S-52: Difference between revisions

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Manual needed.
{{Plugin Sidebar
|manufacturer=Tektronix
|series=7000 and 3S series sampling heads
|type=S-52
|summary=Pulse Generator
|image=Tek-s52-front.jpg
|caption=S-52 head, front panel
|introduced=1971
|discontinued=1990
|designers=Murlan Kaufman
|manuals=
* [[Media:070-1101-01.pdf|Tektronix S-52 Instruction Manual, Revised Sep 1985]]
* [[Media:070-1101-01 early.pdf|Tektronix S-52 Instruction Manual, Early Version]]
}}
The '''Tektronix S-52''' is a pulse generator head compatible with S-series sampling units
like the [[3S2]], [[7S11]], and [[7S12]].
It was designed by [[Murlan Kaufman]].
It makes use of [[Patent US 3612910A|US Patent US3612910A, "Triggered Pulse Generator Having Automatic Bias Adjustment"]].
 
It puts out a 200 mV pulse into a load of 50 Ω.
The pulse has a rise time of 25 ps or less. 
The output is an [[SMA connector]]. 
 
In addition to the main pulse output, the S-52 also produces a pre-trigger pulse 85 ns before the main pulse. 
The delay is generated with a digital counter, and jitter between the pre-trigger pulse and the main pulse is specified as less than 10 ps.
The pre-trigger pulse uses a [[BSM connector]].
 
{{BeginSpecs}}
{{Spec | Rise time | < 25 ps}}
{{Spec | Output amplitude | 200 mV into 50 Ω (SMA)}}
{{Spec | Pulse Duration | > 350 ns}}
{{Spec | Output impedance | 50 Ω «reverse terminated» (i.e. having controlled source impedance) }}
{{Spec | Pre-trigger output | 85 ns before main pulse (jitter < 10 ps), +1 V into 50 Ω (BSM) }}
{{EndSpecs}}
 
==Internals==
 
The S-52 generates the main output pulse using a
50 mA low-capacitance [[tunnel diodes|tunnel diode]] with part number [[153-0040-00]]. 
 
The S-52 is [[S-50#Comparison_of_S-50_and_S-52|similar to the S-50]],
but the S-50 has twice the pulse amplitude. 
The reason for this is that the S-52 has a 48 Ω resistor between the output tunnel diode
and the output connector providing back termination, while the S-50 has no such resistor.
Although the S-52 produces a smaller pulse, its output impedance is much better controlled than that of the S-50,
and the output resistor may also provide some limited protection for the output tunnel diode.
 
The S-52 uses a [[156-0048-00]] (LM3046) transistor array in the timing board.
 
==Links==
* [http://www.amplifier.cd/Test_Equipment/Tektronix/Tektronix_7000_series_special/S-52.html Tek S-52 page @ amplifier.cd]
* [http://www.barrytech.com/tektronix/tek7000/teks52.html Tektronix S-52 @ barrytech.com]
 
==See Also==
* [[25ps Push-Pull Pulse Generator]]
==Pictures==


<gallery>
<gallery>
Image:Tek s-52.jpg
Tek-s52-front.jpg | S-52 front
S-52_front_A_prototype.jpg | S-52 front  A-prototype
7s12-s6-s52-f.jpg | S-52 pulse generator and [[S-6|S-6 sampling head]] in a [[7S12|7S12 TDR/Sampler plugin]]
S-52_A_prototype.jpg | A-prototype of S-52
</gallery>
</gallery>
===Internal===
<gallery>
Tek-s52-1.jpg    | A1 Timing board (right)
Tek-s52-2.jpg    | A3 Trigger board (left)
Tek-s52-3.jpg    | A2 Tunnel Diode Control board (center)
Tek-s52-4.jpg    | Tunnel diode mount
Tek-s52-diode-mount.jpg | Tunnel diode mount, detail
Tek_s-52_schem2.png |Schematic
</gallery>
===Measurements===
<gallery>
7s12-self-portrait.jpg | TDR "Self Portrait" — pulse reflected on S-6 "through" path (approx. 120 ps one way)
7s12-s52-incident.jpg | 7S12 displaying the incident pulse from an S-52 (nom. < 25 ps) through an S-6 head (nom. < 30 ps). Displayed rise time ~35 ps confirms spec.
7s12-s52-pulse-1.jpg | Full pulse pattern of a 7S12/S-52 in real time (top trace) and sampled (bottom trace) shown simultaneously on [[7844]].  7S12 trace at slowest possible sweep.
7s12-s52-pulse-2.jpg | S-52 pulse in real time (top trace) and sampled (bottom trace) shown simultaneously on [[7844]].  Approximately equal time scales.
S_52_a_prototype_wfm.png | Full pulse pattern of a S-52 (A-prototype) , driven by 3S6 (freerunning)
</gallery>
[[Category:7000 and 3S series sampling heads]]

Revision as of 12:40, 29 May 2023

Tektronix S-52
Pulse Generator
S-52 head, front panel

Compatible with 7000 and 3S series sampling heads

Produced from 1971 to 1990

Manuals
Manuals – Specifications – Links – Pictures

The Tektronix S-52 is a pulse generator head compatible with S-series sampling units like the 3S2, 7S11, and 7S12. It was designed by Murlan Kaufman. It makes use of US Patent US3612910A, "Triggered Pulse Generator Having Automatic Bias Adjustment".

It puts out a 200 mV pulse into a load of 50 Ω. The pulse has a rise time of 25 ps or less. The output is an SMA connector.

In addition to the main pulse output, the S-52 also produces a pre-trigger pulse 85 ns before the main pulse. The delay is generated with a digital counter, and jitter between the pre-trigger pulse and the main pulse is specified as less than 10 ps. The pre-trigger pulse uses a BSM connector.

Key Specifications

Rise time < 25 ps
Output amplitude 200 mV into 50 Ω (SMA)
Pulse Duration > 350 ns
Output impedance 50 Ω «reverse terminated» (i.e. having controlled source impedance)
Pre-trigger output 85 ns before main pulse (jitter < 10 ps), +1 V into 50 Ω (BSM)

Internals

The S-52 generates the main output pulse using a 50 mA low-capacitance tunnel diode with part number 153-0040-00.

The S-52 is similar to the S-50, but the S-50 has twice the pulse amplitude. The reason for this is that the S-52 has a 48 Ω resistor between the output tunnel diode and the output connector providing back termination, while the S-50 has no such resistor. Although the S-52 produces a smaller pulse, its output impedance is much better controlled than that of the S-50, and the output resistor may also provide some limited protection for the output tunnel diode.

The S-52 uses a 156-0048-00 (LM3046) transistor array in the timing board.

Links

See Also

Pictures

Internal

Measurements