1S2: Difference between revisions

Revision as of 02:04, 11 September 2023

Tektronix 1S2
Sampling system/TDR 1S2 front view Compatible with 500-series scopes Produced from 1967 to 1973 Manuals 1S2 manual (S/N 1990+, OCR) Manual needed for sn below 1990 Tektronix 1S2 Factory Calibration Procedure, June 1966 Tektronix 1S2 Factory Calibration Procedure, August 1968 Tektronix 1S2 Calibration Outline (All manuals in PDF format unless noted otherwise)

Manuals – Specifications – Links – Pictures

The Tektronix 1S2 is a sampling/TDR plug-in for 500-series scopes, introduced in 1967 and sold through 1972. Chuck Edgar designed the sweep circuitry and Gene Cowan designed the vertical circuitry.

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 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 V_AC 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

front view
left side view
right side view
bottom view
time mode
distance mode
Internal Regulated Power Supply
rear

@@ Line 1: / Line 1: @@
-{{Plugin Sidebar 2 |
+{{Plugin Sidebar
-title=Tektronix 1S2|
+|manufacturer=Tektronix
-summary=Sampling system/TDR|
+|series=500-series scopes
-image=1s2_front.jpg |
+|type=1S2
-caption=1S2 front view|
+|summary=Sampling system/TDR
-introduced=1967 |
+|image=Tek 1s2 front.jpg
-discontinued=1973 |
+|caption=1S2 front view
-series=[[500-series scopes]]|
+|introduced=1967
-manuals=
+|discontinued=1973
-* [[Media:070-0889-00.pdf|1S2 manual (PDF, sn 1990 and up, OCR)]]
+|designers=Chuck Edgar;Gene Cowan
-* [http://www.pa4tim.nl/wp-content/uploads/2012/01/1S2calibrationPA4TIM.pdf 1S2 Calibration Guide by Fred Schneider, PA4TIM]
+|manuals=
-* [http://www.pa4tim.nl/?p=3016 1S2 Page on the Website of Fred Schneider, PA4TIM]
+* [[Media:070-0889-00.pdf|1S2 manual]] (S/N 1990+, OCR)
+* ''Manual needed for sn below 1990 [[Category:Manual needed]]''
-* [[Media:1S2_calibration_guide.pdf|1S2 Calibration Guide by Fred Schneider, PA4TIM (PDF, OCR)]]
+* [[Media:Tek 1s2 fcp june 1966.pdf‎|Tektronix 1S2 Factory Calibration Procedure, June 1966]]
+* [[Media:Tek 1s2 fcp aug 1968.pdf‎|Tektronix 1S2 Factory Calibration Procedure, August 1968]]
+* [[Media:Tek 1s2 cal outline.pdf|Tektronix 1S2 Calibration Outline]]
+<!-- * [[Media:1S2_calibration_guide.pdf|1S2 Calibration Guide by Fred Schneider, PA4TIM]] -->
 }}
 The '''Tektronix 1S2''' is a [[sampling oscilloscope|sampling]]/TDR plug-in for [[500-series scopes]], [[introduced in 1967]] and sold through 1972.
+[[Chuck Edgar]] designed the sweep circuitry and [[Gene Cowan]] designed the vertical circuitry.
 Like the [[1S1]], it is a complete sampling subsystem and uses the mainframe merely as a power supply and low-speed X-Y display.
@@ Line 24: / Line 27: @@
 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 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.
@@ Line 41: / Line 44: @@
 ==Links==
-* [[Media:062-1244-00.pdf | Tektronix 062-1244-00: Time-Domain Reflectometry Measurement Concepts]], James A. Strickland, 1969. pages. PDF, OCR, 6.2 MB
+* [https://www.pa4tim.nl/wp-content/uploads/2012/01/1S2calibrationPA4TIM.pdf 1S2 Calibration Guide by Fred Schneider, PA4TIM]
+* [https://www.pa4tim.nl/?p=3016 1S2 Page on the Website of Fred Schneider, PA4TIM]
+* [[Media:062-1244-00.pdf | Tektronix 062-1244-00: Time-Domain Reflectometry Measurement Concepts]], James A. Strickland, 1969. OCR, 6.2 MB
 * [[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]
+* [https://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]
 ==Pictures==
@@ Line 71: / Line 75: @@
 [[Category:500 series plugins]]
 [[Category:GR874]]
+[[Category:Manual needed]]