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The Tektronix 556 is a [[dual-beam scopes|dual-beam scope]], the successor to the Tektronix [[555]]. | The '''Tektronix 556''' is a [[dual-beam scopes|dual-beam scope]], the successor to the Tektronix [[555]]. | ||
It uses [[letter-series and 1-series plug-ins]]. | It uses [[letter-series and 1-series plug-ins]]. A rack-mount version, the R556, also exists. | ||
A rack-mount version, the R556, also exists. | |||
The 556, which is wider than the average 500-series scope, fits in the [[205]] cart. | The 556, which is wider than the average 500-series scope, fits in the [[205]] cart. | ||
The 556 was the last 500-series scope produced. | The 556 was the last 500-series scope produced. | ||
It was present in the 1974 catalog, but gone in the 1975 catalog. | It was present in the 1974 catalog, but gone in the 1975 catalog. | ||
== Dual-Beam Modes == | == Dual-Beam Modes == | ||
The 556 is a true dual-beam scope and none of the signal path is shared between the two beams. Electrically speaking, the power supply and the calibrator are the only parts that are common to both beams. The 556 has almost complete left-right symmetry, corresponding to upper and lower beams. Although the beams can be operated completely independently, the 556 provides many options for routing signals between the vertical plug-ins, triggers, sweeps, horizontal and vertical amplifiers. For example, a common use for a 556 is to view two simultaneous single-shot events, both sweeps being triggered by one of the traces. For this purpose, the 556 allows the output of one sweep generator to be routed to the horizontal amplifier of the other beam, so it drives both beams. Many other more sophisticated modes are also available. | The 556 is a true dual-beam scope and none of the signal path is shared between the two beams. Electrically speaking, the power supply and the calibrator are the only parts that are common to both beams. The 556 has almost complete left-right symmetry, corresponding to upper and lower beams. | ||
Although the beams can be operated completely independently, the 556 provides many options for routing signals between the vertical plug-ins, triggers, sweeps, horizontal and vertical amplifiers. For example, a common use for a 556 is to view two simultaneous single-shot events, both sweeps being triggered by one of the traces. For this purpose, the 556 allows the output of one sweep generator to be routed to the horizontal amplifier of the other beam, so it drives both beams. Many other more sophisticated modes are also available. | |||
==Comparison with other scopes== | ==Comparison with other scopes== | ||