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Difference between revisions of "1A2"

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The Tektronix 1A2 is a two-channel plug-in amplifier for 500-series scopes.  It provides a -3dB point of
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{{Plugin Sidebar 2|
50MHz in a 544, 546, or 547, and 50mV/div sensitivity. It uses a 7586 nuvistor at the front end as a cathode follower.
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title=Tektronix 1A2|
Then one input of an NPN differential amplifier is driven to produce a differential current-mode signal at
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summary=50 MHz dual channel amplifier|
the collectors.  Silicon diodes form an analog multiplexer that switches between the two inputs.
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image=Tek 1a2 new.jpg |
A cross-coupled pair of PNP transistors forms a multivibrator that generates the voltages that control
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caption=1A2 front view|
the diodes that select the input channel.
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introduced=1964 |
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discontinued=1975 |
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series=[[500-series scopes]]|
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manuals=
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* [http://w140.com/mmm/tek-1a2.pdf Tektronix 1A2 Manual (PDF)]
  
Type 1A2 was introduced in 1964 together with Types [[1A1]], [[543B]], [[545B]], [[544]], [[546]], and [[547]].
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* [[Media:070-0430-01.pdf|Tektronix 1A2 Manual (PDF, OCR, bad-OCR)]]
It was designed to replace the venerable Type [[CA]], while the Type [[1A1]] delivered
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* [[Media:Tek 1a2 notes.pdf|Tektronix 1A2 Notes (PDF, needs OCR)]]
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}}
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The '''Tektronix 1A2''' is a two-channel plug-in amplifier for [[500-series scopes]].
 +
It provides a −3 dB point of 50 MHz in a [[544]], [[546]], [[547]], or [[556]], and 50 mV/div sensitivity. 
 +
 
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The Type 1A2 was [[introduced in 1964]] together with Types [[1A1]], [[543|543B]], [[545|545B]], [[544]], [[546]], and [[547]].
 +
It was designed to replace the venerable [[CA|Type CA]], while the [[1A1]] delivered
 
ten times the sensitivity at a higher price and is able to lock channel 1 to Type [[547]]'s timebase A
 
ten times the sensitivity at a higher price and is able to lock channel 1 to Type [[547]]'s timebase A
 
and channel 2 to timebase B.  On the other hand, Type 1A2 can select which channel provides triggering
 
and channel 2 to timebase B.  On the other hand, Type 1A2 can select which channel provides triggering
when the mainframe is set to Plug-In mode.  They share some mechanical design, but the
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when the mainframe is set to Plug-In mode, for scopes having this feature ([[544]], [[546]], [[547]], [[549]], [[556]], late [[555]]).   
circuits have few details in common.
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 +
The 1A2 remained available until the [[500-series scopes|500-series scope line]] was discontinued.
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{{MissingSpecs}}
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==Internals==
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1A1 and 1A2 share some mechanical design, but the circuits have few details in common.
 +
 
 +
The 1A2 uses a [[7586]] [[nuvistor]] at the front end as a cathode follower.
 +
Then one input of an NPN differential amplifier is driven to produce a differential current-mode signal at the collectors.
 +
 
 +
Silicon diodes form an analog multiplexer that switches between the two inputs.
 +
A cross-coupled pair of PNP transistors forms a multivibrator that generates the voltages that control the diodes that select the input channel.
 +
 
 +
==Pictures==
 +
 
 +
<gallery>
 +
Tek 1a2 new.jpg
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Tek 1a2 front.jpg
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Tek 1a2 top.jpg
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Tek 1a2 rear.jpg
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Tek 1a2 left.jpg|1A2 right
 +
Tek 1a2 right.jpg|1A2 left
 +
Tek 1a2 top2.jpg|1A2 top
 +
Tek 1a2 bottom.jpg|1A2 bottom
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Tek 1a2 bottom2.jpg
 +
Tek 1a2 front2.jpg
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Tek 1a2 front3.jpg
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Tek 1a2 b1.jpg
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Tek 1a2 b2.jpg
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Tek 1a2 b3.jpg
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Tek 1a2 b4.jpg
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Tek 1a2 b5.jpg
 +
</gallery>
 +
 
 +
[[Category:500 series plugins]]

Latest revision as of 18:25, 14 June 2019

Tektronix 1A2
50 MHz dual channel amplifier
1A2 front view

Compatible with 500-series scopes

Produced from 1964 to 1975

Manuals
Manuals – Specifications – Links – Pictures

The Tektronix 1A2 is a two-channel plug-in amplifier for 500-series scopes. It provides a −3 dB point of 50 MHz in a 544, 546, 547, or 556, and 50 mV/div sensitivity.

The Type 1A2 was introduced in 1964 together with Types 1A1, 543B, 545B, 544, 546, and 547. It was designed to replace the venerable Type CA, while the 1A1 delivered ten times the sensitivity at a higher price and is able to lock channel 1 to Type 547's timebase A and channel 2 to timebase B. On the other hand, Type 1A2 can select which channel provides triggering when the mainframe is set to Plug-In mode, for scopes having this feature (544, 546, 547, 549, 556, late 555).

The 1A2 remained available until the 500-series scope line was discontinued.

Specifications

please add

Internals

1A1 and 1A2 share some mechanical design, but the circuits have few details in common.

The 1A2 uses a 7586 nuvistor at the front end as a cathode follower. Then one input of an NPN differential amplifier is driven to produce a differential current-mode signal at the collectors.

Silicon diodes form an analog multiplexer that switches between the two inputs. A cross-coupled pair of PNP transistors forms a multivibrator that generates the voltages that control the diodes that select the input channel.

Pictures