1S1: Difference between revisions

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{{Plugin Sidebar 2 |  
{{Plugin Sidebar  
title=Tektronix 1S1|
|manufacturer=Tektronix
summary=Sampling system|
|series=500-series scopes
image=1s1 front details.JPG |  
|type=1S1
caption=1S1 front view|
|summary=1 GHz sampling system
introduced=1965 |
|image=Tek 1s1 front2.jpeg
discontinued=1974 |
|caption=1S1 front view
series=[[500-series scopes]]|
|introduced=1965  
manuals=
|discontinued=1974  
* [[Media:070-0475-00.pdf|Tektronix 1S1 Manual (PDF, retouched)]]
|designers=Gene Cowan;Chuck Edgar
* [http://bama.edebris.com/download/tek/1s1/1s1.djvu Tektronix 1S1 Manual (DjVu)]
|manuals=
* [http://w140.com/1s1.pdf Tektronix 1S1 Manual (PDF)]
* [[Media:070-0475-00.pdf|Tektronix 1S1 Manual 070-0475-00]] (retouched)
* [[Media:tek_1s1_field_training_package.pdf|Tektronix 1S1 Field Training Package (PDF, OCR)]]
* [[Media:tek_1s1_field_training_package.pdf|Tektronix 1S1 Field Training Package]] (OCR)
 
* [[1S1/Repairs|David Wise 1S1 Repair Notes]]
* [[1S1/Repairs|David Wise 1S1 Repair Notes]]
<small>
'''Alternate copies'''
* [https://w140.com/1s1.pdf Tektronix 1S1 Manual 070-0475-00]
* [https://bama.edebris.com/download/tek/1s1/1s1.djvu Tektronix 1S1 Manual] (DjVu @ BAMA)
</small>
}}
}}
The '''Tektronix 1S1''' is a [[sampling oscilloscope|sampling]] plug-in for [[500-series scopes]], designed by [[Gene Cowan]] (vertical) and [[Chuck Edgar]] (horizontal), [[introduced in 1965]] and sold through 1973.
The '''Tektronix 1S1''' is a [[sampling oscilloscope|sampling]] plug-in for [[500-series scopes]], designed by [[Gene Cowan]] (vertical) and [[Chuck Edgar]] (horizontal), [[introduced in 1965]] and sold through 1973.
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It is essentially one channel of a sampling unit and a timing unit from a [[661]].  It has its own trigger and timebase.   
It is essentially one channel of a sampling unit and a timing unit from a [[661]].  It has its own trigger and timebase.   


The oscilloscope's timebase is usually set to a relatively slow sweep rate when using a 1S1.  Alternatively, the sweep  
The oscilloscope's timebase is usually set to a relatively slow sweep rate when using a 1S1.  Alternatively, the sweep on the oscilloscope can free-run, and the horizontal voltage from the oscilloscope can be used to control the 1S1, as described below.  
on the oscilloscope can free-run, and the horizontal voltage from the oscilloscope can be used to control the 1S1, as described below.  


The 1S1 has a 50 Ω [[GR-874 connector]] for the signal input.  The plug-in supplies power (+100 V and −12.6 V) to accessories like  
The 1S1 has a 50 Ω [[GR-874 connector]] for the signal input.  The plug-in supplies power  
the [[P6032]] Cathode Follower Probe, the [[281]] TDR Pulser, and the [[282|Type 282 Probe Adapter]], which is an active buffer to  
(+100 V and −12.6 V) to accessories like the [[P6032]] Cathode Follower Probe, the  
allow the use of high-impedance probes with the 50 Ω input of the 1S1 (at reduced bandwidth).
[[281|281 TDR Pulser]], and the [[282|Type 282 Probe Adapter]], which is an active buffer  
to allow the use of high-impedance probes with the 50 Ω input of the 1S1 (at reduced bandwidth).


{{MissingSpecs}}
{{BeginSpecs}}
{{Spec| Rise time            | 350 ps}}
{{Spec| Bandwidth            | 1 GHz }}
{{Spec| Trigger bandwidth    | 100 MHz (Norm/Auto trigger), 1 GHz (HF sync) }}
{{Spec| Vertical deflection  | 2 mV/div to 200 mV/div in 1−2−5 sequence }}
{{Spec| Sweep rate            | 50 µs/div to 1 ns/div in 1−2−5 sequence, magnifier up to ×100 }}
{{Spec| Input impedance      | 50 Ω }}
{{Spec| Output                | Front-panel, vertical 200 mV/div; horizontal 1 V/div into a high-impedance load }}
{{Spec| Maximum input        | ±2 V }}
{{EndSpecs}}


==Operation==
==Operation==
The 1S1 can operate in normal self-swept mode or an external sweep signal can be applied to the 1S1.   
The 1S1 can operate in normal self-swept mode, or an external sweep signal can be applied to the 1S1.   
With the 1S1's internal sweep disabled, the horizontal-in and vertical-out connections can be used  
With the 1S1's internal sweep disabled, the horizontal-in and vertical-out connections can be used  
so the 1S1 acts as a lookup table, a mapping of X to Y, a function.   
so the 1S1 acts as a lookup table, a mapping of X to Y, a function.  
   
The 661 also has this capability, in its "A vert/B horiz" mode, which is like X-Y mode for a sampler.   
The 661 also has this capability, in its "A vert/B horiz" mode, which is like X-Y mode for a sampler.   
In this mode, the horizontal-in voltage controls the time after the trigger event when the sample should be taken,  
In this mode, the horizontal-in voltage controls the time after the trigger event when the sample should be taken,  
and the vertical-out voltage corresponds to the voltage measured at that instant.   
and the vertical-out voltage corresponds to the voltage measured at that instant.   
This allows a waveform to be digitized using an arbitrarily slow DAC to generate the horizontal voltage  
This allows a waveform to be digitized using an arbitrarily slow DAC to generate the horizontal voltage  
and ADC to read the sampled output.  But perhaps more importantly, by setting a constant horizontal-in voltage,  
and ADC to read the sampled output.  But perhaps more importantly, by setting a constant horizontal-in voltage,  
it allows the output signal at one equivalent time instant to be processed in the time domain.   
it allows the output signal at one equivalent time instant to be processed in the time domain.   
For example, this allows the voltage to be low-pass filtered, so that it can be more accurately measured.   
For example, this allows the voltage to be low-pass filtered, so that it can be more accurately measured.   
The other reason why one might want a signal that consists of multiple sequential measurements  
The other reason why one might want a signal that consists of multiple sequential measurements  
of the same equivalent-time instant is that statistics can be calculated on these observations.   
of the same equivalent-time instant is that statistics can be calculated on these observations.   
Line 49: Line 65:


==Internals==
==Internals==
The sampler in the 1S1 is quite different from the sampler in the [[1S2]].  The 1S1 uses a [[sampling diodes|four-diode]] sampling bridge, terminated within the 1S1.  The 1S2 uses a two-diode feed-through sampler, typical for TDR instruments.
The [[sampler]] in the 1S1 is quite different from the sampler in the [[1S2]].  The 1S1 uses a [[sampling diodes|four-diode]] sampling bridge, terminated within the 1S1.  The 1S2 uses a two-diode feed-through sampler, typical for TDR instruments.
 
The 1S1 uses two type [[8416]] tubes, the 12V version of the [[6DJ8]].


==Pictures==
==Pictures==


<gallery>
<gallery>
Tek 1s1 bottom2.jpeg ‎
Tek 1s1 front2.jpeg ‎
Tek 1s1 left2.jpeg ‎
Tek 1s1 rear3.jpeg ‎
Tek 1s1 right2.jpeg ‎
Tek 1s1 top2.jpeg
Tek 1s1.jpg|Front view
Tek 1s1.jpg|Front view
Tek_1S1_Iso.jpeg | 1S1
Tek_1S1_Iso.jpeg | 1S1
Line 69: Line 93:
Tek_1S1_Delayline.jpeg | Delay Line
Tek_1S1_Delayline.jpeg | Delay Line
1s1 block.jpg|block diagram
1s1 block.jpg|block diagram
1S1_in_535A.png| 1S1 in operation
Tektronix 1S1 probe power connector.jpg | 1S1 probe power connector
</gallery>
</gallery>
[[Category:Sampling plugins]]
 
[[Category:500 series plugins]]
==Components==
{{Parts|1S1}}
 
 
[[Category:500 series sampling plugins]]
[[Category:GR874]]
[[Category:GR874]]

Latest revision as of 04:36, 5 June 2024

Tektronix 1S1
1 GHz sampling system
1S1 front view

Compatible with 500-series scopes

Produced from 1965 to 1974

Manuals

Alternate copies

(All manuals in PDF format unless noted otherwise)
Manuals – Specifications – Links – Pictures

The Tektronix 1S1 is a sampling plug-in for 500-series scopes, designed by Gene Cowan (vertical) and Chuck Edgar (horizontal), introduced in 1965 and sold through 1973.

It is essentially one channel of a sampling unit and a timing unit from a 661. It has its own trigger and timebase.

The oscilloscope's timebase is usually set to a relatively slow sweep rate when using a 1S1. Alternatively, the sweep on the oscilloscope can free-run, and the horizontal voltage from the oscilloscope can be used to control the 1S1, as described below.

The 1S1 has a 50 Ω GR-874 connector for the signal input. The plug-in supplies power (+100 V and −12.6 V) to accessories like the P6032 Cathode Follower Probe, the 281 TDR Pulser, and the Type 282 Probe Adapter, which is an active buffer to allow the use of high-impedance probes with the 50 Ω input of the 1S1 (at reduced bandwidth).

Key Specifications

Rise time 350 ps
Bandwidth 1 GHz
Trigger bandwidth 100 MHz (Norm/Auto trigger), 1 GHz (HF sync)
Vertical deflection 2 mV/div to 200 mV/div in 1−2−5 sequence
Sweep rate 50 µs/div to 1 ns/div in 1−2−5 sequence, magnifier up to ×100
Input impedance 50 Ω
Output Front-panel, vertical 200 mV/div; horizontal 1 V/div into a high-impedance load
Maximum input ±2 V

Operation

The 1S1 can operate in normal self-swept mode, or an external sweep signal can be applied to the 1S1. With the 1S1's internal sweep disabled, the horizontal-in and vertical-out connections can be used so the 1S1 acts as a lookup table, a mapping of X to Y, a function.

The 661 also has this capability, in its "A vert/B horiz" mode, which is like X-Y mode for a sampler. In this mode, the horizontal-in voltage controls the time after the trigger event when the sample should be taken, and the vertical-out voltage corresponds to the voltage measured at that instant.

This allows a waveform to be digitized using an arbitrarily slow DAC to generate the horizontal voltage and ADC to read the sampled output. But perhaps more importantly, by setting a constant horizontal-in voltage, it allows the output signal at one equivalent time instant to be processed in the time domain. For example, this allows the voltage to be low-pass filtered, so that it can be more accurately measured.

The other reason why one might want a signal that consists of multiple sequential measurements of the same equivalent-time instant is that statistics can be calculated on these observations. For example, one might want to know, when testing a logic gate, what is the propagation delay such that 99.9% of the transitions happen faster than this.

The horizontal-in voltage can also be produced, in "manual" mode, by setting a knob on the 1S1.

When the 1S1 is set for INT trigger signal, the EXT TRIG input is terminated with 50 Ω.

Internals

The sampler in the 1S1 is quite different from the sampler in the 1S2. The 1S1 uses a four-diode sampling bridge, terminated within the 1S1. The 1S2 uses a two-diode feed-through sampler, typical for TDR instruments.

The 1S1 uses two type 8416 tubes, the 12V version of the 6DJ8.

Pictures

Components

Some Parts Used in the 1S1

Part Part Number(s) Class Description Used in
1N3717 152-0381-00 152-0125-00 Discrete component 4.7 mA, 25 pF tunnel diode 1L40 1S1 1S2 11B1 11B2 11B2A 147A 1470 148 21A 22A 3B4 3B5 408 432 434 453 453A 454 466 491 5T3 544 RM544 546 RM546 547 RM547 556 RM556 7B70 7B71 7D11
6DJ8 154-0187-00 154-0305-00 Vacuum Tube (Dual Triode) dual triode 067-506 111 132 161 310A 316 317 502 502A 503 504 506 515 516 519 526 529 RM529 533 535 536 543 544 545 545A 545B 546 547 549 555 556 561A 561S 564 565 567 581 581A 585 585A 661 1A4 1S1 60 2A60 63 2A63 67 2B67 3A1 3A1S 3A2 3A3 3A6 3A7 72 3A72 75 3A75 4S2 51 3B1 3B1S 3B2 3B3 3B4 3M1 3S76 3T77 3T77A 9A1 9A2 1121 80 81 82 86 B O W Z Telequipment D56 Telequipment S32A Telequipment D52 S-311 Telequipment TD51 Telequipment S52 Telequipment S51 Telequipment Type A TU-4
8056 154-0417-00 Vacuum Tube (Triode) low-voltage Nuvistor triode 422 502 W 1S1 3A7 3S3 3T4 5T3 10A1
8416 154-0413-00 157-0116-00 Vacuum Tube (Dual Triode) dual triode 1S1 2A61 3A8 3L5 W
SMTD995 152-0140-01 Discrete component 10 mA, 8 pF tunnel diode 1S1 1S2 1502 21A 22A 3T5 3T6 475 475A 475M 544 R544 546 RM546 547 RM547 556 R556 581A 585A RM585 7B52 7B53N 7B70 7B71 7D10 7D11 7T11 7T11A R7912 S-51 S-52 TU-5 067-0572-00 067-0572-01 067-0681-00
STD704 152-0125-00 Discrete component 4.7 mA tunnel diode 1L40 1S1 11B1 11B2 11B2A 147 R147 147A R147A 1470 148 R148 148-M 149 R149 149A R149A 21A 22A 3B4 3B5 408 432 434 453 453A 454 464 465 466 491 5T3 544 RM544 546 RM546 547 RM547 556 RM556 7B70 7B71 7D11
TD252 152-0214-00 Discrete component 4.7 mA, 6 pF tunnel diode 1S1