S-51: Difference between revisions

From TekWiki
Jump to navigation Jump to search
No edit summary
No edit summary
(15 intermediate revisions by 3 users not shown)
Line 1: Line 1:
The Tektronix Type S-51 is a synchronizing head for [[sampling oscilloscope]] systems such as the [[3S2]]
{{Plugin Sidebar
which use S-series sampling heads.   
|manufacturer=Tektronix
From a periodic input signal in the 1GHz to 18GHz range,
|series=7000 and 3S series sampling heads
the S-51 generates trigger pulses which have a fixed time relationship with the input signal.
|type=S-51
The input is a 50-ohm [[Connectors#SMA|SMA]] connection.  The input impedance is 50 ohms real
|summary=Synchronizing Head
in parallel with 1pF.  The minimum input sensitivity is 100mVpp and the maximum kickout is
|image=Tek s-51 1.jpg
400mV.  The maximum jitter of the generated trigger signal is specified to be 15ps for input
|caption=S-51 head
signals less than 5GHz and 10ps for input signals above 5Ghz.
|introduced=1969
|discontinued=1989
|designers=Murlan Kaufman
|manuals=
* [http://w140.com/tek_s-51.pdf Tektronix S-51 Manual (PDF)]
* [[Media:Tek s-51 fcp march 1969.pdf|Tektronix S-51 Factory Calibration Procedure, March 1969 (PDF, OCR)]]
}}
The '''Tektronix S-51''' is a synchronizing head for [[sampling oscilloscope]] systems such as the [[3S2]] or [[7S12]] which use S-series sampling heads.   
It was designed by [[Murlan Kaufman]].


Equivalent-time sampling equipment generally requires the input signal to be repetitive.
From a periodic input signal in the 1 GHz to 18 GHz range, the S-51 generates trigger pulses which have a fixed time relationship with the input signal.
The S-51 is more restrictive; it is specifically designed for periodic signals. This is true
The input is a 50 Ω [[SMA connector]]. The trigger output signal is available through a [[BSM connector]] on the front panel as well as through the internal interface.
of all oscilloscopes that use synchronization instead of triggering.


The S-51 contains a [[tunnel diodes|tunnel diode]] sync oscillator that oscillates at about 200 MHz (165 MHz to 285 MHz).
Equivalent-time sampling equipment generally requires the input signal to be repetitive. 
The S-51 is more restrictive; it is specifically designed for periodic signals. 
This is true of all oscilloscopes that use synchronization instead of triggering.
 
{{BeginSpecs}}
{{Spec | Input impedance | 50 Ω real // 1 pF }}
{{Spec | Input sensitivity | min. 100 mV<sub>p-p</sub>}}
{{Spec | Kick-out | ma. 400 mV }}
{{Spec | Jitter | max. 15 ps for input signals < 5 GHz, max. 10 ps above 5 GHz }}
{{EndSpecs}}
 
==Internals==
The S-51 contains a [[tunnel diodes|tunnel diode]] sync oscillator that oscillates at about 200 MHz (165 MHz to 285 MHz).
The input signal is coupled with this oscillator, resulting in injection locking.
The input signal is coupled with this oscillator, resulting in injection locking.
When locked, f_osc is a subharmonic of f_in.
When locked, f<sub>osc</sub> is a subharmonic of f<sub>in</sub>:
* f_osc = f_in / n, where n is an integer between 5 and 90, inclusive
* f<sub>osc</sub> = f<sub>in</sub> / n, where n is an integer between 5 and 90, inclusive
* f_osc is between 165 MHz and 285 MHz.
* f<sub>osc</sub> is between 165 MHz and 285 MHz.
The approximate range of f_osc is adjustable.
The approximate range of f<sub>osc</sub> is adjustable.


Trigger pulses are produced at a the beginning of a cycle of the sync oscillator.   
Trigger pulses are produced at the beginning of a cycle of the sync oscillator.   
After each trigger pulse is produced, the sync oscillator is turned off for about 15 microseconds.
After each trigger pulse is produced, the sync oscillator is turned off for about 15 microseconds.
As a result, the S-51 produces trigger pulses at a repetition rate of approximately 67 kHz.
As a result, the S-51 produces trigger pulses at a repetition rate of approximately 67 kHz.
Even without any input, the S-51 will produce trigger pulses at approximately 67 kHz.
Even without any input, the S-51 will produce trigger pulses at approximately 67 kHz.


The S-51 uses a [[Connectors#BSM|BSM connector]] for its trigger output on the front panel.  The
The tunnel diode, D2 in the schematic, that forms the sync oscillator is Tek part number [[153-0041-00]].
trigger output signal is, of course, also available at the rear interface connector.


* [http://w140.com/tek_s-51.pdf Tektronix S-51 Manual (PDF)]
==Pictures==


<gallery>
<gallery>
Image:S-51.jpg
Tek s-51 1.jpg
Image:S-51 schem2.png
Tek s-51 2.jpg
S-51.jpg
Tek s-51 internal1.jpg
Tek s-51 internal2.jpg
Tek s-51 internal3.jpg
S-51 schem2.png
Tek s51 on cart.jpg
Tek s51 front2.jpg
</gallery>
</gallery>
[[Category:7000 and 3S series sampling heads]]

Revision as of 09:00, 13 August 2021

Tektronix S-51
Synchronizing Head
S-51 head

Compatible with 7000 and 3S series sampling heads

Produced from 1969 to 1989

Manuals
Manuals – Specifications – Links – Pictures

The Tektronix S-51 is a synchronizing head for sampling oscilloscope systems such as the 3S2 or 7S12 which use S-series sampling heads. It was designed by Murlan Kaufman.

From a periodic input signal in the 1 GHz to 18 GHz range, the S-51 generates trigger pulses which have a fixed time relationship with the input signal. The input is a 50 Ω SMA connector. The trigger output signal is available through a BSM connector on the front panel as well as through the internal interface.

Equivalent-time sampling equipment generally requires the input signal to be repetitive. The S-51 is more restrictive; it is specifically designed for periodic signals. This is true of all oscilloscopes that use synchronization instead of triggering.

Key Specifications

Input impedance 50 Ω real // 1 pF
Input sensitivity min. 100 mVp-p
Kick-out ma. 400 mV
Jitter max. 15 ps for input signals < 5 GHz, max. 10 ps above 5 GHz

Internals

The S-51 contains a tunnel diode sync oscillator that oscillates at about 200 MHz (165 MHz to 285 MHz). The input signal is coupled with this oscillator, resulting in injection locking. When locked, fosc is a subharmonic of fin:

  • fosc = fin / n, where n is an integer between 5 and 90, inclusive
  • fosc is between 165 MHz and 285 MHz.

The approximate range of fosc is adjustable.

Trigger pulses are produced at the beginning of a cycle of the sync oscillator. After each trigger pulse is produced, the sync oscillator is turned off for about 15 microseconds. As a result, the S-51 produces trigger pulses at a repetition rate of approximately 67 kHz. Even without any input, the S-51 will produce trigger pulses at approximately 67 kHz.

The tunnel diode, D2 in the schematic, that forms the sync oscillator is Tek part number 153-0041-00.

Pictures

Retrieved from "https://w140.com/tekwiki/index.php?title=S-51&oldid=63560"