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7M13: Difference between revisions
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{{Plugin Sidebar | {{Plugin Sidebar | ||
|manufacturer=Tektronix | |||
summary=Readout Unit | | |series=7000-series scopes | ||
image=Tek-7m13-front.jpg | |type=7M13 | ||
caption=7M13 front panel | | |summary=Readout Unit | ||
introduced=1974 | | |image=Tek-7m13-front.jpg | ||
discontinued=1985 | |caption=7M13 front panel | ||
|introduced=1974 | |||
manuals= | |discontinued=1985 | ||
* [[Media:070-1577-00.pdf|Tektronix 7M13 Manual]] (OCR | |manuals= | ||
* [[Media:070-1577-00.pdf|Tektronix 7M13 Manual]] (OCR) | |||
}} | }} | ||
The '''Tektronix 7M13''' is a "Readout Unit" that allows the user to enter text | 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. | into the [[7000 series readout system|scope's readout system]] for that module slot. | ||
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A built-in camera counter displays a pre-settable count in the second (lower) readout channel, | 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. | 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). | 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. | ||
To correct other errors, one needs to erase the display field. | |||
{{BeginSpecs}} | {{BeginSpecs}} | ||
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==Internals and Repair Issues== | ==Internals and Repair Issues== | ||
The 7M13 is relatively simple and robust electrically | 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 | 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, | The 7M13 uses four 7489 TTL 16×4 RAMs to store the characters entered, | ||
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One RAM and D/A each are assigned to row and column readout signals in each channel, | 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. | and are addressed by a counter synchronized to the readout time slot pulses. | ||
In other words, characters are not stored | 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]]. | 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 | The keyboard is arranged in a matching matrix of double-contact (DPST) keys | ||
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|align=right| $1,075 | |align=right| $1,075 | ||
|- | |- | ||
! | ! In 2022 Dollars | ||
|align=right| $ | |align=right| $2,300 | ||
|align=right| $ | |align=right| $2,200 | ||
|align=right| $ | |align=right| $2,200 | ||
|align=right| $ | |align=right| $3,100 | ||
|- | |- | ||
|} | |} | ||
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</gallery> | </gallery> | ||
{{Custom ICs|7M13}} | |||
[[Category:7000 series special-function plugins]] | [[Category:7000 series special-function plugins]] | ||