CuriousMarc Breaking The US$33,000 HP 3GHz Signal Generator he Bought for US$150

There was a 15 pin DB connector without a housing that allowed the cable to be plugged in offset and he accidentally fried some of the digital logic controlling the analog circuits. In this I learned about the Analog Devices ADG201A Quad SPST Switch and Data Strobing in serial communications. That's a bit that Ben Eater hasn't covered yet in his serial communications videos. It's good to know about this stuff because it makes you really appreciate how much is in a UART. 

They needed to get a working example to reverse engineer this part of the circuit, using clues from an unpublished HP service manual. See the first video: Curious Marc Fixing a US$33,000 HP 3GHz Signal Generator he Bought for US$150.


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