S-53: Difference between revisions

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{{Plugin Sidebar |
{{Plugin Sidebar 2|
title=Tektronix S-53 |
title=Tektronix S-53 |
summary=Trigger Recognizer |
summary=Trigger Recognizer |
image=S53-crop.jpg |
image=Tek-s53.jpg |
caption=S-53 head |
caption=S-53 head |
series=[[3S2]], [[7S11]], [[7S12]] Sampling Plugins |
series=[[3S2]], [[7S11]], [[7S12]] Sampling Plugins |
years=? – ? |
introduced=1971 |
discontinued=1989|
manuals=
manuals=
* [http://w140.com/tek_s53_oct1987.pdf Tektronix S-53 Manual (October 1987, good quality, PDF)]
* [http://w140.com/tek_s53_oct1987.pdf Tektronix S-53 Manual (October 1987, good quality, PDF)]
Line 12: Line 13:
* [http://w140.com/tek_s53_sch.png Tektronix S-53 Schematic (PNG)]
* [http://w140.com/tek_s53_sch.png Tektronix S-53 Schematic (PNG)]
}}
}}
The Tektronix S-53 '''Trigger Recognizer''' is essentially the entire trigger circuit of an oscilloscope.   
The Tektronix S-53 '''Trigger Recognizer''' head can be used in the right bay of the [[7S12]] TDR/Sampler plug-in
or externally in a type [[285]] enclosure. It essentially contains the entire trigger circuit of an oscilloscope.   
 
{{BeginSpecs}}
{{Spec | Bandwidth | 1 GHz }}
{{Spec | Input impedance | 50 Ω [[BNC connector]] }}
{{Spec | Sensitivity | 10 mV to 1 V (p-p) }}
{{Spec | Jitter | max. 15 ps or less (from input signal to trigger-out) }}
{{Spec | Delay | 15 ns (from input signal to trigger-out) }}
{{Spec | Trigger-out signal | 1 V into 50 Ω with 600 mV/ns slew rate }}
{{EndSpecs}}
 
==Internals==


The S-53 uses tunnel diode triggering with an amplifier before the tunnel diode.   
The S-53 uses tunnel diode triggering with an amplifier before the tunnel diode.   
Line 24: Line 37:
tunnel diode CR25.  The extra current from Q20 or Q22 pushes CR25 over its peak current, and it switches
tunnel diode CR25.  The extra current from Q20 or Q22 pushes CR25 over its peak current, and it switches
to the high voltage state.   
to the high voltage state.   
==Specifications==
{{BeginSpecs}}
{{Spec | Bandwidth | 1 GHz }}
{{Spec | Input impedance | 50 Ω [[BNC connector]] }}
{{Spec | Jitter | max. 15 ps or less (from input signal to trigger-out) }}
{{Spec | Trigger-out signal | 1 V into 50 Ω with 600 mV/ns slew rate }}
{{EndSpecs}}


==Pictures==
==Pictures==
<gallery>
<gallery>
File:Tek s53 front.jpg
Tek-s53.jpg
File:Tek s53 left.jpg
Tek s-53 on cart.jpg
Image:Tek s-53.jpg|Front
Tek s53 left.jpg
Image:TEKS53 b40391.jpg|Front
Tek s-53.jpg|Front
Image:Tek s53 sch.png|Schematic
TEKS53 b40391.jpg|Front
File:Tek s53 bottom.jpg
Tek s53 bottom.jpg
File:Tek s53 top.jpg
Tek s53 top.jpg
File:Tek s53 right.jpg
Tek s53 right.jpg
File:Tek s53 right2.jpg
Tek s53 right2.jpg
File:Tek s53 rear.jpg
Tek s53 rear.jpg
7s12-7s11-1ghz-store.jpg | S-53 in a [[7S12]] displaying a 1 GHz sine using a [[S-6]] sampling head. 2<sup>nd</sup> channel (top) on a [[7S11]] with [[S-4]] sampling head.
Tek s-53 in hand.jpg
Tek s53 sch.png|Schematic
</gallery>
</gallery>




[[Category:7000 and 3S series sampling heads]]
[[Category:7000 and 3S series sampling heads]]

Revision as of 12:09, 7 November 2017

Template:Plugin Sidebar 2 The Tektronix S-53 Trigger Recognizer head can be used in the right bay of the 7S12 TDR/Sampler plug-in or externally in a type 285 enclosure. It essentially contains the entire trigger circuit of an oscilloscope.

Key Specifications

Bandwidth 1 GHz
Input impedance 50 Ω BNC connector
Sensitivity 10 mV to 1 V (p-p)
Jitter max. 15 ps or less (from input signal to trigger-out)
Delay 15 ns (from input signal to trigger-out)
Trigger-out signal 1 V into 50 Ω with 600 mV/ns slew rate

Internals

The S-53 uses tunnel diode triggering with an amplifier before the tunnel diode.

The signal first passes through a compensated NPN differential amplifier, Q10 and Q12, which provides an adjustable trigger offset voltage and trigger polarity selection. Switching diodes CR6 and CR8 are used for selecting the trigger polarity. The differential amplifier (i.e., phase splitter) generates both phases, inverted and non-inverted. Depending on the position of the trigger polarity switch, one or the other of the phases is shunted by 200 Ω resistor. The two signals are buffered by common-base amplifiers Q20 and Q22, whose collector currents are summed. R25 sets up a bias current on trigger tunnel diode CR25. The extra current from Q20 or Q22 pushes CR25 over its peak current, and it switches to the high voltage state.

Pictures