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7S14: Difference between revisions
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* [http://w140.com/7s14_instruction.pdf Tektronix 7S14 Instruction Manual (PDF)] | * [http://w140.com/7s14_instruction.pdf Tektronix 7S14 Instruction Manual (PDF)] | ||
}} | }} | ||
The 7S14 is a 1 GHz dual-trace delayed sweep sampler plug-in. | The '''Tektronix 7S14''' is a 1 GHz dual-trace delayed sweep sampler plug-in. | ||
It is a complete sampling system unlike, for example, the [[7S12]], | It is a complete sampling system unlike, for example, the [[7S12]], | ||
which requires a separate timing plug-in to provide triggering | which requires a separate timing plug-in to provide triggering | ||
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The 7S14 contains two samplers, trigger and sweep circuitry, and circuitry to interface it with the 7000-series mainframe in which it operates. The mainframe provides the 7S14 with power. The 7S14 sends the mainframe horizontal, vertical and readout signals. | The 7S14 contains two samplers, trigger and sweep circuitry, and circuitry to interface it with the 7000-series mainframe in which it operates. The mainframe provides the 7S14 with power. The 7S14 sends the mainframe horizontal, vertical and readout signals. | ||
There are two 1. | There are two 1.35 V mercury button cells, BT1 and BT2, in the sampler circuit. | ||
They act as floating bias sources, so if a 7S14 stops working it may be not defective, | They act as floating bias sources, so if a 7S14 stops working it may be not defective, | ||
just dead batteries. First check the voltage on the cells. | just dead batteries. First check the voltage on the cells. | ||
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In triggered mode, the signal passes through two stages of | In triggered mode, the signal passes through two stages of | ||
[[MC1672]] ECL logic gate, and then into the [[155-0109]] trigger chip. | [[MC1672]] ECL logic gate, and then into the [[155-0109]] trigger chip. | ||
In HF-sync mode, the 7S14 uses a [[BD4]] back diode (0. | In HF-sync mode, the 7S14 uses a [[BD4]] back diode (0.1 mA, 3 pF), and inductor, and a | ||
[[152-0177-00]] tunnel diode ( | [[152-0177-00]] tunnel diode (10 mA, 4 pF) to form an oscillator that oscillates | ||
somewhere between 16. | somewhere between 16.5 MHz and 25 MHz. | ||
The sampler used by the 7S14 is a two-diode design. | The sampler used by the 7S14 is a two-diode design. | ||
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==Specifications== | ==Specifications== | ||
{{BeginSpecs}} | |||
{{Spec| Rise time | 350 ps (1 GHz bandwidth) }} | |||
{{Spec| Vertical deflection | 2 mV/Div to 0.5 V/Div in 1—2—5 sequence }} | |||
{{Spec| Sweep rate | 100 µs/Div to 100 ps/Div in 1—2—5 sequence }} | |||
{{Spec| Input impedance | 50 Ω }} | |||
{{Spec| Maximum input voltage | 5 V peak }} | |||
{{Spec| Features | | |||
* Dual channel, CH1 / CH2 / Dual / Add / X—Y modes | |||
* Delayed timebase | * Delayed timebase | ||
* | * DC Offset controls | ||
}} | |||
{{EndSpecs}} | |||
==Links== | ==Links== | ||