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7A12 (view source)

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The Tektronix 7A12 is a 120MHz dual-trace vertical plug-in for [[7000-series scopes]].
{{Plugin Sidebar 2|
The 7A12 has relays in the signal path for the input attenuators. 
title=Tektronix 7A12 |
The relays are controlled by logic in the 7A12,
summary=120 MHz dual channel amplifier|
which is controlled by switches on the front panel of the 7A12.
image=7a12.jpg |
The 7A12 uses the [[155-0032-00]] as a gain stage and the [[155-0022-00]] for channel switching.
caption=7A12 front view|
 
introduced=1969 |
discontinued=1974 |
series=[[7000-series scopes]]|
manuals=
* [http://bama.edebris.com/download/tek/7a12/tek-7a12.pdf Tektronix 7A12 Manual (PDF)]
* [http://bama.edebris.com/download/tek/7a12/tek-7a12.pdf Tektronix 7A12 Manual (PDF)]
* [http://w140.com/smb/7a12_sm.pdf Tektronix 7A12 Manual (OCR, PDF)]
* [http://w140.com/smb/7a12_sm.pdf Tektronix 7A12 Manual (OCR, PDF)]
}}
The '''Tektronix 7A12''' is a 120 MHz dual-trace vertical plug-in for [[7000-series scopes]].
Switches on the front panel control [[miniature relays]] in the signal path,
such as those selecting input attenuators, through logic circuits.
It uses the [[155-0032-00]] as a gain stage and the [[155-0022-00]] for channel switching.
The 7A12 was designed by [[Roy Hayes]] (who also designed the [[3A3]] and [[3A8]] before leaving for HP Loveland in Jan 1971).
The Evaluation Engineer for the 7A12 was [[Peter Starič]], co-author of the book "Wideband Amplifiers" with Erik Margan.
{{BeginSpecs}}
{{Spec | Bandwidth | 120 MHz (79xx) / 105 MHz (77xx) / 55 MHz (74xx) }}
{{Spec | Deflection | 5 mV/Div to 5 V/Div (1–2–5), variable up to 12.5 V/Div }}
{{Spec | Input impedance | 1 MΩ // 24 pF }}
{{Spec | Maximum input | 5 V (0.5 W) − no damage below 10 V (2 W) }}
{{Spec | Timing | Delay difference between channels < 500 ps }}
{{Spec | Channel Isolation | At least 3000:1 at 75 MHz }}
{{Spec | Maximum Input Voltage | 350 V DC + Peak AC at 1 kHz or less}}
{{EndSpecs}}
==Links==
* [http://www.amplifier.cd/Test_Equipment/Tektronix/Tektronix_7000_series_amplifier/amplifier_7A12.htm 7A12 page @ amplifier.cd]
* [http://www.barrytech.com/tektronix/tek7000/tek7a12.html 7A12 page @ barrytech.com]
==Pictures==


<gallery>
<gallery>
File:Tek 7a12.jpg|Front view
7a12.jpg|Front view
File:Tek 7a12 attenuators.png|Attenuator schematic with relays
Tek 7a12.jpg|Front view
Tek 7a12 attenuators.png|Attenuator schematic with relays
Tek 7a12 amplifier pcb.jpg|7A12 Amplifier PCB
</gallery>
</gallery>
[[Category:7000 series vertical plugins]]
Retrieved from "https://w140.com/tekwiki/wiki/Special:MobileDiff/6163...51761"

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