MDO3034 350 MHz 4 Up to 3 GHz. MDO3054 500 MHz 4 Up to 3 GHz. Tektronix 878-0784-XX 4 Channel 500 MHz Attenuator Board. This attenuator board is tested and shown working. It can be upgraded by purchasing an upgrade from Tek to get it to 1 Ghz.
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