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{{Plugin Sidebar 2|
{{Plugin Sidebar
title=Tektronix 7B70|
|manufacturer=Tektronix
summary=200 MHz Timebase|
|type=7B70
image=Tek-7b70-front.jpg |  
|summary=200 MHz Timebase
caption=Tektronix 7B70|
|image=Tek-7b70-front.jpg
introduced=1970|
|caption=Tektronix 7B70
discontinued=1975|
|introduced=1969
series=[[7000-series scopes]]|
|discontinued=1975
manuals=
|designers=Murlan Kaufman
* [http://bama.edebris.com/download/tek/7b70/tek-7b70.pdf Tektronix 7B70 Manual (PDF)]
|series=7000-series scopes
* [http://w140.com/smb/7b70_sm.pdf Tektronix 7B70 Manual (OCR, PDF)]
|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]].
The '''Tektronix 7B70''' is a 200 MHz time-base plug-in for [[7000-series scopes]]. It has no delay function.   
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
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.
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The 7B71/7B70 were superseded by the [[7B85]]/[[7B80]] pair (400 MHz) in 1976.
The 7B71/7B70 were superseded by the [[7B85]]/[[7B80]] pair (400 MHz) in 1976.


{{BeginSpecs}}
{{BeginSpecs}}
{{Spec | Sweep rate | 2 ns/div to 5 s/div, optional ×10 magnifier }}
{{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 | Trigger modes | P-P auto, auto, norm, single }}
{{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}}
{{EndSpecs}}


==X-Y operation==
==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.  
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.
In amplifier mode, gain can be varied using an uncalibrated potentiometer.


==Links==
==Links==
* [[Media:Tekscope_1974_V6_N4.pdf|Troubleshooting the 7B70 and 7B71 timebases. Tekscope Vol.6 No.4 Sept/Oct 1974]]
* [http://www.barrytech.com/tektronix/tek7000/tek7b70.html Tek 7B70 @ barrytech.com]
* [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]
* [http://www.amplifier.cd/Test_Equipment/Tektronix/Tektronix_7000_series_timebase/timebase_7B70.htm Tek 7B70 @ amplifier.cd]
{{Documents|Link=7B70}}
{{PatentLinks|7B70}}


==Internals==
==Internals==
The 7B70 contains three 148-0034-00 [[miniature relays]].
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==
==Pictures==
<gallery>
<gallery>
Tek-7b70-front.jpg | 7B70, front panel
Tek-7b70-front.jpg | 7B70, front panel
Tek-7b70-left.jpg | 7B70, left side
Tek-7b70-left.jpg | 1973 LHS
Tek-7b70-right.jpg | 7B70, right side
Tek-7b70-right.jpg | 1973 RHS
7B70 LHS 1969.jpg  | 1969 LHS
7B70 RHS 1969.jpg  | 1969 RHS
Tek 7b70 1.JPG
Tek 7b70 1.JPG
</gallery>
</gallery>


==Components==
{{Parts|7B70}}
[[Category:7000 series horizontal plugins]]
[[Category:7000 series horizontal plugins]]

Latest revision as of 10:46, 19 June 2024

Tektronix 7B70
200 MHz Timebase
Tektronix 7B70

Compatible with 7000-series scopes

Produced from 1969 to 1975

Manuals
(All manuals in PDF format unless noted otherwise)
Manuals – Specifications – Links – Pictures

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.

Key Specifications

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
Excluded portions of sweep None in 7700-series, first 50 ns with magnifier
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
Trigger coupling DC, AC (>30 Hz), AC HF REJ (30 Hz to 50 kHz), AC LF REJ (>30 kHz)
Trigger input 1 MΩ // 20 pF, max. 500 V DC+peak AC
Jitter less than 1 ns at 150 MHz
Trigger Modes Peak-Peak Auto, Auto, Norm, Single Sweep
External horizontal amplifier 25 mV/Div or 250 mV/Div ranges, variable

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

Documents Referencing 7B70

Document Class Title Authors Year Links
Tekscope 1969 V1 N5 Oct 1969.pdf Article Introducing the New Generation 1969 7000-series scopes • 7504 • 7704 • 7A11 • 7A12 • 7A13 • 7A14 • 7A16 • 7A22 • 7S11 • 7M11 • 7B50 • 7B51 • 7B70 • 7B71 • 7T11 • R5030 • 7000 series readout system • Miniature relays • Cam switches • Industrial Design • T7500 • T7700 • P6052 • P6053 • C-50 • C-51 • 204-2
Tekscope 1969 V1 N6 Dec 1969.pdf Article A New Logic for Oscilloscope Displays 1969 7000-series scopes • 7A11 • 7A12 • 7A13 • 7A14 • 7A16 • 7A22 • 7B50 • 7B51 • 7B70 • 7B71 • 7S11 • 7T11 • 7504 • 7704
7000 series brochure March 1973.pdf Brochure 7000 series brochure, March 1973 1973 7A11 • 7A12 • 7A13 • 7A14 • 7A15A • 7A16A • 7A17 • 7A18 • 7A19 • 7A21N • 7A22 • 7B50 • 7B53A • 7B70 • 7B71 • 7B92 • 7CT1N • 7D11 • 7D13 • 7D14 • 7D15 • 7M11 • 7L12 • 7S11 • 7S12 • 7T11 • 7704A • R7704 • 7904 • R7903 • 7603 • R7603 • 7403N • R7403N • 7313 • R7313 • 7613 • R7613 • 7623 • R7623 • P7001
Tekscope 1974 V6 N4.pdf Article Troubleshooting the 7B70 and 7B71 Time Bases Jim Lawe 1974 7B70 • 7B71
Tekscope 1974 V6 N5.pdf Article Understanding oscilloscope trigger controls 1974 475 • 7B70

Patents that may apply to 7B70

Page Title Inventors Filing date Grant date Links
Patent US 3562464A Cam actuated switch having movable and fixed contacts on circuit board Howard Vollum • Willem H Verhoef • Tony Sprando 1968-10-07 1971-02-09 Cam switches • 2101 • 2701 • 2703 • 432 • 434 • 465 • 475 • 5A15N • 5A18N • 5A20N • 5A21N • 5A38 • 5A45 • 5B10N • 5B12N • 7A15 • 7A16A • 7A18 • 7A19 • 7A24 • 7A26 • 7B10 • 7B15 • 7B50 • 7B51 • 7B52 • 7B53A • 7B50A • 7B70 • 7B71 • 7B80 • 7B85 • 7B87 • 7B92 • 7B92A • 7D01 • 7D12 • 7D15 • 7J20 • 7S12 • 7T11 • 7T11A • AF501 • AM502 • AM503 • DC502 • DC503 • DC504 • DC505 • DM501 • DM502 • FG501 • FG501A • FG502 • FG503 • FG504 • FG507 • PG501 • PG502 • PG505 • PG506 • PG506A • PG508 • TG501 • SC502 • SC503 • SC504
Patent US 3584174A Push-button switch apparatus having cam actuated switch contacts and selective illumination means Tony Sprando • Peter S Winkelmann 1969-06-09 1971-06-08 Back-lit switches • 7A11 • 7A12 • 7A13 • 7A14 • 7A16 • 7A16P • 7A22 • 7A42 • 7B42N • 7B50 • 7B51 • 7B52 • 7B53A • 7B70 • 7B71 • 7B92 • 7B92A • 7D10 • 7D11 • 7D12 • 7D114 • 7D15 • 7D20 • 7F10 • 7L5 • 7L12 • 7L13 • 7L14 • 7L18 • 7M13 • 7S11 • 7S12 • 7T11 • 067-0587-00 • 067-0587-01 • 067-0587-02 • 067-0587-10

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

  • 7B70, front panel

    7B70, front panel

  • 1973 LHS

    1973 LHS

  • 1973 RHS

    1973 RHS

  • 1969 LHS

    1969 LHS

  • 1969 RHS

    1969 RHS

Components

Some Parts Used in the 7B70

Part Part Number(s) Class Description Used in
148-0034-00 148-0034-00 Discrete component miniature DPDT relay 5A48 • 7A11 • 7A13 • 7A14 • 7B70 • 7B71 • 7503 • 7904 • 7904A
148-0035-00 148-0035-00 Discrete component miniature SPDT relay 7A13 • 7A14 • 7B70 • 7B71
1N3717 152-0381-00 • 152-0125-00 Discrete component 4.7 mA, 25 pF tunnel diode 1L40 • 1S1 • 1S2 • 11B1 • 11B2 • 11B2A • 147A • 1470 • 148 • 21A • 22A • 3B4 • 3B5 • 408 • 432 • 434 • 453 • 453A • 454 • 466 • 491 • 5T3 • 544 • RM544 • 546 • RM546 • 547 • RM547 • 556 • RM556 • 7B70 • 7B71 • 7D11
SMTD995 152-0140-01 Discrete component 10 mA, 8 pF tunnel diode 1S1 • 1S2 • 1502 • 21A • 22A • 3T5 • 3T6 • 475 • 475A • 475M • 544 • R544 • 546 • RM546 • 547 • RM547 • 556 • R556 • 581A • 585A • RM585 • 7B52 • 7B53N • 7B70 • 7B71 • 7D10 • 7D11 • 7T11 • 7T11A • R7912 • S-51 • S-52 • TU-5 • 067-0572-00 • 067-0572-01 • 067-0681-00
STD704 152-0125-00 Discrete component 4.7 mA tunnel diode 1L40 • 1S1 • 11B1 • 11B2 • 11B2A • 147 • R147 • 147A • R147A • 1470 • 148 • R148 • 148-M • 149 • R149 • 149A • R149A • 21A • 22A • 3B4 • 3B5 • 408 • 432 • 434 • 453 • 453A • 454 • 464 • 465 • 466 • 491 • 5T3 • 544 • RM544 • 546 • RM546 • 547 • RM547 • 556 • RM556 • 7B70 • 7B71 • 7D11
TD253 152-0154-00 Discrete component 10 mA, 9 pF germanium tunnel diode 547 • 7B70 • TU-5
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