7A12: Difference between revisions

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title=Tektronix 7A12 |
title=Tektronix 7A12 |
summary=120 MHz dual channel amplifier|
summary=120 MHz dual channel amplifier|
image=Tek 7a12.jpg |  
image=7a12.jpg |  
caption=7A12 front view|
caption=7A12 front view|
introduced=1969 |  
introduced=1969 |  
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}}
}}


The '''Tektronix 7A12''' is a 120 MHz dual-trace vertical plug-in for [[7000-series scopes]]
The '''Tektronix 7A12''' is a 120 MHz dual-trace vertical plug-in for [[7000-series scopes]].
The 7A12 has relays in the signal path for the input attenuators. 
The relays are controlled by logic in the 7A12, which is controlled by switches on the front panel of the 7A12.


The 7A12 uses the [[155-0032-00]] as a gain stage and the [[155-0022-00]] for channel switching.
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.


==Specifications==
The 7A12 was designed by [[Roy Hayes]] (who also designed the [[3A3]] and [[3A8]] before leaving for HP Loveland in Jan 1971).
[[Category:Specifications needed]] ''please add''
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==
==Links==
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<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]]
[[Category:7000 series vertical plugins]]

Revision as of 23:46, 28 September 2019

Template:Plugin Sidebar 2

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.

Key Specifications

Bandwidth 120 MHz (79xx) / 105 MHz (77xx) / 55 MHz (74xx)
Deflection 5 mV/Div to 5 V/Div (1–2–5), variable up to 12.5 V/Div
Input impedance 1 MΩ // 24 pF
Maximum input 5 V (0.5 W) − no damage below 10 V (2 W)
Timing Delay difference between channels < 500 ps
Channel Isolation At least 3000:1 at 75 MHz
Maximum Input Voltage 350 V DC + Peak AC at 1 kHz or less

Links

Pictures