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The '''Tektronix 502''' is a dual-beam oscilloscope [[introduced in 1958]], followed by the 502A in 1963. | The '''Tektronix 502''' is a dual-beam oscilloscope [[introduced in 1958]], followed by the 502A in 1963. | ||
Both beams have differential inputs. | Both beams have differential inputs. The horizontal deflection plates are common to both beams. | ||
An internal switch allows the upper beam amplifier to be connected to the horizontal deflection plates for single-beam X-Y operation, providing a differential X input with the same sensitivity as the Y channel. The upper beam is positioned off screen in this mode. | |||
==Specifications== | ==Specifications== | ||