7B70: Difference between revisions
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in conjunction with the model [[7B71]] delaying timebase. The 7B70/7B71 were | 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The 7B71/7B70 were superseded by the [[7B85]]/[[7B80]] pair (400 MHz) in 1976. | The 7B71/7B70 were superseded by the [[7B85]]/[[7B80]] pair (400 MHz) in 1976. | ||
Revision as of 15:56, 2 February 2021
Template:Plugin Sidebar 2 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The 7B71/7B70 were superseded by the 7B85/7B80 pair (400 MHz) in 1976.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 rate | 2 ns/div to 5 s/div, optional ×10 magnifier |
|---|---|
| Trigger modes | P-P auto, auto, norm, single |
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
- Troubleshooting the 7B70 and 7B71 timebases. Tekscope Vol.6 No.4 Sept/Oct 1974
- Tek 7B70 @ barrytech.com
- Tek 7B70 @ amplifier.cd
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
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7B70, front panel
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7B70, left side
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7B70, right side
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