T202
The Tektronix T202 is a battery-powered, hand-held 5 MHz digital storage scope with voltmeter and frequency counter functions. It has a 128x128 monochrome LCD.
This was an OEM version of a Createc SC series unit, introduced in the mid-1980s, which was also sold under the Gossen/Norma brand.
Key Specifications
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Pictures
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The slide switches are patented
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The screws for opening the unit are hidden behind so called "warranty plugs". These plugs can't be removed without destroying them
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4 boards are stacked upon each other. The digital board is covered within an aluminium foil
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View on the potentiometer for LCD contrast and the protection resistors
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view on the BNC connecters. The ground path is protected with a 4mm glass fuse
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Top view on the analog board. he A/D converter is a PNA7509 - a 7bit/22MHz unit.
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The bottom reveals some SMD components
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Top view of the digital board. It contains a microcontroller with typical RAM/Rom combination, but also a voltage reference and 2 proprietary ICs for signal processing.
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The bottom reveals some SMD components
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Overview of the display board
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The display unit is a complete package
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The external powersupply with removed battery cover
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Closeup of the power supply board
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Rear view of the power supply board
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A bag with a pair of probes
