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565: Difference between revisions
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The vertical characteristics are mostly determined by the vertical plug-ins. | The vertical characteristics are mostly determined by the vertical plug-ins. | ||
The fastest sweep is 1 μs/div (100 ns/div with 10x horizontal magnification enabled). | The fastest sweep is 1 μs/div (100 ns/div with 10x horizontal magnification enabled). | ||
The sweep delay can be adjusted over a range from 10 μs to 50 seconds. | |||
Power consumption, including plug-ins, is about 600 watts, maximum. | Power consumption, including plug-ins, is about 600 watts, maximum. | ||
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and then is discriminated by a [[6DJ8]]-based Schmitt trigger. | and then is discriminated by a [[6DJ8]]-based Schmitt trigger. | ||
The 565 is also unusual in that it employs a [[tunnel diodes|tunnel diode]] (D845, a [[TD4]], which is equivalent to the [[1N3718]]) in the trace intensification circuit. | The 565 is also unusual in that it employs a [[tunnel diodes|tunnel diode]] | ||
(D845, a [[TD4]], which is equivalent to the [[1N3718]]) in the trace intensification circuit. | |||
The tunnel diode forms a bistable multivibrator: kick it one way and it turns on and stays on, | The tunnel diode forms a bistable multivibrator: kick it one way and it turns on and stays on, | ||
kick it the other way and it turns off and stays off. | kick it the other way and it turns off and stays off. | ||
which is a 2N404 germanium PNP transistor. | The tunnel diode is DC-coupled to the base-emitter junction of Q843, | ||
to be germanium. | which is a 2N404 germanium PNP transistor. | ||
Contrast this with the timebase A trigger of the [[585|585A]], which uses a tunnel diode AC-coupled to a transistor, which | Because the tunnel diode and transistor are DC-coupled, the transistor needs to be germanium. | ||
makes the forward voltage of the transistor's base-emitter junction irrelevant. | This is one of the rare cases when a failed germanium transistor cannot be replaced with a silicon part. | ||
Contrast this with the timebase A trigger of the [[585|585A]], which uses a tunnel diode AC-coupled to a transistor, | |||
which makes the forward voltage of the transistor's base-emitter junction irrelevant. | |||
=== Calibrator === | === Calibrator === | ||
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=== Auxiliary Power Jack === | === Auxiliary Power Jack === | ||
The 565 has an [[Amphenol 165 series connectors|Amphenol 165 series connector]] (J780) on the rear panel, which allows the 565 to provide power to external devices. | The 565 has an [[Amphenol 165 series connectors|Amphenol 165 series connector]] (J780) on the rear panel, | ||
which allows the 565 to provide power to external devices. | |||
The pinout and specs are shown below. | |||
== Comparison with the [[556]] == | == Comparison with the [[556]] == | ||
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== Mechanical == | == Mechanical == | ||
Benchtop (565) and rackmount versions (RM565) were made. | Benchtop (565) and rackmount versions (RM565) were made. | ||
The benchtop version has the following dimensions: | |||
* Width: 17 inches | * Width: 17 inches | ||
* Height: 13.5 inches | * Height: 13.5 inches | ||