S-51: Difference between revisions
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{{Plugin Sidebar | | |||
title=Tektronix S-51 | | |||
summary=Synchronizing Head | | |||
image=S-51.jpg | | |||
caption=S-51 head | | |||
series=[[:Category:Sampling plugins|7000/S3 series Sampling Plugins]] | | |||
years=? – ? | | |||
manuals= | |||
* [http://w140.com/tek_s-51.pdf Tektronix S-51 Manual (PDF)] | |||
}} | |||
The Tektronix Type S-51 is a synchronizing head for [[sampling oscilloscope]] systems such as the [[3S2]] | The Tektronix Type S-51 is a synchronizing head for [[sampling oscilloscope]] systems such as the [[3S2]] | ||
which use S-series sampling heads. | which use S-series sampling heads. | ||
From a periodic input signal in the | |||
the S-51 generates trigger pulses which have a fixed time relationship with the input signal. | 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 | The input is a 50 Ω [[Connectors#SMA|SMA]] connection. The input impedance is 50 Ω real | ||
in parallel with | in parallel with 1 pF. The minimum input sensitivity is 100 mV<sub>p-p</sub> and the maximum kickout is | ||
400 mV. The maximum jitter of the generated trigger signal is specified to be 15 ps for input | |||
signals less than | signals less than 5 GHz and 10 ps for input signals above 5 GHz. | ||
Equivalent-time sampling equipment generally requires the input signal to be repetitive. | 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 | 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. | ||
of all oscilloscopes that use synchronization instead of triggering. | |||
The S-51 contains a [[tunnel diodes|tunnel diode]] sync oscillator that oscillates at about | 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_osc is a subharmonic of f_in. | ||
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trigger output signal is, of course, also available at the rear interface connector. | trigger output signal is, of course, also available at the rear interface connector. | ||
==Pictures== | |||
<gallery> | <gallery> | ||
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Image:S-51 schem2.png | Image:S-51 schem2.png | ||
</gallery> | </gallery> | ||
[[Category:7000 and 3S series sampling heads]] | |||
Revision as of 07:24, 18 May 2014
The Tektronix Type S-51 is a synchronizing head for sampling oscilloscope systems such as the 3S2
which use S-series sampling heads.
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 connection. The input impedance is 50 Ω real in parallel with 1 pF. The minimum input sensitivity is 100 mVp-p and the maximum kickout is 400 mV. The maximum jitter of the generated trigger signal is specified to be 15 ps for input signals less than 5 GHz and 10 ps for input signals above 5 GHz.
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.
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, f_osc is a subharmonic of f_in.
- f_osc = f_in / n, where n is an integer between 5 and 90, inclusive
- f_osc is between 165 MHz and 285 MHz.
The approximate range of f_osc is adjustable.
Trigger pulses are produced at a 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 S-51 uses a BSM connector for its trigger output on the front panel. The trigger output signal is, of course, also available at the rear interface connector.
