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7B70: Difference between revisions
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Photos from early example. Components section.
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* [ | {{Plugin Sidebar | ||
* [http:// | |manufacturer=Tektronix | ||
|type=7B70 | |||
|summary=200 MHz Timebase | |||
|image=Tek-7b70-front.jpg | |||
|caption=Tektronix 7B70 | |||
|introduced=1969 | |||
|discontinued=1975 | |||
|designers=Murlan Kaufman | |||
|series=7000-series scopes | |||
|manuals= | |||
* [[Media:070-0982-00.pdf|Tektronix 7B70 Manual]] (OCR) / <small>[[Media:070-0982-00 (2).pdf|Alternate Copy]]</small> | |||
* [[Media:070-1579-00.pdf|Tektronix 7B70 Manual]] SN B205000+ | |||
}} | |||
The '''Tektronix 7B70''' is a 200 MHz time-base plug-in for [[7000-series scopes]]. It has no delay function. | |||
For delayed-sweep applications, the 7B70 is operated in conjunction with the model [[7B71]] delaying timebase. The 7B70/7B71 were primarily intended for the [[7704]] mainframe. | |||
The task of designing the 7B70 was inherited and completed by [[Murlan Kaufman]]. | |||
The 7B71/7B70 were superseded by the [[7B85]]/[[7B80]] pair (400 MHz) in 1976. | |||
{{BeginSpecs}} | |||
{{Spec | Sweep | 5 s/Div to 20 ns/Div in 1−2−5 sequence, ×10 magnifier down to 2 ns/Div, variable down to 12.5 s/Div}} | |||
{{Spec | Excluded portions of sweep | None in 7700-series, first 50 ns with magnifier }} | |||
{{Spec | Trigger sensitivity | 0.3 Div (int) or 75 mV (ext) up to 20 MHz, 1.5 Div or 375 mV from 20 MHz to 200 MHz }} | |||
{{Spec | Trigger coupling | DC, AC (>30 Hz), AC HF REJ (30 Hz to 50 kHz), AC LF REJ (>30 kHz) }} | |||
{{Spec | Trigger input | 1 MΩ // 20 pF, max. 500 V DC+peak AC }} | |||
{{Spec | Jitter | less than 1 ns at 150 MHz }} | |||
{{Spec | Trigger Modes | Peak-Peak Auto, Auto, Norm, Single Sweep}} | |||
{{Spec | External horizontal amplifier | 25 mV/Div or 250 mV/Div ranges, variable}} | |||
{{EndSpecs}} | |||
==X-Y operation== | |||
The 7B70 has a dedicated switch to put it in "amplifier mode" for X-Y operation. In this mode, the Trigger Source switch controls the signal source – internal from a vertical plug-in via the trigger path, or external — and the Trigger Coupling switch controls AC vs. DC coupling. | |||
In amplifier mode, gain can be varied using an uncalibrated potentiometer. | |||
==Links== | |||
* [http://www.barrytech.com/tektronix/tek7000/tek7b70.html Tek 7B70 @ barrytech.com] | |||
* [http://www.amplifier.cd/Test_Equipment/Tektronix/Tektronix_7000_series_timebase/timebase_7B70.htm Tek 7B70 @ amplifier.cd] | |||
{{Documents|Link=7B70}} | |||
==Internals== | |||
The 7B70 contains five 148-0034-00 [[miniature relays]] and one 148-0035-00. It also contains one [[152-0154-00]] and two [[152-0125-00]] [[tunnel diodes]]. | |||
==Pictures== | |||
<gallery> | |||
Tek-7b70-front.jpg | 7B70, front panel | |||
Tek-7b70-left.jpg | 1973 LHS | |||
Tek-7b70-right.jpg | 1973 RHS | |||
7B70 LHS 1969.jpg | 1969 LHS | |||
7B70 RHS 1969.jpg | 1969 RHS | |||
Tek 7b70 1.JPG | |||
</gallery> | |||
==Components== | |||
{{Parts|7B70}} | |||
[[Category:7000 series horizontal plugins]] | |||