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S-50: Difference between revisions
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The Tektronix S-50 is a pulse generator head | {{Plugin Sidebar 2| | ||
with a | title=Tektronix S-50 | | ||
[[ | summary=Pulse Generator | | ||
PRETRIG OUT and TRIG OUT signals use [[ | image=Tek s-50 front.jpg | | ||
caption=S-50 Head | | |||
series=[[:Category:Sampling plugins|7000/S3 series Sampling Plugins]] | | |||
introduced=1969 | | |||
discontinued=1975 | | |||
manuals= | |||
* [http://w140.com/tek_s-50.pdf Tektronix S-50 Manual (46MB, PDF)] | |||
* [http://w140.com/tek_s-series_sampling_heads.pdf Tektronix S-Series Sampling Heads (195MB, PDF)] | |||
}} | |||
The '''Tektronix S-50''' is a pulse generator head that produces 400 mV pulses with a rise time under 25 ps. The pulse output is an | |||
[[SMA connector]]. The PRETRIG OUT and TRIG OUT signals use [[BSM connector]]s. | |||
The output diode is the same one that the [[S-52]] uses, the [[153-0040-00]]. | The output diode is the same one that the [[S-52]] uses, the [[153-0040-00]]. | ||
| Line 8: | Line 19: | ||
== Comparison of S-50 and S-52 == | == Comparison of S-50 and S-52 == | ||
The S-50 is similar to the [[S-52]], | The S-50 is similar to the [[S-52]], but the output pulse amplitude of the S-50 is 400 mV, twice that of the S-52. | ||
but the output pulse amplitude of the S-50 is | The S-50's output tunnel diode is directly connected to the main pulse output connector. | ||
twice that of the S-52. | The S-52 has a 48-ohm resistor between the output tunnel diode and the main pulse output connector, resulting in a 2:1 voltage divider. | ||
The S-50's output tunnel diode is directly connected | Another difference between the S-50 and S-52 is the presence of a TRIG OUT on the front of the of S-50. Both have PRETRIGGER OUT connectors. | ||
to the main pulse output connector. | The pretrigger of the S-50 leads the main pulse by 75 ns, that of the S-52 by 85 ns. | ||
The S-52 has a 48-ohm resistor between the output tunnel diode | |||
and the main pulse output connector, | At the circuit level, the S-50 and S-52 differ significantly. Both use a current switch to bias the output tunnel diode when | ||
resulting in a 2:1 voltage divider. | it is in the "armed" state. The S-50 uses another tunnel diode to add a short pulse of current that "fires" the output tunnel diode. The S-52 uses a [[snap-off diode]] to generate this firing pulse. | ||
Another difference between the | |||
S-50 and S-52 is | Sequencing of events (arming the output diode, firing it, resetting it) is controlled by analog timing circuits in the S-50. The S-52 uses a digital counter and a decoder to generate the internal control signals. | ||
on the front of the of S-50. | |||
Both have PRETRIGGER OUT. | ==Specifications== | ||
The pretrigger of the S-50 leads the main pulse by | |||
At the circuit level, the S-50 and S-52 differ significantly. | |||
Both use a current switch to bias the output tunnel diode when | |||
it is in the "armed" state. The S-50 uses another tunnel diode | |||
to add a short pulse of current that "fires" the output tunnel diode. | |||
The S-52 uses a snap-off diode to generate this firing pulse. | |||
Sequencing of events (arming the output diode, firing it, resetting it) | |||
is controlled by analog timing circuits in the S-50. The S-52 uses a | |||
digital counter and a decoder to generate the internal control signals. | |||
{| | :{| class="wikitable" | ||
| | |- | ||
! scope="col" | | ! scope="col" | | ||
! scope="col" | S-50 | ! scope="col" | S-50 | ||
| Line 38: | Line 39: | ||
|- | |- | ||
! scope="col" | Risetime | ! scope="col" | Risetime | ||
| under | | under 25 ps | ||
| under | | under 25 ps | ||
|- | |- | ||
! scope="col" | | ! scope="col" | Amplitude | ||
| | | 400 mV into 50 Ω | ||
| | | 200 mV into 50 Ω | ||
|- | |- | ||
! scope="row" | Output impedance | ! scope="row" | Output impedance | ||
| varies, not specified || | | varies, not specified || 50 Ω | ||
|- | |- | ||
! scope="row" | Sequencing of internal events | ! scope="row" | Sequencing of internal events | ||
| Line 53: | Line 54: | ||
|- | |- | ||
! scope="row" | Pretrigger lead time | ! scope="row" | Pretrigger lead time | ||
| | | 75 ns | ||
| | | 85 ns | ||
|- | |||
! scope="row" | Pretrigger to pulse jitter | |||
| 15 ps | |||
| 10 ps | |||
|- | |||
! scope="row" | Pulse repetition rate | |||
| 25 kHz | |||
| 120 kHz | |||
|- | |- | ||
! scope="row" | Trigger (with pulse) output | ! scope="row" | Trigger (with pulse) output | ||
| yes, | | yes, 200 mV into 50 Ω | ||
| no | | no | ||
|- | |- | ||
| Line 65: | Line 74: | ||
|} | |} | ||
==Pictures== | |||
<gallery> | <gallery> | ||
Tek s-50 block.png|block diagram | |||
S-50 schem.png|schematic | |||
Tek s-50.JPG|front view | |||
Tek s-50 20203 1.jpg | |||
Tek s-50 20203 2.jpg | |||
</gallery> | </gallery> | ||
[[Category:7000 and 3S series sampling heads]] | |||