg  |  
Line 6: Line 6:
introduced=1974 |
introduced=1974 |
discontinued=1985 |
discontinued=1985 |
series=[[7000-series scopes]]|
series=7000-series scopes|
manuals=
manuals=
* [http://w140.com/smb/7m13_sm.pdf Tektronix 7M13 Manual (OCR, PDF)]}}
* [[Media:070-1577-00.pdf|Tektronix 7M13 Manual]] (OCR, PDF)
}}


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.  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 through the a 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 [[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.


7M13 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.


{{BeginSpecs}}
{{BeginSpecs}}
Line 21: Line 27:
==Internals and Repair Issues==
==Internals and Repair Issues==


The 7M13 is relatively simple and robust electrically (consisting mostly of 74xx TTL logic), however, due to the number of switches, there can be electromechanical problems. For example, a 7M13 may appear unresponsive if the camera counter "(P)RESET" button is not fully released.
The 7M13 is relatively simple and robust electrically (consisting mostly of 74xx TTL logic),
however, due to the number of switches, there can be electromechanical problems.
For example, a 7M13 may appear unresponsive if the camera counter "(P)RESET" button 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 in ASCII bytes but in 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.
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 in ASCII bytes but in 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==
Line 56: Line 71:


<gallery>
<gallery>
File:Tek-7m13-front.jpg | 7M13 front panel
Tek-7m13-front.jpg | 7M13 front panel
File:Tek-7m13-right.jpg | 7M13, right side
Tek-7m13-right.jpg | 7M13, right side
File:7m13-7633.jpg | 7M13 in [[7633]]
Tek 7m13 b7.jpg | 7M13, left side
File:P6202-risetime-7s12-1ns.jpg | Readout example ([[7844]] Opt.78 mainframe)
P6202-risetime-7s12-1ns.jpg | Readout example ([[7844]] Opt.78 mainframe)
File:Tek 7m13 upper front.jpg
Tek 7m13 upper front.jpg
File:Tek 7m13 lower front.jpg
Tek 7m13 lower front.jpg
Tek 7m13 b1.jpg
Tek 7m13 b2.jpg
Tek 7m13 b2.jpg
Tek 7m13 b3.jpg
7m13-7633.jpg | 7M13 in [[7633]]
Tek 7m13 b4.jpg
Tek 7m13 b5.jpg
Tek 7m13 b6.jpg
Tek 7m13 b7.jpg
Tek 7m13 b8.jpg
</gallery>
</gallery>


{{Custom ICs|7M13}}


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

Revision as of 06:23, 16 August 2021

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, due to the number of switches, there can be electromechanical problems. For example, a 7M13 may appear unresponsive if the camera counter "(P)RESET" button 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 in ASCII bytes but in 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

Prices

Year 1974 1976 1980 1984
Catalog price $375 $425 $600 $1,075
2015 value $1,800 $1,760 $1,720 $2,440

Pictures

Custom ICs used in the 7M13

Page Model Part nos Description Designers Used in
155-0038-01 155-0038-01 155-0038-00 155-0038-01 5-bit current source D/A converter Mike Metcalf 7A42 7D13 7D14 7M13 T4005