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| {{Oscilloscope Sidebar |
| | #redirect[[5031]] |
| title=Tektronix R5031 |
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| summary=1 MHz, 10 μV dual-beam storage scope |
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| image=Tek r5031 1.jpg |
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| caption=Tek R5031 |
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| introduced=1969 |
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| discontinued=1972 |
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| manuals=
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| * [http://w140.com/tek_r5031.pdf Tektronix R5031 Manual (PDF)]
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| * [[File:Tek 5030 5031 from Catalog 1970.pdf|Models 5030/5031 in 1970 catalog (PDF, 8 pages)]]
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| }}
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| The '''Tektronix 5031''' is a dual-beam portable storage oscilloscope introduced in 1969 (no longer listed in the 1973 catalog). There is a benchtop model, the 5031, and a rack-mount model, the R5031, and a sister model [[5030]] without storage. They do not take plugins.
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| The storage tube is a split-screen bi-stable model.
| | [[Category:5030 series scopes]] |
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| It features differential and current probe (for [[P6021]]) inputs on both channels. Input ranges are similar to the contemporary [[3A9]] diff/current amplifier plugin but without the variable bandwidth and DC offset controls. The horizontal deflection system is shared.
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| The 5031/5030 include a readout system which uses small lightbulb/fiber dot matrix displays external to the CRT, similar to that in the [[576]] curve tracer. Only the first and last steps on the time/div and volts/div switches are labelled.
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| {{BeginSpecs}}
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| {{Spec | Bandwidth | DC to 1 MHz (5 kHz limit switchable) }}
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| {{Spec | Deflection | 10 μV/Div to 10 V/Div or 1 mA/Div to 200 mA/Div (1—2—5) }}
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| {{Spec | Noise | < 15 μV / 200 μA }}
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| {{Spec | Input impedance | 1 MΩ // 50 pF }}
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| {{Spec | Time base | 1 μs/Div to 5 s/Div (1—2—5), magnifier × 1, 2, 5, 10, 20, 50 (1 μs/Div max.)}}
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| {{Spec | CMRR | 100,000:1 to 100 kHz }}
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| {{Spec | X input | 20 mV/Div to 500 mV/Div on Ext Horizontal, or Channel 2 in X-Y mode}}
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| {{Spec | CRT | 8 × 10 Div @ 1.27 cm (0.5"), P31 phosphor }}
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| {{Spec | Acceleration | 4 kV }}
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| {{EndSpecs}}
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| ==Links==
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| * http://www.eevblog.com/forum/testgear/vintage-tektronix-oscilloscope/
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| ==Internals==
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| The channel-1 and channel-2 input attenuators use a rotary barrel cam that moves several small contact
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| arms to select the desired path through the attenuator networks.
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| The design is similar to that seen in several 7000-series plug-ins.
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| The front-end amplifier starts with a differential amplifier formed by
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| both halves of a [[151-1027-00]] dual JFET, Q46, followed by a dual PNP.
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| The rest of the signal path comprises differential amplifiers made of discrete
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| BJTs, including the deflection amplifier, which uses [[SE7056]] transistors for
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| its output stage.
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| The 5031 makes extensive use of relays in the signal path.
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| The 5031 has -4.1 kV on the CRT cathode, and no post-deflection acceleration.
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| ==Pictures==
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| <gallery>
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| File:Tek r5031 1.jpg|R5031 Front
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| File:Tek r5031 2.jpg|R5031 Front Controls
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| File:Tek r5031 3.jpg|R5031 Rear
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| </gallery>
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| [[Category:Analog storage scopes]]
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| [[Category:Dual beam scopes]]
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