7B50
The Tektronix 7B50 is a timebase plug-in for 7000-series scopes, particularly the 7500 series, introduced in 1969. It is specified for triggering up to 100 MHz. Triggering uses tunnel diodes. The sweep is fully discrete, no ICs. It was replaced by the 7B50A in 1976.
The task of designing the 7B50 was inherited and completed by Murlan Kaufman.
Key Specifications
| Sweep | 5 s/Div to 50 ns/Div in 1−2−5 sequence, ×10 magnifier down to 5 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 150 mV (ext) up to 10 MHz, 1.5 Div or 750 mV from 10 MHz to 100 MHz |
| Trigger coupling | DC, AC (>16 Hz), AC HF REJ (16 Hz to 100 kHz), AC LF REJ (>75 kHz) |
| Trigger input | 1 MΩ // 20 pF max. 500 V DC+peak AC |
| Jitter | less than 1 ns at 75 MHz |
| Trigger Modes | Peak-Peak Auto, Auto, Norm, Single Sweep |
| External horizontal amplifier | 90 mV/Div or 900 mV/Div ranges, 10:1 variable |
X-Y operation
The 7B50 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.
Pictures
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7B50
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7B50
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7B50
