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* [http://w140.com/tek_readout_oscilloscopes_1968_catalog.pdf "Digital Readout Introduction" in 1968 Catalog (PDF)] | * [http://w140.com/tek_readout_oscilloscopes_1968_catalog.pdf "Digital Readout Introduction" in 1968 Catalog (PDF)] | ||
}} | }} | ||
The Tektronix 567 is a [[sampling oscilloscope]] | The '''Tektronix 567''' is a [[sampling oscilloscope]] mainframe [[introduced in 1962]]. | ||
It has a digital plug-in unit, the [[6R1]] or [[6R1A]], that can be used to measure | It has a digital plug-in unit, the [[6R1]] or [[6R1A]], that can be used to measure | ||
waveform characteristics such as rise time. This digital unit provides a go/no-go output | waveform characteristics such as rise time. This digital unit provides a go/no-go output | ||
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useful for measuring the peak-to-peak amplitude of a signal. | useful for measuring the peak-to-peak amplitude of a signal. | ||
The mechanisms used by the digital unit are a sample and hold | The mechanisms used by the digital unit are a sample and hold circuit, a comparator, a counter, and a switched tap voltage divider. | ||
circuit, a comparator, a counter, and a switched tap voltage divider. | The digital unit takes its input from the vertical signal produced by the sampling unit. Therefore, it operates on a low-speed signal, | ||
The digital unit takes its input from the vertical signal produced | somewhat similar to the intermediate frequency (IF) in a superheterodyne radio. | ||
by the sampling unit. Therefore, it operates on a low-speed | |||
signal, somewhat similar to the intermediate frequency (IF) in | The user of the 567 positions two cursors along the X-axis. These cursors define two times and two voltages. | ||
a superheterodyne radio. The user of the 567 positions two | The tapped voltage divider produces several voltages along the interval spanned by the two cursor voltages: | ||
cursors along the X-axis. These cursors define two times and | 10%, 20%, 27%, 50%, 73%, 80%, and 90%. These voltages are used for making measurements such as the 10%-to-90% rise time. | ||
two voltages. The tapped voltage divider produces several | In this case, a counter is reset and started when the signal passes through the 10% voltage. | ||
voltages along the interval spanned by the two cursor voltages: | The counter counts the number of cycles of a built-in crystal clock. When the signal reaches the 90% voltage, | ||
10%, 20%, 27%, 50%, 73%, 80%, and 90%. These voltages are used | the counter is stopped and the count is displayed on the [[nixie tube]] digital numeric readout. The units and decimal place of the | ||
for making measurements such as the 10%-to-90% rise time. In this | digital unit are controlled by switch contacts on the timing unit plug-in, which connect to the digital unit through a multi-pin connector in the 567. | ||
case, a counter is reset and started when the signal passes through | |||
the 10% voltage. The counter counts the number of cycles of a | |||
built-in crystal clock. When the signal reaches the 90% voltage, | |||
the counter is stopped and the count is displayed on the [[nixie | |||
tube]] digital numeric readout. The units and decimal place of the | |||
digital unit are controlled by switch contacts on the timing unit plug-in, | |||
which connect to the digital unit through a multi-pin connector in | |||
the 567. | |||
The 567 does not have any post-deflection acceleration of the beam. | The 567 does not have any post-deflection acceleration of the beam. | ||
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to be operated outside the plug-in bay of the 567 for maintenance purposes. | to be operated outside the plug-in bay of the 567 for maintenance purposes. | ||
{{MissingSpecs}} | |||
==Pictures== | ==Pictures== | ||
<gallery> | <gallery> | ||
567_front.jpg|Front view, w 6R1A digital unit | |||
567_front_6r1.jpg | Front view, w 6R1 digital unit | |||
Tek_567_introduction2.jpg|576 Introduction in 1962 Catalog | |||
Tek567-3s76-3t77.jpg | |||
Tek 567 ps top.jpg|Top view power supply. Blue capacitors are not original. | |||
Tek 567 plug-in bay.jpg|Plug-in bay | |||
Tek 567 ps bottom.jpg|Bottom view power supply | |||
Tek 567 plug-in connectors.jpg|Plug-in connectors rear | |||
Tek 567 plug-in connectors2.jpg|Plug-in connectors front | |||
S52 s4 567.jpg|567 measuring 37ps combined rise time of [[S-52]] and [[S-4]] | |||
Tek-567 interconnections.png|Interconnections | |||
Tek-567 power supply.png|Power Supply | |||
Tek-567 calibrator.png|Calibrator | |||
Tek-567 crt circuit.png|CRT Circuit | |||
Motorola mc314.png|Motorola MC314 Datasheet Specifying Tek 567 for Timing Measurements | |||
Tek rm 567 small.jpg|Rackmount Version, the RM 567 | |||
</gallery> | </gallery> | ||