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1A4: Difference between revisions
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Type 1A4 is a 1-series vertical plug-in for [[Main_Page#500_Series|500-series scopes]]. | {{Plugin Sidebar | | ||
It has four input channels and | title=Tektronix 1A4 | | ||
summary=50 MHz quad input amplifier plugin | | |||
image=1a4 front.jpg | | |||
caption=Tektronix 1A4 front | | |||
years=1967 - 1974 | | |||
introduced=1967 | | |||
discontinued=1974 | | |||
series=[[500-series scopes]] | | |||
manuals= | |||
* [http://bama.edebris.com/manuals/tek/1a4 1A4 manual on BAMA] | |||
}} | |||
The '''Tektronix Type 1A4''' is a 1-series vertical plug-in for [[Main_Page#500_Series|500-series scopes]]. | |||
It has four input channels and 50 MHz bandwidth. | |||
The four channels are grouped into two groups of two channels. | The four channels are grouped into two groups of two channels. | ||
Type 1A4 has a special "trace slaving" mode which, | Type 1A4 has a special "trace slaving" mode which, | ||
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This allows high-speed and low-speed signals to be displayed together, | This allows high-speed and low-speed signals to be displayed together, | ||
similar to what a dual-beam scope can do, but without some of the cost and complexity. | similar to what a dual-beam scope can do, but without some of the cost and complexity. | ||
Maximum channel sensitivity is | |||
Maximum channel sensitivity is 10 mV/div, | |||
but a Signal Out jack makes it possible to cascade two channels | but a Signal Out jack makes it possible to cascade two channels | ||
for approximately | for approximately 200 μV/div AC with about 20 Hz - 1 MHz bandwidth. | ||
Like the Type [[1A2]] and unlike the Type [[1A1]], | Like the Type [[1A2]] and unlike the Type [[1A1]], | ||
the Type 1A4 has a Trigger Output selector that controls | the Type 1A4 has a Trigger Output selector that controls | ||
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The signal path of each channel of the 1A4 is as follows. | The signal path of each channel of the 1A4 is as follows. | ||
First the signal passes through the attenuators. | First the signal passes through the attenuators. | ||
Then it is clamped by two diodes and applied the the gate of a JFET source follower. | Then it is clamped by two diodes and applied to the the gate of a JFET source follower. | ||
The source of the source follower is the trigger pickoff point. | The source of the source follower is the trigger pickoff point. | ||
From there the vertical signal path goes through an NPN emitter follower | From there the vertical signal path goes through an NPN emitter follower | ||
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After the multiplexer network, the signal passes through a common base amplifier | After the multiplexer network, the signal passes through a common base amplifier | ||
followed by [[6DJ8]] tube operating in common grid configuration. | followed by [[6DJ8]] tube operating in common grid configuration. | ||
Type 1A4 was [[introduced in 1967]] and lasted until the end | Type 1A4 was [[introduced in 1967]] and lasted until the end | ||
of the [[Main_Page#500_Series|500-series line]] in 1974. | of the [[Main_Page#500_Series|500-series line]] in 1974. | ||
==Specifications== | |||
[[Category:Specifications needed]] ''please add'' | |||
==Pictures== | |||
<gallery> | <gallery> | ||
Image:1a4 front.jpg | Image:1a4 front.jpg | ||
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Image:1a4 bottom.jpg | Image:1a4 bottom.jpg | ||
</gallery> | </gallery> | ||
[[Category:500 series plugins]] | |||