HP 83480A Digital Communications Analyzer Teardown

[TerraHertz]

http://everist.org/NobLog/20141029_HP83480A_teardown.htm

The thing ended up on my bench a lot sooner than I'd expected.

[PA0PBZ]

The "Power Statistics" really made me wonder at first, but it was probably reset together with the RTC.

[TerraHertz]

The "Power Statistics" really made me wonder at first, but it was probably reset together with the RTC.

Actually that pic was from when I first turned it on after unpacking. I'm curious about those numbers too, and why the date/time was so wrong. The 'length last Poff' might be right, 'time since Pon' is correct, but the 'total Pon time: 13.67hrs' has to be garbage. Wrapped around maybe?
Power cycles = 15 is hard to believe too.

As I play with it, I'll be watching for any sign that the thing is crashing, and maybe corrupting memory where it keeps values like those. So far, it's been solid. Except for when I fed it a bad floppy disk, and the disk access code seemed to get hung up on whatever was wrong with the floppy.