1S2: Difference between revisions

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caption=1S2 front view|
caption=1S2 front view|
introduced=1967 |
introduced=1967 |
discontinued=1972 |
discontinued=1973 |
series=[[500-series scopes]]|
series=[[500-series scopes]]|
manuals=
manuals=
* [http://w140.com/kurt/tek_1s2_sn1990-up.pdf 1S2 manual (PDF, sn 1990 and up)]
* [[Media:070-0889-00.pdf|1S2 manual (PDF, sn 1990 and up)]]
* [http://www.pa4tim.nl/wp-content/uploads/2012/01/1S2calibrationPA4TIM.pdf 1S2 Calibration Guide by Fred Schneider, PA4TIM]
* [http://www.pa4tim.nl/wp-content/uploads/2012/01/1S2calibrationPA4TIM.pdf 1S2 Calibration Guide by Fred Schneider, PA4TIM]
* [http://www.pa4tim.nl/?p=3016 1S2 Page on the Website of Fred Schneider, PA4TIM]
* [http://www.pa4tim.nl/?p=3016 1S2 Page on the Website of Fred Schneider, PA4TIM]
}}
}}
The '''Tektronix 1S2''' is a [[sampling oscilloscope|sampling]]/TDR plug-in for [[500-series scopes]].
The '''Tektronix 1S2''' is a [[sampling oscilloscope|sampling]]/TDR plug-in for [[500-series scopes]], [[introduced in 1967]] and sold through 1972.
Like the [[1S1]], it is a complete sampling subsystem and uses the mainframe merely as a power supply and low-speed display.


Unlike the 1S1, it contains pulsers that allows it to perform time-domain reflectometry (TDR) measurements.   
Like the [[1S1]], it is a complete sampling subsystem and uses the mainframe merely as a power supply and low-speed X-Y display.
The 1S2 outputs the Y-axis signal on plug-in interface connector pins 1 and 3 like other 500-series plug-ins, and the X-axis signal on the front panel, via a banana connector. The X-axis sensitivity of the oscilloscope mainframe is expected to be 1 V/div.
 
Unlike the 1S1, the 1S2 contains pulsers that allows it to perform time-domain reflectometry (TDR) measurements.   
The 1S2 has two 50 Ω pulsers, one of which is active at a time.  One puts out a 250 mV pulse with 50 ps rise time.   
The 1S2 has two 50 Ω pulsers, one of which is active at a time.  One puts out a 250 mV pulse with 50 ps rise time.   
The other puts out a slower 1 V pulse.  The sampling bridge is a feed-through type.   
The other puts out a slower 1 V pulse.  The sampling bridge is a feed-through type.   


For TDR measurements, the signal from one of the internal pulsers is fed through the sampler, and out to the the transmission line being tested.   
For TDR measurements, the signal from one of the internal pulsers is fed through the sampler, and out to the the transmission line being tested.   
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Waveform output can be to the CRT of the mainframe and/or to a plotter or low-speed data acquisition device via banana connectors on the front of the 1S2.   
Waveform output can be to the CRT of the mainframe and/or to a plotter or low-speed data acquisition device via banana connectors on the front of the 1S2.   


The 1S2 was [[introduced in 1967]] and was sold through 1971 or 1972.
The interface between the GR-874 connector and the printed circuit board is described in US Patent 3,426,311.
 
{{MissingSpecs}}
 
==Internals==
The 1S2 contains an internal power supply producing regulated +19 V, -19 V, and -136 V outputs,
derived from a power transformer whose primary voltage is the 6.3 V<sub>AC</sub>
provided by the 500-series mainframe on pins 13 and 14 of the plug-in interface connector.
The regulators use bipolar transistors for the feedback amplifiers and the output emitter-followers, and zener diodes as references.


==Links==
==Links==


* [http://slack.com/TE/TekConcepts/TekTDRMeas.pdf Tektronix TDR Measurement Concepts]
* [[Media:062-1244-00.pdf | Tektronix 062-1244-00: Time-Domain Reflectometry Measurement Concepts]], James A. Strickland, 1969. pages. PDF, OCR, 6.2 MB
* [[Media:Service Scope 45 Aug 1967.pdf  | Service Scope No. 45, August 1967]]
* [[Media:Service Scope 45 Aug 1967.pdf  | Service Scope No. 45, August 1967 - Time-Domain Reflectometry Theory]]
* [[Media:Service Scope 38 Jun 1966.pdf | Service Scope No. 38, June 1966 - Tektronix Type 1S2 Makes Reflectometry Easy]]
* [http://w140.com/kurt/50_years_sampling.pdf 50 Years of RF and Microwave Sampling, Mark Kahrs]
* [http://w140.com/kurt/50_years_sampling.pdf 50 Years of RF and Microwave Sampling, Mark Kahrs]
* [http://www.picosecond.com/objects/AN-04.pdf Picosecond Pulse Labs Application Note 4: TDR]
* [http://www.picosecond.com/objects/AN-04.pdf Picosecond Pulse Labs Application Note 4: TDR]
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<gallery>
<gallery>
Image:1s2_front.jpg|front view
1s2_front.jpg|front view
Image:1s2_left.jpg|left side view
1s2_left.jpg|left side view
Image:1s2_right.jpg|right side view
1s2_right.jpg|right side view
Image:1s2_bottom.jpg|bottom view
1s2_bottom.jpg|bottom view
Tek 1s2 e 1.jpg|time mode
Tek 1s2 e 1.jpg|time mode
Tek 1s2 e 2.jpg|distance mode
Tek 1s2 e 2.jpg|distance mode
Line 47: Line 58:
Tek 1s2 e 6.jpg
Tek 1s2 e 6.jpg
Tek 1s2 e 7.jpg
Tek 1s2 e 7.jpg
Tek 1s2 regulated ps.png|Internal Regulated Power Supply
</gallery>
</gallery>



Revision as of 01:19, 21 April 2018

Template:Plugin Sidebar 2 The Tektronix 1S2 is a sampling/TDR plug-in for 500-series scopes, introduced in 1967 and sold through 1972.

Like the 1S1, it is a complete sampling subsystem and uses the mainframe merely as a power supply and low-speed X-Y display. The 1S2 outputs the Y-axis signal on plug-in interface connector pins 1 and 3 like other 500-series plug-ins, and the X-axis signal on the front panel, via a banana connector. The X-axis sensitivity of the oscilloscope mainframe is expected to be 1 V/div.

Unlike the 1S1, the 1S2 contains pulsers that allows it to perform time-domain reflectometry (TDR) measurements. The 1S2 has two 50 Ω pulsers, one of which is active at a time. One puts out a 250 mV pulse with 50 ps rise time. The other puts out a slower 1 V pulse. The sampling bridge is a feed-through type.

For TDR measurements, the signal from one of the internal pulsers is fed through the sampler, and out to the the transmission line being tested. Returning pulses are detected as they pass back through the sampler, and they are reabsorbed by the 50 Ω impedance of the pulser.

Waveform output can be to the CRT of the mainframe and/or to a plotter or low-speed data acquisition device via banana connectors on the front of the 1S2.

The interface between the GR-874 connector and the printed circuit board is described in US Patent 3,426,311.

Key Specifications

  • please add

Internals

The 1S2 contains an internal power supply producing regulated +19 V, -19 V, and -136 V outputs, derived from a power transformer whose primary voltage is the 6.3 VAC provided by the 500-series mainframe on pins 13 and 14 of the plug-in interface connector. The regulators use bipolar transistors for the feedback amplifiers and the output emitter-followers, and zener diodes as references.

Links

Pictures