4701: Difference between revisions
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The Tektronix 4701 is a multiplexer | {{Instrument Sidebar | ||
|class=Multiplexer | |||
|manufacturer=Tektronix | |||
|series= | |||
|model=4701 | |||
|summary=8-channel multiplexer | |||
|image=Tek 4701 1.jpg | |||
|caption=Tektronix 4701 miultiplexer | |||
|introduced=1971 | |||
|discontinued=(?) | |||
|manuals= | |||
* [[Media:070-1164-00.pdf|Tektronix 4701 Manual]] | |||
}} | |||
The '''Tektronix 4701''' is a multiplexer [[introduced in 1971]] that allows several signals to be displayed on a single oscilloscope | |||
or captured with a recording instrument. The 4701 contains logic for round-robin switching between the inputs. | |||
Each of the eight inputs to the Tek 4701 is differential. Each differential input signal goes into a discrete amplifier using a [[151-1036-00]] dual n-channel JFET. | |||
The output of the discrete amplifier is fed to another differential amplifier, this one using a [[CA3030]] opamp. | |||
This second stage converts the differential signal to single-ended and provides a low output impedance. | |||
The low-impedance single-ended signal is fed to a diode switch. | |||
There is a summing junction where the outputs of the diode switches meet, thus forming the multiplexer. | |||
An output amplifier buffers the voltage on the summing junction, producing the low-impedance output for the rear panel connector. | |||
{{MissingSpecs}} | |||
The signal path bandwidth is DC to 1 MHz. | |||
==Pictures== | |||
<gallery> | <gallery> | ||
Tek 4701 1.jpg | |||
Tek 4701 2.jpg | |||
Tek 4701 3.jpg | |||
Tek 4701 4.jpg | |||
Tek 4701 5.jpg | |||
Tek 4701 6.jpg | |||
Tek 4701 7.jpg | |||
Tek 4701 front.jpg | |||
Tek 4701 rear.jpg | |||
</gallery> | </gallery> | ||
==Components== | |||
{{Parts|4701}} | |||
[[Category:Introduced in 1971]] | |||
[[Category:Switches and multiplexers]] | |||
Latest revision as of 05:35, 12 December 2023
The Tektronix 4701 is a multiplexer introduced in 1971 that allows several signals to be displayed on a single oscilloscope or captured with a recording instrument. The 4701 contains logic for round-robin switching between the inputs.
Each of the eight inputs to the Tek 4701 is differential. Each differential input signal goes into a discrete amplifier using a 151-1036-00 dual n-channel JFET. The output of the discrete amplifier is fed to another differential amplifier, this one using a CA3030 opamp. This second stage converts the differential signal to single-ended and provides a low output impedance. The low-impedance single-ended signal is fed to a diode switch. There is a summing junction where the outputs of the diode switches meet, thus forming the multiplexer. An output amplifier buffers the voltage on the summing junction, producing the low-impedance output for the rear panel connector.
Key Specifications
- please add
The signal path bandwidth is DC to 1 MHz.
